FREE ENGLISH MITSUBISHI ELECTRIC PEA-A12AA4 (01) PDF DOCUMENT.
FREE ENGLISH MITSUBISHI ELECTRIC PEA-A12AA4 (01) PDF USER GUIDE.
FREE ENGLISH MITSUBISHI ELECTRIC PEA-A12AA4 (01) PDF USER MANUAL.
FREE ENGLISH MITSUBISHI ELECTRIC PEA-A12AA4 (01) PDF OWNER GUIDE.
FREE ENGLISH MITSUBISHI ELECTRIC PEA-A12AA4 (01) PDF OWNER MANUAL.
FREE ENGLISH MITSUBISHI ELECTRIC PEA-A12AA4 (01) PDF REFERENCE GUIDE.
FREE ENGLISH MITSUBISHI ELECTRIC PEA-A12AA4 (01) PDF INSTRUCTION GUIDE.
FREE ENGLISH MITSUBISHI ELECTRIC PEA-A12AA4 (01) PDF REFERENCE MANUAL.
FREE ENGLISH MITSUBISHI ELECTRIC PEA-A12AA4 (01) PDF INSTRUCTION MANUAL.
FREE ENGLISH MITSUBISHI ELECTRIC PEA-A12AA4 (01) PDF OPERATING INSTRUCTIONS.
CLICK HERE TO DOWNLOAD MITSUBISHI ELECTRIC PEA-A12AA4 (01) PDF DOCUMENT
If this is not the document you want for this product, click here to see if we have any other documents for this product.
How to use the PDF below:
* Touchscreen: Swipe up/down with-in the PDF to scroll and pinch or spread with two fingers to zoom.
* Mouse: While your mouse is hovering over the PDF, use the mouse wheel to scroll and click on the – / + buttons at the bottom of the PDF to zoom.
What are the functions of the operation buttons on the wired remote controller for the MITSUBISHI ELECTRIC PEA-A12AA4?
Once the controls are set, the same operation mode can be repeated by simply pressing the ON/OFF button. The functions of the buttons are as follows:
- Start/Stop button: Turns the unit on or off.
- Set Temperature buttons (Up/Down): Adjusts the target temperature.
- Fan Speed button: Changes the fan speed.
- Mode button (Return button): Selects the operation mode (e.g., Cool, Heat).
- Timer Menu button (Monitor/Set button): Accesses timer settings.
- Set Time buttons (Back/Ahead): Adjusts time settings.
- Timer On/Off button (Set Day button): Turns the timer on or off.
- Filter button (<return sign> button): Resets the filter indicator.
- Test Run button: Initiates a test run operation.
- Service button (Clear button): Used for service and clearing errors.
- Airflow Up/Down button: Adjusts the airflow direction.
- Louver button (Operation button): Controls the louver operation.
- Ventilation button (Operation button): Controls the ventilation unit.
How do I interpret the display indicators on the wired remote controller for the MITSUBISHI ELECTRIC PEA-A12AA4?
The display on your MITSUBISHI ELECTRIC PEA-A12AA4 remote controller shows the following information:
- Identifies the current operation: Shows the operating mode, etc.
- Day-of-Week: Shows the current day of the week.
- Time/Timer Display: Shows the current time or the time remaining on the timer.
- “Sensor” indication: Displayed when the remote controller sensor is used.
- “Locked” indicator: Indicates that remote controller buttons have been locked.
- “Clean The Filter” indicator: Comes on when it is time to clean the filter.
- Timer indicators: The indicator comes on if the corresponding timer is set.
- Fan Speed indicator: Shows the selected fan speed.
- Ventilation indicator: Appears when the unit is running in Ventilation mode.
- (Power On indicator): Indicates that the power is on.
- Louver display: Indicates the action of the swing louver.
- Room Temperature display: Shows the room temperature.
- Up/Down Air Direction indicator: Shows the direction of the outcoming airflow.
- “Centrally Controlled” indicator: Indicates that operation has been prohibited by a master controller.
- “Timer Is Off” indicator: Indicates that the timer is off.
- Temperature Setting: Shows the target temperature.
