MITSUBISHI ELECTRIC PCA-RP71HAQ (01) PDF MANUAL


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PDF Content Summary: SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS SPLIT-TYPE, AIR CONDITIONERS SERVICE MANUAL Indoor unit July 2014 No. OCH492 REVISED EDITION-A Revision:

[Model Name] PCA-RP71HAQ PCA-RP125HAQ [Service Ref.] PCA-RP71HAQ PCA-RP71HAQ-ER PCA-RP125HAQ CONTENTS • Added PCA-RP71HAQR-ER in REVISED EDITION-A. • Some descriptions have been modified. • Please void OCH492. Notes: • This manual describes service data of the indoor units only. • RoHS compliant products have <G> mark on the spec name plate. Model name indication INDOOR UNIT TEMP. ON/OFF 1. REFERENCE MANUAL................................... 2 2. SAFETY PRECAUTION...................................3 3. PARTS NAMES AND FUNCTIONS................. 6 4. SPECIFICATIONS...........................................10 5. NOISE CRITERION CURVES........................ 11 6. OUTLINES AND DIMENSIONS......................12 7. WIRING DIAGRAM.............................................14 8. REFRIGERANT SYSTEM DIAGRAM............. 15 9. TROUBLESHOOTING....................................16 10. SPECIAL FUNCTION.....................................27 11. DISASSEMBLY PROCEDURE.......................32 PARTS CATALOG (OCB492)

REMOTE CONTROLLER (Option) 1 REFERENCE MANUAL 1-1. OUTDOOR UNIT’S SERVICE MANUAL Model Name Service Ref. Service Manual No.

PUHZ-RP71VHA4 PUHZ-RP125/140VKA PUHZ-RP125/140/250YKA PU(H)-P71VHAR3 PUHZ-RP71VHA4 PUHZ-RP125/140VKA PUHZ-RP125/140/250YKA PU(H)-P71VHAR3.UK OCH451 OCB451

PU(H)-P71/125/140YHAR3 PUHZ-P125/140VHA3R2 PUHZ-P125/140YHAR1 PU(H)-P71/125/140YHAR3.UK OC379 PUHZ-P125/140VHA3R2.UK PUHZ-P125/140YHAR1.UK OCH415/OCB415

PUHZ-P250YHA3R2 PUHZ-P250YHA3R2 OCH424/OCB424 PUHZ-ZRP71VHA PUHZ-ZRP71VHAR1(-ER) OCH527 OCB527 1-2. TECHNICAL DATA BOOK Series (Outdoor unit) Manual No. PUHZ-RP • HA4 PUHZ-RP • KA OCS16 PUHZ-P • VHA3 PUHZ-P • YHAR3 OCS17 PUHZ-ZRP • VKA OCS24

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2 SAFETY PRECAUTION 2-1. ALWAYS OBSERVE FOR SAFETY Before obtaining access to terminal, all supply circuits must be disconnected. 2-2. CAUTIONS RELATED TO NEW REFRIGERANT Cautions for units utilising refrigerant R407C

Do not use the existing refrigerant piping. The old refrigerant and lubricant in the existing piping contains a large amount of chlorine which may cause the lubricant deterioration of the new unit. Use “low residual oil piping” If there is a large amount of residual oil (hydraulic oil, etc.) inside the piping and joints, deterioration of the lubricant will result. Store the piping to be used indoors during installation, and keep both ends of the piping sealed until just before brazing. (Leave elbow joints, etc. in their packaging.) If dust, dirt, or water enters the refrigerant cycle, deterioration of the oil and compressor trouble may result. The refrigerant oil applied to flare and flange connections must be ester oil, ether oil or alkylbenzene oil in a small amount. If large amount of mineral oil enter, that can cause deterioration of refrigerant oil, etc. Use liquid refrigerant to charge the system. If gas refrigerant is used to seal the system, the composition of the refrigerant in the cylinder will change and performance may drop. Do not use a refrigerant other than R407C. If another refrigerant (R22, etc.) is used, the chlorine in the refrigerant may cause the lubricant deterioration. Use a vacuum pump with a reverse flow check valve. The vacuum pump oil may flow back into the refrigerant cycle and cause the lubricant deterioration. Ventilate the room if refrigerant leaks during operation. If refrigerant comes into contact with a flame, poisonous gases will be released.

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[1] Cautions for service · After recovering the all refrigerant in the unit, proceed to working. · Do not release refrigerant in the air. · After completing the repair service, recharge the cycle with the specified amount of liquid refrigerant. [2] Refrigerant recharging (1) Refrigerant recharging process 1Direct charging from the cylinder. · R407C cylinder available on the market has a syphon pipe. · Leave the syphon pipe cylinder standing and recharge it. (By liquid refrigerant) Unit Gravimeter (2) Recharge in refrigerant leakage case · After recovering the all refrigerant in the unit, proceed to working. · Do not release the refrigerant in the air. · After completing the repair service, recharge the cycle with the specified amount of liquid refrigerant. [3] Service tools Use the below service tools as exclusive tools for R407C refrigerant. No. Tool name Specifications 1 Gauge manifold · Only for R407C · Use the existing fitting SPECIFICATIONS. (UNF7/16) · Use high-tension side pressure of 3.43MPa·G or over. 2 Charge hose · Only for R407C · Use pressure performance of 5.10MPa·G or over. 3 Electronic scale — 4 Gas leak detector · Use the detector for R134a or R407C. 5 Adaptor for reverse flow check · Attach on vacuum pump. 6 Refrigerant charge base — 7 Refrigerant cylinder · For R407C · Top of cylinder (Brown) · Cylinder with syphon 8 Refrigerant recovery equipment —

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CAUTIONS RELATED TO NEW REFRIGERANT Cautions for units utilising refrigerant R410A

Use new refrigerant pipes. In case of using the existing pipes for R22, be careful with the followings. · For RP71VHA3 and RP125 be sure to perform replacement operation before test run. · Change flare nut to the one provided with this product. Use a newly flared pipe. · Avoid using thin pipes. Use a vacuum pump with a reverse flow check valve. Vacuum pump oil may flow back into refrigerant cycle and that can cause deterioration of refrigerant oil, etc. Use the following tools specifically designed for use with R410A refrigerant. The following tools are necessary to use R410A refrigerant. Tools for R410A

Make sure that the inside and outside of refrige rant piping is clean and it has no contaminants such as sulfur, oxides, dirt, shaving particles, etc, which are hazards to refrigerant cycle. In addition, use pipes with specified thickness. Contamination inside refrigerant piping can cause deterio ration of refrigerant oil, etc. Gauge manifold Charge hose Gas leak detector Torque wrench Keep the tools with care. Flare tool Size adjustment gauge Vacuum pump adaptor Electronic refrigerant charging scale

Store the piping to be used during installation indoors, and keep both ends of the piping sealed until just before brazing. (Leave elbow joints, etc. in their packaging.) If dirt, dust or moisture enter into refrigerant cycle, that can cause deterioration of refrigerant oil or malfunction of com pressor. The refrigerant oil applied to flare and flange connections must be ester oil, ether oil or alkylbenzene oil in a small amount. If large amount of mineral oil enter, that can cause deterio ration of refrigerant oil, etc. Charge refrigerant from liquid phase of gas cylinder. If the refrigerant is charged from gas phase, composition change may occur in refrigerant and the efficiency will be lowered. Do not use refrigerant other than R410A. If other refrigerant (R22, etc.) is used, chlorine in refrige rant can cause deterioration of refrigerant oil, etc. [1] Cautions for service If dirt, dust or moisture enter into refrigerant cycle, that can cause deterioration of refrigerant oil or malfunction of com pressor. Do not use a charging cylinder. If a charging cylinder is used, the composition of refrigera nt will change and the efficiency will be lowered. Use the specified refrigerant only. Never use any refrigerant other than that specified. Doing so may cause a burst, an explosion, or fire when the unit is being used, serviced, or disposed of. Correct refrigerant is specified in the manuals and on the spec labels provided with our products. We will not be held responsible for mechanical failure, system malfunction, unit breakdown or accidents caused by failure to follow the instructions. Ventilate the room if refrigerant leaks during operation. If refrigerant comes into contact with a flame, poisonous gases will be released.

(1) Perform service after collecting the refrigerant left in unit completely. (2) Do not release refrigerant in the air. (3) After completing service, charge the cycle with specified amount of refrigerant. (4) When performing service, install a filter drier simultaneously. Be sure to use a filter drier for new refrigerant. [2] Additional refrigerant charge When charging directly from cylinder · Check that cylinder for R410A on the market is syphon type. · Charging should be performed with the cylinder of syphon stood vertically. (Refrigerant is charged from liquid phase.)

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Unit Gravimeter [3] Service tools Use the below service tools as exclusive tools for R410A refrigerant. No. Tool name Specifications 1 Gauge manifold · Only for R410A · Use the existing fitting specifications. (UNF1/2) · Use high-tension side pressure of 5.3MPa·G or over. 2 Charge hose · Only for R410A · Use pressure performance of 5.09MPa·G or over. 3 Electronic scale — 4 Gas leak detector · Use the detector for R134a, R407C or R410A. 5 Adaptor for reverse flow check · Attach on vacuum pump. 6 Refrigerant charge base — 7 Refrigerant cylinder · Only for R410A · Top of cylinder (Pink) · Cylinder with syphon 8 Refrigerant recovery equipment — 3 PARTS NAMES AND FUNCTIONS 3-1. Indoor (Main) Unit Left/right guide vanes

Air outlet Up/down guide vanes Change the direction of airflow from the vartical blower. OCH492A Change the direction of airflow from the horizontal blower. Air intake 6 Oil filter (Air intake) It prevents oil from getting into the unit.

3-2. Wired remote controller (Option) <PAR-30MAA><PAR-31MAA> The functions which can be used are restricted according to each model.

Display The main display can be displayed in two different modes: "Full" and "Basic." The initial setting is "Full." 1 Operation mode 12

13 Indoor unit operation mode appears here. Appears when the buttons are locked. 15

Full mode 7 12 6 8 14 Room 181716 Fri 3 19 20 2 Preset temperature Preset temperature appears here. 3 Clock (See the Installation Manual.) Current time appears here. 13 Appears when the On/Off timer or Night setback function is enabled. 14 Appears when the Weekly timer is enabled.