What should I be aware of when using the remote controller for the MITSUBISHI ELECTRIC PEA-A12AA4?
Please note the following cautions when operating your MITSUBISHI ELECTRIC PEA-A12AA4:
- Only the Power on indicator lights when the unit is stopped and power is supplied to the unit.
- If you press a button for a feature that is not installed in the indoor unit, the remote controller will display the “Not Available” message. If you are using the remote controller to operate multiple indoor units, this message will appear only if the feature is not present at the parent unit.
- 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 disappears then start the operation.
What are the specifications for the MITSUBISHI ELECTRIC PEA-A12AA4 indoor unit?
What do the symbols on the wiring diagram for the MITSUBISHI ELECTRIC PEA-A12AA4 mean?
| SYMBOL | NAME | SYMBOL | NAME |
|---|---|---|---|
| I.B. | INDOOR CONTROLLER BOARD | SW1 | SWITCH (FOR MODEL SELECTION) |
| FUSE | FUSE AC250V 6.3A | SW2 | SWITCH (FOR CAPACITY CODE) |
| X1 | AUX. RELAY | SW6 | SWITCH (FOR EMERGENCY OPERATION) |
| CN2L | CONNECTOR (LOSSNAY) | SWE | CONNECTOR (EMERGENCY OPERATION) |
| CN24 | CONNECTOR (BACK-UP HEATING) | TH1 | INTAKE AIR TEMP. THERMISTOR |
| CN30 | CONNECTOR (LLC) | TH2 | PIPE TEMP. THERMISTOR/LIQUID |
| CN32 | CONNECTOR (REMOTE SWITCH) | TH5 | COND./EVA. TEMP. THERMISTOR |
| CN41 | CONNECTOR (HA TERMINAL-A) | FS | FLOAT SWITCH |
| CN51 | CONNECTOR (CENTRALLY CONTROL) | TB4 | TERMINAL BLOCK (INDOOR/OUTDOOR CONNECTING LINE) |
| CN90 | CONNECTOR (WIRELESS) | TB15 | TERMINAL BLOCK (REMOTE CONTROLLER TRANSMISSION LINE) |
| CN105 | CONNECTOR (RADIO FREQUENCY INTERFACE) | W.B. | IR WIRELESS REMOTE CONTROLLER BOARD (OPTIONAL) |
| LED1 | POWER SUPPLY (I.B.) | RU | RECEIVING UNIT (OPTIONAL) |
| LED2 | POWER SUPPLY (I.B.) | BZ1 | BUZZER (OPTIONAL) |
| LED3 | TRANSMISSION (INDOOR-OUTDOOR) | RFI | RADIO FREQUENCY INTERFACE FOR RF THERMOSTAT |
How is the optional field-installed heater controlled on the MITSUBISHI ELECTRIC PEA-A12AA4?
The optional heater for the MITSUBISHI ELECTRIC PEA-A12AA4 is controlled based on the following function settings. You can select the desired pattern by setting the Function on the indoor unit.
| Mode | Setting | Mode no. | Setting | Initial setting |
|---|---|---|---|---|
| Heater control |
Heater OFF: Inlet air temp. ≥ set temp. Heater ON: Inlet air temp. < set temp.-4.5°F(2.5°C) The fan will stop and the heater will turn off when [DEFROST] or [ERROR] is displayed. |
23 | 1 | ○ |
|
Heater OFF: Inlet air temp. ≥ set temp. Heater ON: Inlet air temp. < set temp.-4.5°F(2.5°C) The fan will drive and the heater will turn on when [DEFROST] or [ERROR] is displayed. |
23 | 2 | – |
How does the fan on the MITSUBISHI ELECTRIC PEA-A12AA4 operate when an optional heater is installed?
By setting Mode No. 23 in the Function Table and using the optional parts PAC-YU25HT, the fan control pattern changes when [DEFROST] or [ERROR] is displayed.
Fan control patterns when [DEFROST] or [ERROR] is displayed
| Use of CN4Y (PAC-YU25HT) | Heater is installed in the duct. | No heater is installed in the duct. |
|---|---|---|
| Heater is off. | Unused* | Used |
| Heater is on. | Fan ON*1 | Fan OFF |
*If a heater is installed in the duct, do not use CN4Y. By doing so, the fan will turn off when the heater is on, which may result in fire.
*1 Fan speed setting
| Mode | Setting | Mode no. | Setting | Initial setting | |
|---|---|---|---|---|---|
| Heating Thermo-OFF | [DEFROST] or [ERROR] | ||||
| Fan control | Very low | Very low | 25 | 1 | ○ |
| STOP | Remote controller setting | 25 | 2 | – | |
| Remote controller setting | Remote controller setting | 25 | 3 | – | |
What are the wiring restrictions for the optional PAC-YU25HT heater adapter for the MITSUBISHI ELECTRIC PEA-A12AA4?
When installing the optional PAC-YU25HT heater adapter, please follow these wiring restrictions:
- Relay X specifications: Rated voltage: 12VDC, Power consumption: 0.9W or less. Use the diode that is recommended by the relay manufacturer at both ends of the relay coil.
- Cable length: The length of the electrical wiring for the PAC-YU25HT is 2 meters (6-1/2 ft.). To extend this length, use sheathed 2-core cable (Type: CVV, CVS, CPEV or equivalent; Size: 0.5 mm² ~ 1.25 mm² or 16 to 22 AWG). Do not extend the cable more than 10 meters (32ft).
- Keep the length of the cable connecting to the circuit board of the indoor unit shorter than 10 meters (32ft). Longer cables could cause improper operation.
- Use a transit relay when extending wiring such as remote wiring.
What precautions should I take before troubleshooting my MITSUBISHI ELECTRIC PEA-A12AA4?
(1) Before troubleshooting, check the followings:
Check the power supply voltage.
Check the indoor/outdoor connecting wire for mis-wiring.
(2) Take care of the followings during servicing:
Before servicing the air conditioner, be sure to turn off the remote controller first to stop the main unit, and then turn off the breaker.
When removing the indoor controller board, hold the edge of the board with care NOT to apply stress on the components.
When connecting or disconnecting the connectors, hold the housing of the connector. DO NOT pull the lead wires.
How do I perform a self-check on the MITSUBISHI ELECTRIC PEA-A12AA4 using the wired remote controller?
To run the self-check function on your MITSUBISHI ELECTRIC PEA-A12AA4, follow these steps:
1. Turn on the power.
2. Press the [CHECK] button twice.
3. Set the refrigerant address with the [TEMP] button if system control is used.
4. Press the [ON/OFF] button to stop the self-check.
The display will show the CHECK button, the Indoor Unit’s Refrigerant address, the TEMP button, the unit type (IC: Indoor unit, OC: Outdoor unit), the Check code, and the Indoor Unit No.
What do the self-check codes on the MITSUBISHI ELECTRIC PEA-A12AA4 remote controller mean?
| Check code | Symptom | Remark |
|---|---|---|
| P1 | Intake sensor error | For details, check the LED display of the outdoor controller board. As for outdoor unit, refer to service manual OC322. |
| P2 | Pipe (TH2) sensor error | |
| P9 | Pipe (TH5) sensor error | |
| E6, E7 | Indoor/outdoor unit communication error | |
| P4 | Drain sensor error | |
| P5 | Drain pump error | |
| P6 | Freezing/Overheating protection operation | |
| EE | Communication error between indoor and outdoor units | |
| P8 | Pipe temperature error | |
| E0, E3~E5 | Remote controller transmission error | |
| E1, E2 | Remote controller control board error | |
| Fb | Indoor unit control system error (memory error, etc.) | |
| E9 | Indoor/outdoor unit communication error (Transmitting error) (Outdoor unit) | |
| UP | Compressor overcurrent interruption | |
| U3,U4 | Open/short of outdoor unit thermistors | |
| UF | Compressor overcurrent interruption (When compressor locked) | |
| U2 | Abnormal high discharging temperature/49C worked/insufficient refrigerant | |
| U1,Ud | Abnormal high pressure (63H worked)/Overheating protection operation | |
| U5 | Abnormal temperature of heat sink | |
| U8 | Outdoor unit fan safeguard stop | |
| U6 | Compressor overcurrent interruption/Abnormal of power module | |
| U7 | Abnormality of super heat due to low discharge temperature | |
| U9,UH | Abnormality such as overvoltage or voltage shortage and abnormal synchronous signal to main circuit /Current sensor error | |
| Others | Other errors (Refer to the technical manual for the outdoor unit.) |
What should I do if the MITSUBISHI ELECTRIC PEA-A12AA4 remote displays “PLEASE WAIT” or an error code upon startup?