9 10 1 11 Cool Set temp. Auto 4 Mode Temp. Fan 4 Fan speed Fan speed setting appears here. 5 Button function guide Functions of the corresponding buttons appear here. 15 Appears while the units are operated in the energy-save mode. 16 Appears while the outdoor units are operated in the silent mode. Basic mode 2 21 5 2 3 Fri 6 Appears when the ON/OFF operation is centrally controlled. 7 Appears when the operation mode is centrally controlled. 8 Appears when the preset temperature is centrally controlled. 17 Appears when the built-in thermistor on the remote controller is activated to monitor the room temperature. appears when the thermistor on the indoor unit is activated to monitor the room temperature. 18 Indicates the vane setting. 1 Cool Set temp. Auto 4 9 Appears when the filter reset function is centrally controlled. 10 19 Indicates the louver setting. 20

Mode Temp. Fan Appears when filter needs maintenance . 11 Room temperature Indicates the ventilation setting. 21

(See the Installation Manual.) All icons are displayed for explanation. 5 Current room temperature appears here. Appears when the preset temperature range is restricted.

Controller interface 1 ON/OFF button Press to turn ON/OFF the indoor unit. 2 SELECT button Press to save the setting. 3 RETURN button The functions of the function buttons change depending on the screen. Refer to the button function guide that appears at the bottom of the LCD for the functions they serve on a given screen. When the system is centrally controlled, the button function guide that corresponds to the locked button will not appear. Main display Main menu

5 Press to return to the previous screen. Fri Main Main menu

4 MENU button Press to bring up the Main menu. Room Cool Auto Set temp. Mode Temp. Fan Vane·Louver·Vent. (Lossnay) High power Timer Weekly timer OU silent mode Main display: Cursor Page

6 234 1 Function buttons 5 Backlit LCD Operation settings will appear. When the backlight is off, pressing any button turns the backlight on and it will stay lit for a certain period of time depending on the screen. 6 ON/OFF lamp This lamp lights up in green while the unit 7 8 9 10 7 8 9 10 Function guide 7 Function button F1 Main display: Press to change the operation mode. Main menu: Press to move the cursor down. 8 Function button F2 Main display: Press to decrease temperature. Main menu: Press to move the cursor up.

10987 • When the backlight is off, pressing any button turns the backlight on and does not perform its function. (except for the ON/OFF button) • Most settings (except ON/OFF, mode, fan speed, temperature) can be made from the Menu screen. 7 OCH492A is in operation. It blinks while the remote controller is starting up or when there is an error. 9 Function button F3 Main display: Press to increase temperature. Main menu: Press to go to the previous page. 10 Function button F4 Main display: Press to change the fan speed. Main menu: Press to go to the next page.

Main menu list Setting and display items Setting details

Vane · Louver · Vent. (Lossnay) Use to set the vane angle. • Select a desired vane setting from five different settings. Use to turn ON / OFF the louver. • Select a desired setting from "ON" and "OFF." Use to set the amount of ventilation. • Select a desired setting from "Off," "Low," and "High."

High power Use to reach the comfortable room temperature quickly. • Units can be operated in the High-power mode for up to 30 minutes. Timer On/Off timer* Use to set the operation On/Off times. • Time can be set in 5-minute increments. Auto-Off timer Use to set the Auto-Off time. • Time can be set to a value from 30 to 240 in 10-minute increments. Weekly timer* Use to set the weekly operation On / Off times. • Up to eight operation patterns can be set for each day. (Not valid when the On/Off timer is enabled.) Restriction Temp. range Use to restrict the preset temperature range. • Different temperature ranges can be set for different operation modes. Operation lock Use to lock selected functions. • The locked functions cannot be operated. Energy saving Auto return Use to get the units to operate at the preset temperature after performing energy-save operation for a specified time period. • Time can be set to a value from 30 and 120 in 10-minute increments. (This function will not be valid when the preset temperature ranges are restricted.) Schedule* Set the start/stop times to operate the units in the energy-save mode for each day of the week, and set the energy-saving rate. • Up to four energy-save operation patterns can be set for each day. • Time can be set in 5-minute increments. • Energy-saving rate can be set to a value from 0% or 50 to 90% in 10% increments. Night setback* Use to make Night setback settings. • Select "Yes" to enable the setting, and "No" to disable the setting. The temperature range and the start/stop times can be set. Filter information Use to check the filter status. • The filter sign can be reset. Error information Use to check error information when an error occurs. • Check code, error source, refrigerant address, unit model, manufacturing number, contact information (dealer's phone number) can be displayed. (The unit model, manufacturing number, and contact information need to be registered in advance to be displayed.) Maintenance Auto descending panel Auto descending panel (Optional parts) Up / Down you can do. Manual vane angle Use to set the vane angle for each vane to a fixed position. Initial setting Main/Sub When connecting two remote controllers, one of them needs to be designated as a sub controller. Clock Use to set the current time. Main display Use to swich between "Full" and "Basic" modes for the Main display. • The initial setting is "Full." Contrast Use to adjust screen contrast. Display details Make the settings for the remote controller related items as necessary. Clock: The initial settings are "Yes" and "24h" format. Temperature: Set either Celsius (°C) or Fahrenheit (°F). Room temp. : Set Show or Hide. Auto mode: Set the Auto mode display or Only Auto display. Auto mode Whether or not to use the Auto mode can be selected by using the button. This setting is valid only when indoor units with the Auto mode function are connected. Administrator password The administrator password is required to make the settings for the following items. • Timer setting • Energy-save setting • Weekly timer setting • Restriction setting • Outdoor unit silent mode setting • Night set back Language selection Use to select the desired language. Service Test run Select "Test run" from the Service menu to bring up the Test run menu. • Test run • Drain pump test run Input maintenance Select "Input maintenance Info." from the Service menu to bring up the Maintenance information screen. The following settings can be made from the Maintenance Information screen. • Model name input • Serial No. input • Dealer information input Function setting Make the settings for the indoor unit functions via the remote controller as necessary. Check Error history: Display the error history and execute "delete error history". Refrigerant leak check: Refrigerant leaks can be judged. Smooth maintenance: The indoor and outdoor maintenance data can be displayed. Request code: Details of the operation data including each thermistor temperature and error history can be checked. Self check Error history of each unit can be checked via the remote controller. Maintenance password Take the following steps to change the maintenance password. Remote controller check When the remote controller does not work properly, use the remote controller checking function to trouble shoot the problem. *Clock setting is required.

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3-3. Wired remote controller (Option) <PAR-21MAA> The functions which can be used are restricted according to each model. Display Section Day-of-Week Shows the current day of the week. For the purposes of explanation, “Sensor” indication Displays when the remote controller sensor is used.

all parts of the display are shown. During actual operation, only the relevant items will be lit. Identifies the current operation Shows the operating mode, etc. Multilanguage display is available. Time/Timer Display Shows the current time, unless the simple or Auto Off timer is set. If the simple or Auto Off timer is set, the time to be switched off is shown. TIME SUN MON TUE WED THU FRI SAT “Locked” indicator Indicates that remote controller but tons have been locked. “Clean The Filter” indicator To be displayed on when it is time to clean the filter.

“Centrally Controlled” indicator Indicates that operation from the remote controller has been prohib ited by a master controller. °F°C TIMER AFTER ONLY1Hr. Hr AFTER ERROR CODE °F°C ON OFF FUNCTION FILTER WEEKLY SIMPLE AUTO OFF Timer indicators The indicator comes on if the corre sponding timer is set. Fan Speed indicator Shows the selected fan speed.

“Timer is Off” indicator Indicates that the timer is off. Temperature Setting Shows the target temperature. Operation Section Temperature setting buttons Down Up Timer Menu button (Monitor/Set button) Mode button (Return button) Set Time buttons Up/Down Air Direction indica tor The indicator shows the direc tion of the outcoming airflow. “One Hour Only” indicator Displays if the airflow is set to low or downward during COOL or DRY mode. (Operation varies according to model.) The indicator goes off in 1 hour, when the airflow direction also changes. TEMP. Room Temperature display Shows the room temperature. The room temperature display range is 8 to 39°C. The display blinks if the temperature is less than 8°C or 39°C or more. Louver display Indicates the action of the swing louver. Does not appear if the louver is not running. (Power On indicator) Indicates that the power is on. ON/OFF Ventilation indicator Appears when the unit is running in Ventilation mode. ON/OFF button Fan Speed button Filter button (<Enter> button) Test Run button Check button (Clear button)

Back MENU ON/OFF FILTER

Ahead BACK MONITOR/SET DAY CHECK TEST Airflow Up/Down button

Caution: Timer On/Off button (Set Day button) Opening the cover PAR-21MAA CLOCK OPERATION CLEAR Built-in temperature sensor Louver button ( Operation button) To return operation number Ventilation button ( Operation button) To go to next operation number

Only the Power on indicator lights when the unit is stopped and power supplied to the unit. If you press a button for a feature that is not installed at the indoor unit, the remote controller will display the “Not Available” message. If you are using the remote controller to drive multiple indoor units, this message will appear only if the feature is not present at every unit connected. When power is turned ON for the first time, it is normal that “PLEASE WAIT” is displayed on the room temperature indication (For max. 2 minutes). Please wait until this “PLEASE WAIT” indication disappear then start the operation.