If the unit cannot be operated properly after a test run, refer to the following table to identify the cause.
| Wired remote controller Symptom | Cause |
|---|---|
| PLEASE WAIT (For about 2 minutes after power-on) | For about 2 minutes after power-on, operation of the remote controller is not possible due to system start-up. (Correct operation) |
| PLEASE WAIT → Error code (After about 2 minutes has expired after power-on) |
|
| Display messages do not appear even when operation switch is turned ON (operation lamp does not light up). |
|
Note: Operation is not possible for about 30 seconds after cancellation of function selection. (Correct operation)
What do the LEDs on the indoor controller board of the MITSUBISHI ELECTRIC PEA-A12AA4 indicate?
| LED1 (power for microcomputer) | Indicates whether control power is supplied. Make sure that this LED is always lit. |
| LED2 (power for remote controller) | Indicates whether power is supplied to the remote controller. This LED lights only in the case of the indoor unit which is connected to the outdoor unit refrigerant address “0”. |
| LED3 (communication between indoor and outdoor units) | Indicates state of communication between the indoor and outdoor units. Make sure that this LED is always blinking. |
How does the Auto Restart Function work on the MITSUBISHI ELECTRIC PEA-A12AA4?
The MITSUBISHI ELECTRIC PEA-A12AA4 is equipped with the AUTO RESTART FUNCTION. When the indoor unit is controlled with the remote controller, the operation mode, set temperature, and fan speed are memorized by the indoor controller board. The auto restart function activates the moment power is restored after a power failure, and the unit will automatically restart with the previous settings.
How do I troubleshoot self-diagnosis error codes for the MITSUBISHI ELECTRIC PEA-A12AA4?
Refer to the table below for countermeasures for specific error codes on your MITSUBISHI ELECTRIC PEA-A12AA4.
| Error Code | Abnormal point and detection method | Cause | Countermeasure |
|---|---|---|---|
| P1 | Room temperature thermistor (TH1) Constantly detected during cooling, drying, and heating. |
Defective thermistor, contact failure of connector (CN20), breaking of wire, defective indoor controller board. | Check resistance value of thermistor. Check contact failure of connector (CN20). Check room temperature display on remote controller. |
| P2 | Pipe temperature thermistor/Liquid (TH2) Constantly detected during cooling, drying, and heating. |
Defective thermistor, contact failure of connector (CN44), breaking of wire, defective refrigerant circuit, defective indoor controller board. | Check resistance value of thermistor. Check contact failure of connector (CN44). Check pipe temperature with remote controller. |
| P4 | Contact failure of drain float switch (CN4F) Detected when the connector is disconnected and not short-circuited. |
Contact failure of connector (insert failure), defective indoor controller board. | Check contact failure of float switch connector. Operate with connector (CN4F) short-circuited. Replace board if abnormality reappears. |
| P5 | Drain overflow protection operation Detected if float switch is underwater for 1 min 30 sec continuously with drain pump on. |
Malfunction of drain pump, defective drain, clogged drain pump/pipe, defective drain float switch, defective indoor-controller board. | Check if drain-up machine works. Check drain function. Remove and check float switch connector CN4F. |
| P6 | Freezing/overheating protection is working Detected if pipe temp is out of range for a set duration. |
(Cooling) Clogged filter, short cycle, low-load operation. (Heating) Clogged filter, short cycle, over-load operation. Defective indoor/outdoor fan motor or control. | (Cooling/Heating) Check clogging of the filter. Remove shields. Refer to 7-7 for DC Fan motor check. Check outdoor fan motor and refrigerant circuit condition. |
| P8 | Pipe temperature Detected if pipe temperature is not in the correct range after compressor start. |
Slight temperature difference, shortage of refrigerant, disconnected thermistor holder, defective refrigerant circuit, converse pipe/wire connection, defective thermistor, stop valve not opened. | Check pipe/condenser temperature with remote controller. Check for converse pipe/wire connection. |
| P9 | Abnormality of pipe temperature thermistor / Condenser-Evaporator (TH5) Constantly detected during operation. |
Defective thermistor, contact failure of connector (CN44), breaking of wire, defective refrigerant circuit, defective indoor controller board. | Check resistance value of thermistor. Check contact failure of connector (CN44). Operate in test run mode and check pipe temperature. |
| E0, E4 | Remote controller transmission/receiving error Controller cannot receive/transmit data for a set time. |
Contact failure of transmission wire, all controllers set to “sub”, mis-wiring, defective controller or indoor board circuit, noise. | Check for loose wires. Set one controller to “main”. Check wiring. Diagnose remote controllers. |
| E3, E5 | Remote controller transmission/receiving error Controller cannot find transmission path or receives different data. |
Two controllers set as “main”, controller connected to multiple units, repetition of refrigerant address, defective controller/board circuit, noise. | Set one controller to “main”. Ensure controller connects to one indoor unit. Check address setting. Diagnose remote controller. |
| E6 | Indoor/outdoor unit communication error (Signal receiving error) Indoor board cannot receive signal for a set time. |
Contact failure, short circuit, or mis-wiring of connecting wire. Defective transmitting/receiving circuit. Noise. | Check LED on outdoor board. Check for loose connecting wire. Turn power off and on. If persists, replace board. |
| E7 | Indoor/outdoor unit communication error (Transmitting error) “1” receiving is detected 30 times continuously though board transmitted “0”. |
Defective transmitting circuit of indoor board, noise in power supply or outdoor control wire. | Turn power off and on. If persists, replace indoor controller board. |
| Fb | Indoor controller board Data cannot be read normally from nonvolatile memory. |
Defective indoor controller board. | Replace indoor controller board. |
| E1, E2 | Remote controller control board Data cannot be read from memory or clock function is inoperable. |
Defective remote controller. | Replace remote controller. |
| PA (2500) | Water leakage Detected during operation other than cooling and dry. |
Mis-piping, mis-wiring, detection failure of thermistor, drain pump failure, drainage failure, drain float switch failure. | Check extension pipes for mis-piping. Check connecting wire. Check room/pipe temperature display. Check drain-up machine and function. Check drain float switch. |
What does it mean if LED2 on the indoor controller board of my MITSUBISHI ELECTRIC PEA-A12AA4 is off or blinking?
| Phenomena | Cause | Countermeasure |
|---|---|---|
| (1)LED2 on indoor controller board is off. | When LED1 on indoor controller board is also off. Power supply of rated voltage is not supplied to outdoor unit. | Check the voltage of outdoor power supply terminal block. If AC 208-230V is not detected, check power wiring and breaker. |
| Defective outdoor controller circuit board | Check the voltage between outdoor terminal block S1 and S2. If not detected, check fuse on outdoor board. | |
| Power supply of 208-230V is not supplied to indoor unit. | Check the voltage between indoor terminal block S1 and S2. If not detected, check indoor/outdoor connecting wire for mis-wiring. | |
| Defective indoor controller board | Check the fuse on the indoor controller board. Check wiring connection. If no problems are found, the board is defective. | |
| (2)LED2 on indoor controller board is blinking. | When LED1 on indoor controller board is also blinking. Connection failure of indoor/outdoor unit connecting wire. | Check indoor/outdoor unit connecting wire for connection failure. |
| When LED1 is lit. Mis-wiring of remote controller wires. Under twin triple indoor unit system, 2 or more indoor units are wired together. | Check the connection of remote controller wires. When 2 or more indoor units are wired in one system, connect remote controller wires to only one of those units. | |
| Refrigerant address for outdoor unit is wrong or not set. Under grouping control, there are some units whose refrigerant address is 0. | Check the setting of refrigerant address. If there are multiple units with address 0 in one group, set one of the units to 0 using SW1 (3-6) on the outdoor controller circuit board. | |
| Short-out of remote controller wires. Defective remote controller. | Remove remote controller wires and check LED2. If LED2 is still blinking, check for a short-circuit. If LED2 is lit, reconnect wires; if it blinks again, the controller is defective. |
How do I test the thermistors on the MITSUBISHI ELECTRIC PEA-A12AA4?