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4 SPECIFICATIONS Service Ref. Mode Power supply (phase, cycle, voltage) Cooling PCA-RP71HAQ PCA-RP71HAQ-ER Single phase, 50Hz, 230V Heating

T I N U RO OD NI Input Running current Starting current External finish Heat exchanger Fan Fan (drive) × No. Fan motor output Airflow (Low-High) External static pressure Operation control & Thermostat Noise level (Low-High) Unit drain pipe I.D. kW A A kW K/min (CFM) Pa (mmAq) dB mm (in) 0.09 0.43 0.86 Stainless steel Plate fin coil Sirocco fan (direct) × 2 0.04 17-19 (600-670) 0 (direct blow) Remote controller & built-in 34-38 26 (1) 0.09 0.43 0.86 Dimensions Weight Service Ref. Mode W D H mm (in) mm (in) mm (in) kg (lb) 1,136 (44-3/4) 650 (25-5/8) 280 (11) 41 (90) PCA-RP125HAQ Cooling Heating Power supply (phase, cycle, voltage) Input Running current Starting current External finish Heat exchanger T I Fan Fan (drive) × No. N U Fan motor output R Airflow (Low-High) O O External static pressure D Operation control & Thermostat N I Noise level (Low-High) Unit drain pipe I.D. kW A A kW K/min (CFM) Pa(mmAq) dB mm (in) 0.26 1.19 2.38 Single phase, 50Hz, 230V Stainless steel Plate fin coil Sirocco fan (direct) × 4 0.08 + 0.08 30-38 (1,060-1,350) 0 (direct blow) Remote controller & built-in 44-50 26 (1) 0.26 1.19 2.38

Dimensions Weight OCH492A W D H mm (in) mm (in) mm (in) kg (lb) 10 1,520 (59-7/8) 650 (25-5/8) 280 (11) 56 (124)

5 NOISE CRITERION CURVES

PCA-RP71HAQ PCA-RP71HAQ-ER 90 80 ) r a b µ 2 0 NOTCH High Low SPL(dB) 38 34 LINE PCA-RP125HAQ NOTCH High Low 90 80 ) r a b µ 2 0 70 0 SPL(dB) 50 44 LINE

0 0. 0 = B d 0 ( B d , L EV E L E R U SS E R P D NU O S DN A B E V AT CO 70 60 50 40 30 20 APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE NC-70 NC-60 NC-50 NC-40 NC-30 NC-20 0. 0 = B d 0 ( B d , LE V E L ER U SS E R P DN U O S DNA B E V AT CO 60 50 40 30 20 APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE NC-70 NC-60 NC-50 NC-40 NC-30 NC-20

10 63 125 250 500 1000 2000 4000 8000 BAND CENTER FREQUENCIES, Hz 1m 1m unit about 1.4m MICROPHONE 10 63 125 250 500 1000 2000 4000 8000 BAND CENTER FREQUENCIES, Hz ceiling

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6 OUTLINES AND DIMENSIONS PCA-RP71HAQ Unit: mm

PCA-RP71HAQ-ER x o b k 90° c o l 130 b s l 2 a 2 0 e 2 0 n c i (Gap to ceiling) 2 ~ 3 n a h t 0 52

) F 8/ 5 : n o it c e n n o c d ) F 8/ 3 : n o it c e n n o c d e r ) . D. I m m 6 2( n o it c e n t n e m e gn a t ne me 0 0 ) . c p 1 ( E- F O82 F 4 0 4 1 8 1 9 78 5 8 5 4 6 2 2 [ 210 [ 38 5 01 m r e T ) 2 2 1 ( 6 6 3 6 7 1 0 84 8 13 t r l l a n a r a e l c g n i w o ll A g n 300 Less than ss eL 500 0 0 1 or more e r o m r o e r a lf/ e di s e pi p s a g( a lf/ e di s e pi p di u qil ( n o c e pi p e ga n i a r D r r a g n i pi p - t n a r e gi r f gn a r r a e pi p - t n a r e gi r f 7 2 [ - 2 : t n e m e g n a r ) e n il g n it c e n n o c r o ) r e ll o r 2 [ - 2 : ) e k a t n i r i a h S- C A P : le do m , )0 02 1 165 120 70~90 90 295 254 13 3 a p e l b a t s u jd A > w r ae R 650 Less than il ie C 6 3 11 0 0 1 e r o m ro

n oi n oi → e r er ra o dt tn s er [ 43 ) yr

t c e n n o c e p i p - t n a r e gi r f e R 1 t c e n n o c e p i p - t n a r e gi r f e R 2 ) y r o s s e c c a ( e s o h e l b i x e l F 3 d n ih e b r o f e lo h t u o kc o n K4 r e pp u r o f e l o h t u o k c o n K 5 g n i r i w r o f e l o h t u o k c o n K 6 u o /r o o d n i (k c o l b l a n i m r e T 7 o c e t o m e r (k c o l b l a n i m r e T 8 f r o f t c u d ( e l o h t u o k c o n K 9 ( e g n a l f t c u d: s t r a p n o it pO 5 9 4 5 7 0 8 0 2 3 t l o b n o > h c t i p t l o b n o is n e ps u S< 75 243 280 0 7 9 8 2 0 5 6 t r o p o s s e c c a ( e s o h e l b i x e l F < ) r ) o s s n e > n o is n e m i d r u o tn o c r e tl e l dn a h 16 288 0 6 3 e gn a h c x e e ht r o f t n e m e l e r ) . s c p2 1 ( E- F K8 3 G S- C A P : le

<gas> <liquid> 197 175 is n e ps u S <Air outlet> n o it c e p e s e pi p( c e i p- 3 ( r i F< <Air intake> e t li F do m

21 110 s n I et

5 1 0 3 1 5 2 x o b k c o l b l a n i m r e T 1 x o b l a c i r t c 4 221 102 110 258 l i F 5 7 > h c t i p t > l t o e l b t u n o o i r s i > n A e e < k 8 6 p 6 a 9 3 s 8 t 0 1 u 9 1 1 n i S r < i 0 A 8 . < 1 t 1 l o b r o h c n a r o f w G e N r I c S s A C 8 / N 3 A F W

e l E OCH492A f o f l a h m o t t o b e h T 12 . d e t a r a p e s e b n a c . S ET ON r o 01 M e s U. 1

PCA-RP125HAQ Unit: mm (Gap to ceiling)

0 0 90° 2 2 2 2~3 n 0

2 [ [ s e a ht ss eL 52

) F 4 / 3 , F 8/ 5 : n o it c e n n o c d e r a ) F 8/ 3 : n o it c e n n o c d e r a lf/ ) . D. I m m 6 2 ( n o it c e n n o t n e m e gn a r r a t n e m e gn a 7 2 ) e 0 0 2 [ ) . c p 1 ( E- F O 82 F S- 7 8 4 0 9 6 2 130 38 210 ) 2 2 1 ( 6 4 2 6 0 44 0 44 8 92 x o b k c o l b l a n i m r e T l l a w r c n a r a e l c g n i w o l l A 650 300 Less than g n i l or more 500 e r o 0 m 0 r 1 o 0 2 lf / e di s e pi p s a g( n o it c e n n o c e pi p - t n a r e gi r fe e di s e pi p di u qi l( n o it c e n n o c e pi p - t n a r e gi r fe c e pi p e g a n i a r D ) yr o s s e c c a ( e s o h e l bi x e g n i pi p - t n a r e gi r f e r d n ih e b r o f e lo h t u o kc o r r a e pi p - t n a r e gi r f e r r e p p u r o f e lo h t u o kc o [ - 2 : t n e m e g n a r r a g n i r i w r o f e l o h t u o k c o n il g n it c e n n o c r o o dt u o /r o o d n i( kc o l b la n i m r ) r e ll o r t n o c e t o m e r ( kc o l b la n i m r - 2 : ) e k a t n i r i a hs e r f r o f t c u d ( e lo h t u o kc o C A P : l e d o m , )0 0 2 [( e g n a l f t c u d : s t r a p n o i t p 41 8 1 5 94 5 7 5 8 5165 4 90 120 1 295 254 70~90 43 > 0 8 h c t i p t l o b 0 n 2 o i 3 s n e p s u S 243 < t 5 01 13 0 7 71 9 82 t r a p e l b a t s u j d A 3 0 5 6 > ) yr o s s e c c a ( e s o h e l bi x e l F< a e R > n o is n e m i d r u o tn Less than e l d n a h ie C 0 6 3 e gn a hc x e e ht r o f t n e 5 1 0 0 1 ) . s c p 2 1 ( E - F K 8 3 G S - e r o m ro e z i s t u n e r a lf l a i ti n I : R1 R2 lF 3 n K4 n K5 n K6 e T7 e T8 n K9 O lo b n o 75 280 t r o p n ) r o s n e ) s e c e i o c re 16 288 m el e C A P : l 5 2 2 5 8 8. 5 0.

<gas> <liquid> 197 175 is n e ps <Air outlet> o it c e p s e pi p( p- 4 ( r e t tl i F< <Air intake> r e tl iF e do m 1P R . 9 [ 5 1 [ 9 1 [

5 1 0 3 1 5 x o b k c o l b l a n i m r e T 2 21 110 1 8 061 u S > h c t i p t l o b n o i s n e p s u S < 4 6 5 1 102 110 5 7 > t e lt u o r i A < 0 7 3 1 0 251 s n I li F 258 2 841 > e k a t n i r i A< e z i s e pi p e l b a li a v A . e z i E DI S DI U QI L 2 E DI S SA G 1

OCH492A x o b l a c i r tc e lE 13 G NI SA C N A F f o fl a h m o tt o b e hT . d e t a r a p e s e b n a c . S ET ON tl o b r o hc n a r o f w e r c s 8/ 3 W r o 01 M e s U . 1 s e pi p e ht g n it e e m s t u n t n e r r u c e ht e s U . 2 . ti n u r o o dt u o e ht fo

7 WIRING DIAGRAM PCA-RP71HAQ PCA-RP125HAQ PCA-RP71HAQ-ER [LEGEND]

SYMBOL NAME SYMBOL NAME Check code Symptom

P. B I. B FUSE CN2L CN32 CN41 CN51 LED1 LED2 LED3 X1 INDOOR POWER BOARD INDOOR CONTROLLER BOARD FUSE (T6.3AL250V) CONNECTOR (LOSSNAY) CONNECTOR (REMOTE SWITCH) CONNECTOR (HA TERMINAL-A) CONNECTOR (CENTRALLY CONTROLL) POWER SUPPLY (I. B) POWER SUPPLY (R. B) TRANSMISSION (INDOOR-OUTDOOR) RELAY (DEW PREVENTION HEATER) MF1, MF2 C1, C2 H2 TB2 TB4 TB5,TB6 TH1 FAN MOTOR CAPACITOR (FAN MOTOR) DEW PREVENTION HEATER TERMINAL BLOCK (INDOOR UNIT POWER (OPTION PARTS)) TERMINAL BLOCK (INDOOR/OUTDOOR CONNECTING LINE) TERMINAL BLOCK (REMOTE CONTROLLER TRANSMISSION LINE) ROOM TEMP.THERMISTOR (0°C/15kΩ, 25°C/5.4kΩ DETECT) P1 Abnormality of room temperature thermistor (TH1) P2 Abnormality of pipe temperature thermistor/Liquid (TH2) P6 Freezing/overheating protection is working. P8 Abnormality of pipe temperature P9 Abnormality of pipe temperature thermistor/Cond.Eva. (TH5) E0 - E5 Abnormality of the signal transmission between remote controller and indoor unit E6 - EF Abnormality of the signal transmission between indoor unit and outdoor unit Abnormality of indoor controller board Fb

X4 RELAY (FAN MOTOR) TH2 PIPE TEMP.THERMISTOR/LIQUID U* , F* Abnormality in outdoor unit. Refer to outdoor unit wiring diagram.

X5 X6 SW1 RELAY (FAN MOTOR) RELAY (FAN MOTOR) SWITCH (MODEL SELECTION) wSee Table 1. SWITCH (CAPACITY CODE) wSee Table 2. TH5 (0°C/15kΩ, 25°C/5.4kΩ DETECT) COND./ EVA.TEMP.THERMISTOR (0°C/15kΩ, 25°C/5.4kΩ DETECT) ---- No trouble generated in the past. FFFF No corresponding unit

SW2 WIRED REMOTE CONTROLLER BOARD R. B

SWE N SWITCH (EMERGENCY OPERATION) MF2 MF1 M 1~ M1~ T For PCA-RP125HAQ P.B

RO D E R K L B U L B W L Y HW N R O D E R K L B U L B W L Y T H W CNSK (RED) CN2S (WHT) Please set the voltage using the

ORN 654321 T BRN H2 654321 11 DC13.1V 2 remote controller. For the setting method, please refer to

C1 RED K L B U L B W L Y HW C2 GRY K L B U L B W L Y T H W 3 YLW ORN TB4 S1 TO the indoor unit Installation Manual.

S2 ORN S3 I.B BRN OUTDOOR UNIT w1 (Fig.1) TB2

FAN D.HEATER W L Y W L Y D E R POWER T H W W L Y POWER N R O K L B T H W RED BLU GRN/YLW L N POWER SUPPLY ~(1PHASE)

3 1 1 3 1 2 1 3 230V 50Hz

(WHT) 1 3 5 7 CNC (RED) CNDK (RED) 1 3 CND (ORN) E S POWER CN2D(WHT) INDOOR/OUTDOOR COMMUNICATION CN3C(BLU) YLW TB4

X6 X5 X4 X1 UF CN41 CN2L CN51 CN32 ORN ORN S1 S2 TO

4 1 12 N BRN S3 S3 OUTDOOR

15 31 UNIT I.B YLW OR

SWE ON SW2 SW1 LED3 LED2 LED1 INTAKE CN20 LIQUID CN21 PIPE CN29 REMOCON CN22 13 13

(RED) (WHT) (BLK) (BLU) POWER INDOOR/OUTDOOR

OFF 12 12 12 12 CND (ORN) COMMUNICATION CN3C (OPTION PARTS)

K L 2 K L 2 U TB5 L (BLU) R.B

Refer to tables 1 1 2 2

B and 2 for service PCB. B 1 3 B 1 2 1 TRANSMISSION WIRES DC12V TB6 2

Table 1 SW1 t° t° t° TH1 TH2 TH5 Table 2 SW2

Service board 1 2 3 4 5 MODELS Service board 1 2 3 4 5 MODELS Service board 1 2 3 4 5

ON OFF PCA-RP71HAQ ON OFF PCA-RP125HAQ ON OFF

The black square (■) indicates a switch position. NOTES: 1. Since the outdoor side electric wiring may change be sure to check the outdoor unit electric wiring for servicing. 2. Indoor and outdoor connecting wires are made with polarities, make wiring matching terminal numbers (S1,S2,S3). 3. Symbols used in wiring diagram above are, : Connector, : Terminal (block). w1 When work to supply power separately to Indoor and Outdoor unit was applied, refer to Fig1. w2 For power supply system of this unit, refer to the caution label located near this diagram.

OCH492A 14

8 REFRIGERANT SYSTEM DIAGRAM PCA-RP71HAQ PCA-RP125HAQ PCA-RP71HAQ-ER Strainer

#50 Heat exchanger Refrigerant GAS pipe connection (Flare) Condenser/evaporator temperature thermistor (TH5) Refrigerant LIQUID pipe connection (Flare) Pipe temperature Refrigerant flow in cooling Refrigerant flow in heating

Room temperature thermistor (TH1) OCH492A thermistor/liquid (TH2) Distributor with strainer #50 Strainer #50 15

9 TROUBLESHOOTING 9-1. TROUBLESHOOTING <Check code displayed by self-diagnosis and actions to be taken for service (summary)> Present and past check codes are logged, and they displayed on the wired remote controller or controller board of outdoor unit. Actions to be taken for service, which depends on whether or not the trouble is reoccurring in the field, are summarized in the table below. Check the contents below before investigating details. Note : Refer to the manual of outdoor unit for malfunction-diagnosis method by remote controller. Unit conditions at service Check code Actions to be taken for service (summary)

The trouble is reoccurring. The trouble is not reoccurring. OCH492A Displayed Not displayed Logged Not logged Judge what is wrong and take a corrective action according to “9-2.SELF-DIAGNOSIS ACTION TABLE”. Conduct troubleshooting and ascertain the cause of the trouble according to “9-3. TROUBLESHOOTING BY INFERIOR PHENOMENA ”. 1Consider the temporary defects such as the work of protection devices in the refrigerant circuit including compressor, poor connection of wiring, noise, etc. Re-check the symptom, and check the installation environment, refrigerant amount, weather when the trouble occurred, and wiring related. 2Reset check code logs and restart the unit after finishing service. 3There is no abnormality in electrical components, controller boards, and remote controller. 1Recheck the abnormal symptom. 2Identify the cause of the trouble and take a corrective action according to “9-3. TROUBLESHOOTING BY INFERIOR PHENOMENA ”. 3Continue to operate unit for the time being if the cause is not ascertained. 4There is no abnormality in electrical components, controller boards, remote controller, etc. 16

9-2. SELF-DIAGNOSIS ACTION TABLE Note: Errors to be detected in outdoor unit, such as codes starting with F, U or E (excluding E0 to E7), are not covered in this document. Please refer to the outdoor unit's service manual for the details.

Check Code Abnormal point and detection method Cause Countermeasure

P1 P2 P4 P5 Room temperature thermistor (TH1) 1 The unit is in 3-minute resume prevention mode if short/open of thermistor is detected. Abnormal if the unit does not reset normally after 3 min utes. (The unit returns to normal opera tion, if it has been reset normally.) 2 Constantly detected during cooling, drying, and heating operation. Short: −90: or more Open: −40: or less Pipe temperature thermistor/Liquid (TH2) 1 The unit is in 3-minute resume prevention mode if short/open of thermistor is detected. Abnormal if the unit does not reset normally after 3 min utes. (The unit returns to normal opera tion, if it has been reset normally.) 2 Constantly detected during cooling, drying, and heating (except defrosting) operation. Short: 90: or more Open: −40: or less Drain sensor (DS) 1 Suspensive abnormality, if short/open of thermistor is detected for 30 seconds continuously. Compressor and indoor fan will be turned off 2 Short/open is detected for 30 seconds continuously during suspensive abnormality. (The unit returns to normal operation, if it has normally reset.) 3 Detect the following condition. • During cooling and drying operation. • In case that pipe <liquid> temperature - room temperature <−10: (Except defrosting) • When pipe <liquid> temperature or room temperature is short/open temperature. • During drain pump operation. Malfunction of drain pump (DP) 1 Suspensive abnormality, if thermistor of drain sensor is let heat itself and temperature rises slightly. Compressor and indoor fan will be turned off. 2 Drain pump is abnormal if the condition above is detected during suspensive abnormality. 3 Constantly detected during drain pump operation. 1 Defective thermistor characteristics 2 Contact failure of connector (CN20) on the indoor controller board (Insert failure) 3 Breaking of wire or contact failure of thermistor wiring 4 Defective indoor controller board 1Defective thermistor characteristics 2Contact failure of connector (CN44) on the indoor control ler board (Insert failure) 3Breaking of wire or contact failure of thermistor wiring 4 Defective refrigerant circuit is causing thermistor temperature of 90: or more or 3−40: or less. 5 Defective indoor controller board 1 Defective thermistor characteristics 2 Contact failure of connector (CN31) on the indoor controller board (Insert failure) 3 Breaking of wire or contact failure of drain sensor wiring 4 Defective indoor controller board 1 Malfunction of drain pump 2 Defective drain Clogged drain pump Clogged drain pipe 3 Attached drop of water at the drain sensor • Drops of drain trickles from lead wire • Clogged filter is causing wave of drain. 4 Defective indoor controller board 1–3 Check resistance value of thermistor. 0: 15.0 k" 10: 9.6 k" 20: 6.3 k" 30: 4.3 k" 40: 3.0 k" If you put force on (draw or bend) the lead wire with measuring resistance value of thermistor, breaking of wire or contact failure can be detected. 2 Check contact failure of connector (CN20) on the indoor controller board. Refer to "9-6. TEST POINT DIAGRAM". Turn the power on again and check restart after inserting con nector again. 4 Check room temperature display on remote controller. Replace indoor controller board if there is abnormal difference with actual room temperature. Turn the power off, and on again to operate after check. 1–3 Check resistance value of thermistor. For characteristics, refer to (P1) above. 2 Check contact failure of connector (CN44) on the indoor controller board. Refer to "9-6. TEST POINT DIAGRAM". Turn the power on and check restart after inserting connector again. 4 Check pipe <liquid> temperature with remote controller in test run mode. If pipe <liquid> temperature is extremely low (in cooling mode) or high (in heating mode), refrigerant circuit may have defective. 5 Check pipe <liquid> temperature with remote controller in test run mode. If there is extremely difference with actual pipe <liquid> temperature, replace indoor controller board. Turn the power off, and on again to operate after check. 1–3 Check resistance value of thermistor. 0:......6.0 k" 10:....3.9 k" 20:....2.6 k" 30:....1.8 k" 40:....1.3 k" 2 Check contact failure of connector (CN31) on the indoor controller board. Refer to "9-6. TEST POINT DIAGRAM". Turn the power on again and check restart after inserting con nector again. 4 Replace indoor controller board if drain pump operates with the line of drain sensor connector CN31-1 and 2 is short-circuited, and abnormality reappears. Turn the power off, and on again to operate after check. 1 Check if drain pump operates. 2 Check drain function. 3 Check the setting of lead wire of drain sensor and check clogs of the filter. 4 Replace indoor controller board if drain pump operates with the line of drain sensor connector CN31-1 and 2 is short-circuited and abnormality reappears. Refer to "9-6. TEST POINT DIAGRAM". Turn the power off, and on again to operate after check.