To check the thermistors (TH1 Room temperature, TH2 Pipe temperature, TH5 Condenser/evaporator temperature) on your MITSUBISHI ELECTRIC PEA-A12AA4, follow this procedure:
Measure the resistance with a tester. The part temperature should be between 10°C(50°F) and 30°C(86°F).
- Normal: Resistance reading is between 8kΩ and 20kΩ.
- Abnormal: The thermistor is opened or short-circuited.
How do I troubleshoot the DC fan motor on the MITSUBISHI ELECTRIC PEA-A12AA4?
If the indoor fan on your MITSUBISHI ELECTRIC PEA-A12AA4 will not turn, follow these steps. Note: High voltage is applied to the fan motor connector (CNMF). Do not pull out the connector with the power supply on.
1. Check the fuse (FUSE) on the indoor controller board.
2. If the fuse is blown, check the drain pump (DP) resistance. If resistance is not normal, replace the drain pump. If it is normal, replace the indoor controller board (I.B) and the fan motor (MF).
3. If the fuse is not blown, check the wiring contact of the fan motor connector (CNMF). If there is a contact failure, perform a wiring recovery.
4. If there is no contact failure, remove the connector (CNMF) and perform a power supply check. Measure the voltage on the indoor controller circuit board:
– TEST POINT ①: VDC between pin 1 (+) and 4 (-) of the fan connector should be DC294-340V.
– TEST POINT ②: Vcc between pin 5 (+) and 4 (-) of the fan connector should be DC15V.
5. If the voltage is not normal, replace the indoor controller board.
6. If the voltage is normal, replace the fan motor.
7. After replacing the fan motor, check the operation of the fan. If it is still not working (NG), replace the indoor controller board.
How do I disassemble the MITSUBISHI ELECTRIC PEA-A12AA4 for service?
Exercise caution when removing heavy parts.
1. Control box
(1) Remove the two fixing screws on the control box cover (A) to remove it.
2. Thermistor (Intake air)
(1) After removing the control box cover, pull out the thermistor holder (B) and thermistor (C) on the control box.
3. Drainpan
(1) Drain the water out of the drain pan before removing it.
(2) Push up the tab on the filter and pull it out.
(3) Remove the fixing screws on the bottom plate (D), (E) to remove it. To avoid dew condensation, use insulated screws in the marked places when reassembling.
(4) Pull out the drain pan in the direction of the arrow.
4. Thermistor (Condenser / evaporator) (Liquid pipe)
(1) Remove the drain pan as described above.
(2) Remove the four fixing screws on the heat exchanger cover (F) to remove it.
(3) Remove the thermistor (G) from the thermistor holder (H) on the copper tube.
5. Fan and fan motor
(1) Push down the tab on the filter and pull it out.
(2) Remove the fixing screws on the bottom plate (J) to remove it.
(3) Squeeze the tabs on the fan casing to remove the bottom half.
(4) Remove the motor cable through the rubber bush.
(5) Remove the two motor fixing screws to remove the motor and the Sirocco fan.
(6) Remove the four fan case fixing screws to take the top half of the fan casing off.
6. Bearing [PEA-A18AA(4), (6) model only]
(1) Remove the two fixing screws on the bearing cover (K) to remove it.
(2) Remove the two bearing retainer screws to remove the bearing.
7. Heat exchanger
(1) Remove the drain pan and heat exchanger cover as described in previous sections.
(2) Remove the two fixing screws on the cover (L) to remove it.
(3) Remove the fixing screws on the heat exchanger (M) to remove it.
CLICK HERE TO DOWNLOAD MITSUBISHI ELECTRIC PEA-A12AA4 (01) PDF DOCUMENT