OCH492A 17

Check Code Abnormal point and detection method Cause Countermeasure

P6 P8 Freezing/overheating protection is oper ating 1 Freezing protection (Cooling mode) The unit is in 6-minute resume preven tion mode if pipe <liquid or condenser/ evaporator> temperature stays under −15: for 3 minutes, 3 minutes after the compressor started. Abnormal if it stays under −15: for 3 minutes again within 16 minutes after 6-minute resume pre vention mode. 2 Overheating protection (Heating mode) The units is in 6-minute resume prevention mode if pipe <condenser / evaporator> temperature is detected as over 70: after the compressor started. Abnormal if the temperature of over 70: is detected again within 30 minutes after 6-minute resume prevention mode. Pipe temperature <Cooling mode> Detected as abnormal when the pipe tem perature is not in the cooling range 3 min utes after compressor start and 6 minutes after the liquid or condenser/evaporator pipe is out of cooling range. Note 1: It takes at least 9 minutes to detect. Note 2: Abnormality P8 is not detected in drying mode. Cooling range : −3 °C ] (TH−TH1) TH: Lower temperature between liquid pipe temperature (TH2) and condenser/ evaporator temperature (TH5) TH1: Intake temperature <Heating mode> When 10 seconds have passed after the compressor starts operation and the hot adjustment mode has finished, the unit is detected as abnormal when condenser/ evaporator pipe temperature is not in heat ing range within 20 minutes. Note 3: It takes at least 27 minutes to detect abnormality. Note 4: It excludes the period of defrosting. (Detection restarts when defrosting mode is over.) Heating range : 3 °C [ (TH5−TH1) OCH492A (Cooling or drying mode) 1 Clogged filter (reduced airflow) 2 Short cycle of air path 3 Low-load (low temperature) operation out of the tolerance range 4 Defective indoor fan motor • Fan motor is defective. • Indoor controller board is defec tive. 5 Defective outdoor fan control 6 Overcharge of refrigerant 7 Defective refrigerant circuit (clogs) (Heating mode) 1 Clogged filter (reduced airflow) 2 Short cycle of air path 3 Over-load (high temperature) operation out of the tolerance range 4 Defective indoor fan motor • Fan motor is defective. • Indoor controller board is defec tive. 5 Defective outdoor fan control 6 Overcharge of refrigerant 7 Defective refrigerant circuit (clogs) 8 Bypass circuit of outdoor unit is defective. 1 Slight temperature difference between indoor room temperature and pipe <liquid or condenser / evaporator> temperature thermistor • Shortage of refrigerant • Disconnected holder of pipe <liquid or condenser / evaporator> thermistor • Defective refrigerant circuit 2 Converse connection of extension pipe (on plural units connection) 3 Converse wiring of indoor/ outdoor unit connecting wire (on plural units connection) 4 Defective detection of indoor room temperature and pipe <condenser / evaporator> temperature thermistor 5 Stop valve is not opened completely. 18 (Cooling or drying mode) 1 Check clogs of the filter. 2 Remove blockage. 4 Refer to "9-5. HOW TO CHECK THE PARTS". 5 Check outdoor fan motor. 67 Check operating condition of refrigerant circuit. (Heating mode) 1 Check clogs of the filter. 2 Remove blockage. 4 Refer to "9-5. HOW TO CHECK THE PARTS". 5 Check outdoor fan motor. 6–8Check operating condition of refrigerant circuit. 1–4 Check pipe <liquid or condenser / evapo rator> temperature with room tempera ture display on remote controller and outdoor controller circuit board. Pipe <liquid or condenser / evaporator> temperature display is indicated by set ting SW2 of outdoor controller circuit board as follows. Conduct temperature check with outdoor controller circuit board after connecting (‘A-Control Service Tool(PAC-SK52ST)’. ) 23Check converse connection of extension pipe or converse wiring of indoor/outdoor unit connecting wire.

Check Code Abnormal point and detection method Cause Countermeasure

P9 E0 or E4 E3 or E5 Pipe temperature thermistor / Condenser-Evaporator (TH5) 1 The unit is in 3-minute resume protec tion mode if short/open of thermistor is detected. Abnormal if the unit does not get back to normal within 3 minutes. (The unit returns to normal operation, if it has been reset normally.) 2 Constantly detected during cooling, drying, and heating operation (except defrosting) Short: 90: or more Open:−40: or less Remote controller transmission error(E0)/signal receiving error(E4) 1 Abnormal if main or sub remote con troller cannot receive any transmission normally from indoor unit of refrigerant address “0” for 3 minutes. (Check code : E0) 2 Abnormal if sub remote controller could not receive any signal for 2 minutes. (Check code: E0) 1 Abnormal if indoor controller board can not receive any data normally from remote controller board or from other indoor controller board for 3 minutes. (Check code: E4) 2 Indoor controller board cannot receive any signal from remote controller for 2 minutes. (Check code: E4) Remote controller transmission error(E3)/signal receiving error(E5) 1 Abnormal if remote controller could not find blank of transmission path for 6 sec onds and could not transmit. (Check code: E3) 2 Remote controller receives transmitted data at the same time and compares the received and transmitted data. Abnormal if these data are judged to be different 30 continuous times. (Check code: E3) 1 Abnormal if indoor controller board could not find blank of transmission path. (Check code: E5) 2 Indoor controller board receives trans mitted data at the same time and com pares the received and transmitted data. Abnormal if these data are judged to be different 30 continuous times. (Check code: E5) 1 Defective thermistor characteristics 2 Contact failure of connector (CN44) on the indoor controller board (Insert failure) 3 Breaking of wire or contact failure of thermistor wiring 4 Temperature of thermistor is 90: or more or −40: or less caused by defective refrigerant circuit. 5 Defective indoor controller board 1 Contact failure at transmission wire of remote controller 2 All remote controllers are set as “sub” remote controller. In this case, E0 is displayed on remote controller, and E4 is displayed at LED (LED1, LED2) on the outdoor controller circuit board. 3 Miswiring of remote controller 4 Defective transmitting receiving circuit of remote controller 5 Defective transmitting receiving circuit of indoor controller board of refrigerant addresses “0”. 6 Noise has entered into the transmission wire of remote controller. 1 2 remote controllers are set as “main.” (In case of 2 remote controllers) 2 Remote controller is connected with 2 indoor units or more. 3 Repetition of refrigerant address 4 Defective transmitting receiving circuit of remote controller 5 Defective transmitting receiving circuit of indoor controller board 6 Noise has entered into trans mission wire of remote control ler. 1–3 Check resistance value of thermistor. For characteristics, refer to (P1) above. 2 Check contact failure of connector (CN44) on the indoor controller board. Refer to "9-6. TEST POINT DIAGRAM". Turn the power on and check restart after inserting connector again. 4 Operate in test run mode and check pipe <condenser / evaporator> temperature with outdoor controller circuit board. If pipe <condenser / evaporator> temperature is extremely low (in cooling mode) or high (in heating mode), refrigerant circuit may have defect. 5 Operate in test run mode and check pipe <condenser / evaporator> temperature with outdoor control circuit board. If there is extreme difference with actual pipe <condenser / evaporator> temperature, replace indoor controller board. There is no abnormality if none of above comes within the unit. Turn the power off and on again to operate. In case of checking pipe temperature tool (PAC-SK52ST). ( ) with outdoor controller circuit board, be sure to connect A-control service 1 Check disconnection or looseness of indoor unit or transmission wire of remote controller. 2 Set one of the remote controllers “main” if there is no problem with the action above. 3 Check wiring of remote controller. • Total wiring length: max. 500 m (Do not use cable × 3 or more.) • The number of connecting indoor units: max. 16 units • The number of connecting remote control ler: max. 2 units When it is not the above-mentioned problem of 1–3 4 Diagnose remote controllers. a) When “RC OK” is displayed, Remote controllers have no problem. Turn the power off, and on again to check. If abnormality generates again, replace indoor controller board. b) When “RC NG” is displayed, Replace remote controller. c) When “RC E3” or “ERC 00-66” is dis played, noise may be causing abnormality. Note: If the unit is not normal after replacing indoor controller board in group control, indoor con troller board of address “0” may be abnormal. 1 Set a remote controller to main, and the other to sub. 2 Remote controller is connected with only one indoor unit. 3 The address changes to a separate setting. 4–6 Diagnose remote controller. a) When “RC OK” is displayed, remote con trollers have no problem. Turn the power off, and on again to check. When becoming abnormal again, replace indoor controller board. b) When “RC NG” is displayed, replace remote controller. c) When “RC E3” or “ERC 00–66” is dis played, noise may be causing abnormality.

OCH492A 19

Check Code Abnormal point and detection method Cause Countermeasure

E6 E7 Fb Indoor/outdoor unit communication error (Signal receiving error) 1 Abnormal if indoor controller board cannot receive any signal normally for 6 minutes after turning the power on. 2 Abnormal if indoor controller board cannot receive any signal normally for 3 minutes. 3 Consider the unit abnormal under the following condition: When 2 or more indoor units are connected to an outdoor unit, indoor controller board cannot receive a signal for 3 minutes from outdoor controller circuit board, a signal which allows outdoor controller circuit board to transmit signals. Indoor/outdoor unit communication error (Transmitting error) Abnormal if “1” receiving is detected 30 times continuously though indoor controller board has transmitted “0”. Indoor controller board Abnormal if data cannot be read normally from the nonvolatile memory of the indoor controller board. 1 Contact failure, short circuit or, miswiring (converse wiring) of indoor/outdoor unit connecting wire 2 Defective transmitting receiving circuit of indoor controller board 3 Defective transmitting receiving circuit of indoor controller board 4 Noise has entered into indoor/ outdoor unit connecting wire. 1 Defective transmitting receiving circuit of indoor controller board 2 Noise has entered into power supply. 3 Noise has entered into outdoor control wire. 1 Defective indoor controller board Note: Check LED display on the outdoor control circuit board. (Connect A-control service tool, PAC-SK52ST.) Refer to outdoor unit service manual. 1 Check disconnection or looseness of indoor/ outdoor unit connecting wire of indoor unit or outdoor unit. Check all the units in case of twin triple indoor unit system. 2-4 Turn the power off, and on again to check. If abnormality generates again, replace indoor controller board or outdoor controller circuit board. Note: Other indoor controller board may have defect in the case of twin triple indoor unit system. 1-3 Turn the power off, and on again to check. If abnormality generates again, replace indoor controller board. 1 Replace indoor controller board.

E1 or E2 Remote controller control board 1 Abnormal if data cannot be read normally from the nonvolatile memory of the remote controller control board. (Check code: E1) 2 Abnormal if the clock function of remote controller cannot be operated normally. (Check code: E2) 1 Defective remote controller 1 Replace remote controller.

PA Forced compressor stop (due to water leakage abnormality) 1 When the intake temperature subtracted with liquid pipe temperature is less than −10:, drain sensor is detected whether it is soaked in the water or not at the interval of 90 seconds. (Drain pump will start operating when the drain sensor is detected to be soaked in the water.) 2 The unit has a water leakage abnormality when the following conditions, a and b, are satisfied while the above-mentioned detection is performed. a) The drain sensor is detected to be soaked in the water 10 times in a row. b) The intake temperature subtracted with liquid pipe temperature is detected to be less than -10: for a total of 30 minutes. (When the drain sensor is detected to be NOT soaked in the water, the detection record of a and b will be cleared.) 3 The drain sensor detection is performed in operations other than cooling. (When the unit stops operating, during heating or fan operation, when the unit stops because of some abnormality) Note: Once the water leakage abnormality is detected, abnormality state will not be released until the main power is reset. OCH492A 1 Drain pump trouble 2 Drain defective · Drain pump clogging · Drain pipe clogging 3 Open circuit of drain sensor side heater 4 Contact failure of drain sensor connector 5 Dew condensation on drain sensor · Drain water descends along lead wire. · Drain water is waving due to filter clogging. 6 Extension piping connection difference at twin, triple or quadruple system 7 Miswiring of indoor/ outdoor con necting at twin, triple or quadruple system 8 Room temperature thermistor / liquid pipe temperature thermistor detection is defective. 20 1 Check the drain pump. 2 Please confirm whether water can be drained. 3 Confirm the resistance of the drain sensor. 4 Check the connector contact failure. 5 Check the drain sensor leadwire mounted. Check the filter clogging 6 Check the piping connection. 7 Check the indoor/ outdoor connecting wires. 8 Check the room temperature display of remote controller. Check the indoor liquid pipe temperature display of outdoor controller board.

9-3. TROUBLESHOOTING BY INFERIOR PHENOMENA Note: Refer to the manual of outdoor unit for the detail of remote controller. Phenomena Cause Countermeasure

(1)LED2 on indoor controller board is off. OCH492A • When LED1 on indoor controller board is also off. 1 Power supply of rated voltage is not supplied to out door unit. 2 Defective outdoor controller circuit board 3 Power supply of 220–240 V is not supplied to indoor unit 4 Defective indoor power board 5 Defective indoor controller board (For the separate indoor/outdoor unit power sup ply system) 1 Power supply of 220–240 V AC is not supplied to indoor unit. 2 The connectors of the optional replacement kit are not used. 3 Defective indoor controller board 4 Defective indoor power board • When LED1 on indoor controller board is lit. 1 Mis-setting of refrigerant address for outdoor unit (There is no unit corresponding to refrigerant address “0”.) 21 1 Check the voltage of outdoor power supply terminal block (L, N) or (L3, N). • When 220–240 V AC is not detected. Check the power wiring to outdoor unit and the breaker. • When 220–240 V AC is detected. —Check 2 (below). 2 Check the voltage between outdoor terminal block S1 and S2. • When 220–240 V AC is not detected. Check the fuse on outdoor controller cir cuit board. Check the wiring connection. • When 220–240 V AC is detected. —Check 3 (below). 3 Check the voltage between indoor terminal block S1 and S2. • When 220–240 V AC is not detected. Check indoor/outdoor unit connecting wire for mis-wiring. • When 220–240 V AC is detected. —Check 4 (below). 4 Check voltage output from CN2S on indoor power board (13.1 V DC). Refer to "9-6-1. Power board". • When no voltage is output. Check the wiring connection. • When output voltage is between 12.5 V DC and 13.7 V DC. —Check 5 (below). 5 Check the wiring connection between indoor controller board and indoor power board. Check the fuse on indoor controller board. If no problems are found, indoor controller board is defective. 1 Check the voltage of indoor power supply terminal block (L,N). • When 220–240 V AC is not detected. Check the power supply wiring. • When 220–240 V AC is detected. -Check 2 (below). 2 Check that there is no problem in the meth od of connecting the connectors. • When there are problems in the method of connecting the connectors. Connect the connector correctly referring to installation manual of an optional kit. • When there is no problem in the method of connecting the connectors. -Check 3 (below). 3 Check voltage output from CNDK on indoor controller board. • When 220–240 V AC is not detected. Check the fuse on indoor controller board. Check the wiring connection between indoor power supply terminal block and CND on indoor controller board. • When 220–240 V AC is detected. -Check 4 (below). 4 Check voltage output from CN2S on indoor power board. • When no voltage output. Check the wiring connection between CNDK on indoor controller board and CNSK on indoor power board. If no problem are found, indoor power board is defective. • When 12.5–13.7 V DC is detected. Check the wiring connection between CN2S on indoor power board and CN2D on indoor power board. If no problem is found, indoor controller board is defective. 1 Reconfirm the setting of refrigerant address for outdoor unit Set the refrigerant address to “0”. (For grouping control system under which 2 or more outdoor units are connected, set one of the units to “0”.) Set refrigerant address using SW1 (3-6) on outdoor controller circuit board.

Note: Refer to the outdoor unit's service manual for the detail of remote controller. Phenomena Cause Countermeasure

(2)LED2 on indoor controller board is blinking. (3)Upward/downward vane performance failure (4)Receiver for wireless remote controller • When LED1 on indoor controller board is also blinking. Connection failure of indoor/outdoor unit connecting wire • When LED1 is lit. 1 Mis-wiring of remote controller wires Under twin triple indoor unit system, 2 or more indoor units are wired together. 2 Refrigerant address for outdoor unit is wrong or not set. Under grouping control system, there are some units whose refrigerant address is 0. 3 Short-cut of remote controller wires 4 Defective remote controller 1 The vane is not downward during defrosting and heat preparation and when the thermostat is OFF in HEAT mode. (Working of COOL protection function) 2 Vane motor does not rotate. • Defective vane motor • Breaking of wire or connection failure of connector • Up/down vane setting is “No vanes”. 3 Upward/downward vane does not work. • The vane is set to fixed position. 1 Weak batteries of wireless remote controller 2 Contact failure of connector (CNB) on wireless remote controller board. (Insert failure) 3 Contact failure of connector (CN90) on indoor con troller board. (Insert failure) 4 Contact failure of connector between wireless remote controller board and indoor controller board. Check indoor/outdoor unit connecting wire for connection failure. 1 Check the connection of remote controller wires in case of twin triple indoor unit system. When 2 or more indoor units are wired in one refrigerant system, connect remote controller wires to one of those units. 2 Check the setting of refrigerant address in case of grouping control system. If there are some units whose refrigerant address is 0 in one group, set one of the units to 0 using SW1 (3-6) on outdoor controller circuit board. 34 Remove remote controller wires and check LED2 on indoor controller board. • When LED2 is blinking, check the short cut of remote controller wires. • When LED2 is lit, connect remote controller wires again and: if LED2 is blinking, remote controller is defective; if LED2 is lit, connection failure of remote controller terminal block etc. has returned to normal. 1 Normal operation (The vane is set to horizontal regardless of remote control.) 2 Check 2 (left). • Check the vane motor. (Refer to “How to check the parts”.) • Check for breaking of wire or connec tion failure of connector. • Check “Up/down vane setting”. (Unit function selection by remote controller). 3 Normal operation (Each connector on vane motor side is disconnected.) 1 Replace batteries of wireless remote con troller. 2–4 Check contact failure of each connector. If no problems are found of connector, replace indoor controller board. When the same trouble occurs even if indoor controller board is replaced, replace wireless remote controller board.

9-4. WHEN WIRED REMOTE CONTROLLER OR INDOOR UNIT MICROPROCESSOR FAILS 1. When the wired remote control or the indoor unit microprocessor has failed, but all other components work properly, if you set the switch (SWE) on the indoor controller board ON, the indoor unit will begin emergency operation. When emergency operation is activated, the indoor unit operates as follows: • Indoor fan is running at high speed. 2. When you activate emergency operation of the cooling or heating, you have to set the switch (SWE) on the indoor controller board and activate emergency operation of the outdoor unit. For details on how to activate emergency operation of the outdoor unit, refer to the outdoor unit wiring diagram. 3. Before you activate emergency operation, check the following points: (1) Emergency operation cannot be activated when: • the outdoor unit malfunctions. • the indoor fan malfunctions. • it has detected the malfunction of drain pump during self-diagnosing. (Check code: P5) (2) Emergency operation becomes continuous only by switching the power source on/off. ON/OFF on the remote control or temperature control, etc. does not function. (3) Avoid operating for a long time when the outdoor unit begins defrosting while emergency operation of the heating is acti vated because it will start to blow cold air. (4) Emergency cooling should be limited to 10 hours maximum (The indoor unit heat exchanger may freeze). (5) After emergency operation has been deactivated set the switches, etc. to their original positions. (6) Movement of the vanes does not work in emergency operation, therefore you have to slowly set them manually to the appropriate position.

OCH492A 22

9-5. HOW TO CHECK THE PARTS PCA-RP71HAQ PCA-RP125HAQ PCA-RP71HAQ-ER Parts name Check points

Room temperature thermistor (TH1) Pipe temperature Disconnect the connector then measure the resistance with a tester. (At the ambient temperature 10 to 30:)

thermistor/liquid (TH2) Condenser/evaporator temperature thermistor (TH5) Normal 4.3 to 9.6k" Abnormal Open or short Refer to the <Thermistor Characteristic Graph> below.

Fan motor(MF) Relay Measure the resistance between the terminals with a tester. (Winding temperature 20:)

Protector connector Normal

White Abnormal

ConnectorPCA-RP71 PCA-RP125

Orange Red Yellow Blue Black White–Black Black–Blue Blue–Yellow Yellow–Red Protector OPEN : 135±5: CLOSE : 95±15: 140.5" 15.4" 28.5" 80.4" 75.6" 36.7" 23.6" 47.8" Open or short

<Thermistor Characteristic Graph> < Thermistor for lower temperature >

Thermistor for lower temperature Room temperature thermistor(TH1) 50 Pipe temperature thermistor/ liquid (TH2) Condenser/evaporator temperature thermistor(TH5) 40 ) " 30 K

Thermistor R0=15 kΩ ± 3% ( e Fixed number of B=3480 kΩ ± 2% c n a t s i

1 1 s

20 Rt=15exp { 3480( ) } e R

273+t 0: 15 kΩ 10: 9.6 kΩ 20: 6.3 kΩ 25: 5.4 kΩ 30: 4.3 kΩ 40: 3.0 kΩ OCH492A 273 23 10 0 -20 -10 0 10 20 30 40 50 Temperature (:)

9-6. TEST POINT DIAGRAM 9-6-1. Power board PCA-RP71HAQ PCA-RP125HAQ PCA-RP71HAQ-ER CNSK Connect to the indoor controller board (CNDK) Between 1 to 3 220–240 V AC CN2S Connect to the indoor controller board (CN2D) Between 1 to 3 12.6–13.7 V DC (Pin1 (+))

OCH492A 24

9-6-2. Indoor controller board PCA-RP71HAQ PCA-RP125HAQ PCA-RP71HAQ-ER CN2D Connector to the indoor power board (CN2S) (12.5–13.7 V DC) CN3C LED1 Power supply (I.B) LED2 Power supply (R.B) LED3 Transmission (Indoor/outdoor)

Transmission (Indoor/outdoor) (0–24 V DC) } + – } – + CN22 Remote controller connecting wire (10.4–14.6 V DC) CND Power supply input (220–240 V AC) FUSE (6.3 A 250 V) CNDK Connect to the indoor power board (CNSK) (220–240 V AC) CNP Drain-pump output (DP) (220–240 V AC) CNC Dew prevention heater (H2) (220–240 V AC) FAN Fan motor output SWE CN20 Room temperature thermistor (TH1) CN21 Pipe temperature thermistor/Liquid (TH2) CN29 Condenser/evaporator temperature thermistor (TH5) CN31 Drain sensor (DS) CN90 Connect to the wire less remote controller board (CNB) CN41 Connector (HA terminal-A) CN6V Vane motor output (MV) CN105 CN51 Centrally control 1–2 : Control signal 13 V pulse input (1 : +) 3–4 : Operation indicator 13 V DC (3 : +) 3–5 : Malfunction indicator 13 V DC (3 : +) CN2L Connector (LOSSNAY) SW1 Model setting SW2

OCH492A Emergency operation 25 Capacity setting

9-7. FUNCTIONS OF DIP SWITCH AND JUMPER WIRE Each function is controlled by the dip switch and the jumper wire on controller board. SW1 and SW2 are equipped only for service parts. Model setting and capacity setting are preset in the nonvolatile memory of the controller board of the unit. The black square (■) indicates a switch position. (Marks in the table below) Jumper wire ( : Short : Open)

Jumper wire Functions Setting by the DIP switch and jumper wire MODEL Service board Remarks

SW1 Model settings PCA-RP • HAQ 1 2 3 4 5 ON OFF

SW2 Capacity settings MODEL Service board 1 2 3 4 5 PCA-RP71HAQ 1 2 3 4 5 PCA-RP125HAQ ON OFF ON OFF <Initial setting>

J41 J42 Pair number setting with wireless remote controller Wireless remote controller setting 0 1 2 3 ~ 9 Control PCB setting J41 J42 Wireless remote controller: 0 Control PCB: (for both J41 and J42) Four pair number settings are supported. The pair number settings of the wireless remote controller and indoor control PCB (J41/J42) are given in the table on the left. (' ' in the table indicates the jumper line is disco nnected.)

Unit type setting JP1 Indoor Model JP1 Without TH5 With TH5 Indoor controller board type JP3 There is no jumper (JP1) because these models have the cond./eva. temperature thermistor (TH5).

JP3 controller board type setting OCH492A For product Service parts 26

10 SPECIAL FUNCTION 10-1. ROTATION FUNCTION (AND BACK-UP FUNCTION, 2ND STAGE CUT-IN FUNCTION) 10-1-1. Operation (1) Rotation function (and Back-up function) • Outline of functions · Main and sub unit operate alternately according to the interval of rotation setting. Main and sub unit should be set by refrigerant address. (Outdoor DIP switch setting) Refrigerant address "00" Main unit Refrigerant address "01" Sub unit · When an error occurs to one unit, another unit will start operation. (Back-up function) • System constraint · This function is available only by the grouping control system (INDOOR UNIT : OUTDOOR UNIT=1:1) of 2 refrigerant groups. (Refer to Fig. 1) · Main indoor unit should be connected for wired remote controller and the transmission line (TB5) for main and sub unit should also be connected. (Refer to Fig. 1) (This function cannot be set by wireless remote controller.) · Set refrigerant address of each unit. (DIP switch on the outdoor unit···Refrigerant address 00/01) "00" Fig. 1

Operation pattern 1 [Back-up function only]··· Request code number "312" Error occurs on main unit. Refrigerant address Refrigerant address "01" Start operation Main Main Sub OC-1 OC-2

unit IC-1 Sub unit IC-2 Run Abnormal condition Stop Run Main unit 2 3(2) 3(2) IC-1 IC-2 2 Sub unit

2 [Rotation function] & [Back-up function]··· Request code number "313~318" RC Error occurs on main unit.

Start operation Main Sub Sub Main Main Sub OC : Outdoor unit

Main unit IC-1 Sub Run Stop Abnormal condition Run IC : Indoor unit RC : Wired remote controller

unit IC-2 Stop Run Stop Run

1~28 days 1~28 days (Ex:When the request code number is "313", each unit operates alternately in daily cycle.) Note: · When the unit is restarted to operate after turning off the power or OFF operation, the unit which was operating will start operation. · To operate the main unit, refer to "10-1-2. How to set rotation function (Back-up function, 2nd stage cut-in function)" and set the request code No. which is not the same as the current one, then set again the former request code No. (2) 2nd stage cut-in function Outline of functions · Number of operating units is determined according to the room temperature and set point. · When room temperature becomes higher than set point, standby unit starts. (2 units operation) · When room temperature falls below set point −4:, standby unit stops. (1 unit operation) System constraint

· This function is available only in rota tion operation and back-up function in cooling mode. [2nd stage cut-in function]··· Request code number "322~324" Room temp. ] Set point Start operation Sub unit start operation Main Room temp. < Set point -4: Sub unit stop

unit IC-1 Sub unit IC-2 OCH492A Run Stop Run Stop 27

10-1-2. How to set rotation function (Back-up function, 2nd stage cut-in function) You can set these functions by wired remote controller. (Maintenance monitor) NOTICE Both main and sub unit should be set in same setting. Every time replacing indoor controller board for servicing, the function should be set again. (1) Request Code List Rotation setting (Request code) Setting contents Initial Setting No. setting No.1 (310) Monitoring the request code of current setting No.2 (311) Rotation and Back-up OFF (Normal group control operation) No.3 (312) Back-up function only No.4 (313) Rotation ON (Alternating interval = 1day) and back up function No.5 (314) Rotation ON (Alternating interval = 3day) and back up function No.6 (315) Rotation ON (Alternating interval = 5day) and back up function No.7 (316) Rotation ON (Alternating interval = 7day) and back up function No.8 (317) Rotation ON (Alternating interval = 14day) and back up function No.9 (318) Rotation ON (Alternating interval = 28day) and back up function 2nd stage cut-in setting (Request code) Setting contents Initial Setting No. setting No.1 (320) Monitoring the request code of current setting No.2 (321) Cut-in function OFF No.3 (322) Cut-in Function ON(Set point = Set temp.+ 4°C(7.2°F)) No.4 (323) Cut-in Function ON(Set point = Set temp.+ 6°C(10.8°F)) No.5 (324) Cut-in Function ON(Set point = Set temp.+ 8°C(14.4°F))

OCH492A 28

(2) Setting method of each function by wired remote controller C A D B B: Refrigerant address C: Data display area D: Request code display area

4 5 1. Stop operation(1). 1 6 2 3

2. Press the button (2) for 3 seconds so that [Maintenance mode] appears on the screen (A). TEST After a while, [00] appears in the refrigerant address number display area.(at B ) 3. Press the button (3) for 3 seconds to switch to [Maintenance monitor]. CHECK Note) It is not possible to switch to [Maintenance monitor] during data request in maintenance mode (i.e., while “----” is blinking) since no buttons are operative. [----] appears on the screen (D) when [Maintenance monitor] is activated. (The display (D) now allows you to set a request code No.) 4. Press the [TEMP ( and )] buttons (4) to select the desired refrigerant address.

[ScreenB] 00 01 15

5. Press the [CLOCK ( and )] buttons (5) to set the desired request code No.(“311~318”, “321~324”) 6. Press the button (6) to perform function setting. FILTER If above setting operations are done correctly, "Request code number will appear in data display area.(C) [Example: When the "311" of "Request code number" is set, [311] appears on the screen.(C)] [Refererence] You can check current "request code number" setting by setting the "request code number"(“310” or “320”) and pressing the button.(6) FILTER [Example: When the current setting is "Setting No.2(Request code 311)", [311] appears on the screen.(C)] 7. To return to normal mode, press the button (1). [ON/OFF

OCH492A 29

(3) Setting method of each function by wired remote controller ■ PAR-30MAA/PAR-31MAA Stop operation ( ) Select "Service" from the Main menu, and press the button. Select "Check" with the F1 or F2 button, and press the button. Select "Request code" with the F1 or F2 button, and press the button. Set the Refrigerant address and Request code. Select the item to be changed with the F1 or F2 button. Select the required setting with the F3 or F4 button. Select the required code No. (311–318, 321–324) with the F3 or F4 button. ■<Ref.address>setting [ 0 ] – [ 15 ] ■<Request code>setting Press the button, Data will be collected and displayed. Request code: 311 Rotation and Back-up OFF: 0311 Check menu Error history Refrigerant volume check Refrigerant leak check Smooth maintenance Request code Service menu: Cursor F1 F2 F3 F4 Request code Ref.address Request code Request: Cursor - + F1 F2 F3 F4 Request code Ref.address Request code Request: Cursor - +

OCH492A 30

(4) Rotation and back up operation PAR-30MAA/PAR-31MAA Main Main menu 3/3 Maintenance Initial setting Service Main display: Cursor Page F1 F2 F3 F4 Service menu Enter maintenance password 9999 Select: Cursor Service menu 1/2 Test run Input maintenance info. Function setting Check Self check Main menu: Cursor Check menu 1/1 Error history Refrigerant volume check Refrigerant leak check Smooth maintenance Request code Service menu: Cursor Request code Ref.address 0 Request code 004 Request: Cursor PAR-21MAA Press the button. Select "Service" with the [Cursor] buttons ( F1 and F2 ) or the [Page] buttons ( F3 and F4 ), and press the button. Enter the current maintenance password (4 numerical digits). • Move cursor to the digit you want to change with the F1 or F2 button. • Set each number (0 through 9) with the F3 or F4 button. (Note: The initial maintenance password is "9999".) Then, press the button. Select "Check" with the F1 or F2 button, and press the button. Select "Request code" with the F1 or F2 button, and press the button. Set the Refrigerant address and Request code. • Select the item to be changed with the F1 or F2 button. • Select the required setting with the F3 or F4 button. Press the F3 or F4 button to set the Refrigerant address "0". Press the F3 or F4 button to set the desired request code No. • Rotation & Back up operation: Enter one request code from 311 to 318. • 2nd stage cut-in operation: Enter one request code from 321 to 324. Press the button. Data will be collected and displayed. Press the F3 or F4 button to set the Refrigerant address "1". Set above – . To return to the Main menu, press the button. To stop air conditioner, press the ON/OFF button. Press the TEST button for 3 seconds so that "Maintenance mode" appears on the screen (at A ).

A D 4 5 B C D C B 1 6 2 3 Refrigerant address Data display area Request code display area "00" (Refrigerant address) appears on the screen in a few minutes (at B). Press the button for 3 seconds to switch to [Maintenance monitor]. "---" appears on the screen (at D) when [Maintenance monitor] is activated. Press the [ ] buttons ( and ) to set the desired request code No. Rotation & Back up operation: Enter one request code from 311 to 318. 2nd stage cut-in operation: Enter one request code from 321 to 324. Press the button to perform data request. (The requested data will be displayed at C in the same way as in maintenance mode.) Press the [TEMP] buttons ( and ) to set the Refrigerant address 01. "01" (Refrigerant address) appears on the screen in a few minutes (at B). Set above – . To return to normal mode, press the ON/OFF button.

OCH492A 31

11 DISASSEMBLY PROCEDURE PCA-RP71HAQ PCA-RP125HAQ PCA-RP71HAQ-ER OPERATING PROCEDURE PHOTOS & ILLUSTRATIONS

1. Removing the oil filter (1) Slide the oil filter towards you to remove. (See Figure 1) 2. Removing the terminal block box cover (1) Remove the oil filter. (See Figure 1) (2) Remove a screw for terminal block box cover, and remove the terminal block box cover. (See Photo 1) Figure 1 Oil filter Photo 1 Slide Filter rails Fan guard Clamp for wiring 3. Removing the control box (1) Remove the oil filter. (See Figure 1) (2) Loosen the screw for control box cover to remove the control box cover. (See Photo 2) (3) Remove the lead wire from the 2 clips. (4) Remove the 2 white cord heater relay connectors (1P o 2) and 2 fan motor relay connectors (6P o 2) in the control Terminal block box Screw Photo 2 Terminal block box cover

box. (5) Remove the 2 screws for control box to slide the control box downward. Electrical parts in the control box • Fan motor capacitor • Indoor controller board • Power board OCH492A Screws for control box Screw for control box cover Photo 3 Cord heater relay connectors Power board Fan motor capacitors 32 Fan motor relay connectors Clips for lead wire Pipe temperature thermistor connector (CN21) Room temperature thermistor connector (CN20) Indoor controller board

OPERATING PROCEDURE PHOTOS & ILLUSTRATIONS

4. Removing the fan motor (1) Remove the oil filter. (See Figure 1) (2) Remove the control box cover. (See Photo 2) (3) Remove the room temperature thermistor connector (CN20) on the indoor controller board. (See Photo 3) (4) Remove a filter rail that is the nearest to the control box. (See Photo 4) (5) Remove the fan guard. (See Photo 5) (6) Remove the room temperature thermistor together with the holder at the right side of the casing. Photo 4 Screws for filter rail Photo 5 Control box Room Filter rail Room temperature thermistor Screws for Fan guard Fan guard Screws for Fan guard

5. Removing the fan motor and the sirocco fan (1) Remove the oil filter. (See Figure 1) cover Photo 6 temperature thermistor

(2) Remove the control box cover. (See Photo 2.) (3) Remove the fan motor relay connectors (6P) in the control box. (See Photo 3) (4) Remove the 3 filter rails. (See Photo 1, 4) (5) Remove the fan guard. (See Photo 5) (6) Remove the lower casing. (See Photo 6) (7) Remove the green earth wire from the motor support. (See Photo 7) (8) Remove the 2 screws (M5 × 12) for motor support, and remove the left and right motor supports. (9) Remove the fan motor together with the sirocco fan. (10) Remove the 2 set screws (M6) to separate the fan motor Screws for casing Screws for casing

from the sirocco fan. Control box cover Photo 7 Casing Earth wire Fan motor Casing Set screws

Screws for Sirocco fan Sirocco fan Motor

OCH492A 33 motor support support

OPERATING PROCEDURE PHOTOS

6. Removing the pipe temperature thermistor (1) Remove the oil filter. (See Figure 1) (2) Remove the fan guard. (See Photo 1) (3) Remove the terminal block box cover. (4) Remove the white relay connector (2P) in the terminal block box. (See Photo 8) (5) Remove the service panel. (See Photo 9) (6) Remove the pipe temperature thermistor from the holder. (See Photo 10) Caution for installation When installing the pipe temperature thermistor, slack off its lead wire as shown in the photo. Otherwise, water trickled down the lead wire may splash on the connector and this could cause a short circuit of the connector. Photo 8 Photo 9 Relay connector Terminal block box Service panel Screws for service panel

Photo 10 Inspection port

Pipe temperature thermistor Slack off

7. Removing the under panel (1) Remove the oil filter. (See Figure 1) (2) Remove the 3 filter rails. (See Photo 1, 4) (3) Remove the 12 screws (left: 1, right: 1, bottom: 10) for under panel, and remove the under panel. (See Photo 11) 8. Removing the drain pan (1) Remove the oil filter. (See Figure 1) (2) Remove the 3 filter rails. (See Photo 1, 4) (3) Remove the under panel. (See Photo 11) (4) Pull the blue lead wire for cord heater towards you to slack off. (See Photo 12) (5) Remove the 3 screws at the center of the drain pan, and remove the drain pan. Note: Remove the drain pan carefully since the drain could remain in it. OCH492A34 Photo 11 Screw for under panel (left: 1) Photo 12 Screw for under panel (right: 1) Under panel Screws for under panel (bottom: 10) Lead wire for cord heater Screws for drain pan Drain pan

OPERATING PROCEDURE PHOTOS

9. Removing the guide vane (1) Remove the oil filter. (See Figure 1) (2) Remove the 3 filter rails. (See Photo 1, 4) (3) Remove the under panel. (See Photo 11) (4) Remove the drain pan. (See Photo 12) (5) Remove the 3 screws (4 × 10) for guide vane, and remove the guide vane. (See Photo 13) Photo 13 Guide vanes

10. Removing the vane Drain pan Screws for guide vane

(1) Slide the vane to the center of the unit, and pull it towards you to remove. (See Photo 14) Caution for installation Photo 14 Vanes

When installing the vane, check that its projection is on the left-rear side. Projection Slide Slide

11. Removing the heat exchanger (1) Remove the oil filter. (See Figure 1) (2) Remove the 3 filter rails. (See Photo 1, 4) (3) Remove the under panel. (See Photo 11) (4) Remove the drain pan. (See Photo 12) (5) Remove the 2 screws (4 × 10) for pipe cover, and remove the pipe cover. (See Photo 15) (6) Remove the 3 screws (4 × 10, left: 2, right: 1) for heat exchanger. (See Photo 15, 16) (7) Remove the 2 screws (4 × 10) for heat exchanger at the top of the unit, and remove the heat exchanger. (See Photo 17) Photo 17 Heat exchanger Screws for Heat exchanger (top) Photo 15 Heat exchanger Heat exchanger Photo 16 Screws for Heat exchanger (left) Pipe cover Screw for heat exchanger (right) Screws for pipe cover

OCH492A 35

HEAD OFFICE : TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN

CCopyright 2010 MITSUBISHI ELECTRIC CORPORATION Distributed in Jul. 2014 No.OCH492 REVISED EDITION-A Distributed in Dec. 2010 No.OCH492 Made in Japan New publication, effective Jul. 2014 Specifications are subject to change without notice.


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