CARRIER TRANSICOLD AIRV 68RV15103A (01) PDF Document

The following general safety notices supplement the specific warnings and cautions appearing elsewhere in this manual. They are recommended precautions that must be understood and applied during operation and maintenance of the equipment covered herein.

FIRST AID

An injury, no matter how slight, should never go unattended. Always obtain first aid or medical attention immediately.

OPERATING PRECAUTIONS

Always wear safety glasses.

Keep hands clear of the evaporator blower and condenser fan.

No work should be performed on the unit until all circuit breakers and start-stop switches are turned off, and power supply is disconnected.

Always work in pairs. Never work alone.

In case of severe vibration or unusual noise, stop the unit and investigate.

MAINTENANCE PRECAUTIONS

Beware of unannounced starting of the evaporator blower & condenser fan. Do not remove the ceiling grill assembly or the upper unit cover assembly before turning the power off, and disconnecting the power supply. Before disconnecting, discharge capacitors by shorting across the capacitors terminals.

When disassembling wiring, use numbered stickers to identify wire leads and terminals. This aids in quick, accurate reassembly.

Be sure power is turned off before working on motors, controllers, or electrical control switches. Tag any circuit breakers and power supply to prevent accidental energizing of circuits.

Do not bypass any electrical safety devices, e.g. bridging an overload, or using any sort of jumper wires. Problems with the system should be diagnosed and any necessary repairs must be performed by qualified service personnel.

In case of electrical fire, open circuit switch and extinguish with CO2 (never use water).

Use dry nitrogen to pressurize the system for leak checking. Be careful not to exceed 150 psig test pressure in the hermetic compressor.

Coil fins are sharp. Use care when removing the cover form the base pan to avoid personal injury.

Oil vapor in piping stubs can ignite from torch flame and cause serious injury. Exercise extreme care when brazing, and keep brazing cloth and fire extinguisher handy for emergency use.

Disconnect power to the AirV unit before checking the capacitor.

MODEL NUMBER	PART NUMBER	CONFIGURATION	VOLTAGE	AMPS	COLOR
LOW PROFILE 68RV15103A	99-00468-10	FREE-BLOW HIGH CAPACITY	115/1/60	14.1 COOL 13.8 HEAT	WHITE
LOW PROFILE 68RV15103A	99-00468-32	FREE-BLOW HIGH CAPACITY	115/1/60	14.1 COOL 13.8 HEAT	BLACK

MODEL NUMBER	PART NUMBER	VOLTAGE	COLOR	OPTIONS	INTERFACE
68RV0010AA	99-00469-00	115/1/60	White	Cool Only	Free-Blow
68RV0010AA	99-00469-01	115/1/60	Ivory	Cool Only	Free-Blow
68RV0010BA	99-00469-02	115/1/60	White	Heat/Cool	Free-Blow
68RV0010BA	99-00469-03	115/1/60	Ivory	Heat/Cool	Free-Blow
68RV0010KA	99-00469-06	115/1/60 (12VDC)	White	Cool Only	Ducted
68RV0030AA	99-00469-04	220/1/50	White	Cool Only	Free-Blow
68RV0030AA	99-00469-05	220/1/50	Ivory	Cool Only	Free-Blow
68RV0030BA	99-00469-08	220/1/50	White	Heat/Cool	Free-Blow
68RV0030KA	99-00469-10	220/1/50	White	Cool Only	Ducted
68RV0012CA	99-00469-11	115/1/60	White	Heat Pump	Free-Blow
68RV0012CA	99-00469-12	115/1/60	Ivory	Heat Pump	Free-Blow
68RV0011LA	99-00469-13	115/1/60 (12VDC)	White	Heat Pump	Ducted
68RV0010EA	99-00469-17	115/1/60 (12VDC)	White	Heat/Cool	Free-Blow Wall Thermostat
68RV0040MA	99-00469-22	115/1/60	White	Cool Only	Ducted Wall Thermostat
68RV0010AB (Phased Out)	99-00469-23	115/1/60	White	Cool Only	Free-Blow
68RV0010AB (Phased Out)	99-00469-24	115/1/60	Ivory	Cool Only	Free-Blow
68RV0010BB (Phased Out)	99-00469-25	115/1/60	White	Heat/Cool	Free-Blow
68RV0010BB (Phased Out)	99-00469-26	115/1/60	Ivory	Heat/Cool	Free-Blow
68RV0010DB	99-00469-29	115/1/60	White	Cool Only	Free-Blow Wall Thermostat
68RV0010EB	99-00469-31	115/1/60	White	Heat/Cool	Free-Blow Wall Thermostat
68RV0012FB	99-00469-33	115/1/60	White	Heat Pump	Free-Blow Wall Thermostat
68RV0010KS	99-00469-35	115/1/60	White	Cool Only Thick Roof Kit	Ducted Remote
68RV0011KS	99-00469-36	115/1/60	White	Heat Pump Thick Roof Kit	Ducted Remote
68RV0010MS (Phased Out)	99-00469-37	115/1/60	White	Cool Only Thick Roof Kit	Ducted W/Wall Sensor
68RV0011OS (Phased Out)	99-00469-38	115/1/60	White	Heat Pump Thick Roof Kit	Ducted W/Wall Sensor

Refrigerant Charge

Low Profile (All): R-22 – 16.9 Ounces

Compressor – 115 Volts, 60 Cycles, 1 Phase

Note: AirV Compressor mounting bolts must be torqued 15/17 ft./lbs.

1. Locked Rotor Amps – Low Profile High Capacity: 59.0 AMPS

2. Fully Loaded Amps – Low Profile: Cooling – Approx. 13.4 AMPS, Heating – Approx. 13.8 AMPS

Thermostat Range (All Free Blow Units)

61° F (16° C) to 89° F (32° C)

Return Air Sensor (Thermistor)

The Return-Air-Sensor (Thermistor) is part of the PCB Main Assembly. The sensor has a yellow coating and protrudes about 3/16 inch thru the ceiling panel when installed.

Heat Pump Sensors (Thermistors)

The Heat Pump systems have a (ODA) outdoor air thermistor and a (ODC) outdoor coil thermistor, both located in the upper unit and a (IDC) indoor coil thermistor located in the ceiling unit.

This operation effectively eliminates moisture by operating the compressor and fan motor intermittently, so that the room temperature is maintained at set temperature. The compressor will be “on” for 5 minutes, then “off” for 5 minutes. The system fan motor will operate on low speed. The unit determines Dry Mode by sensing Room Temperature every 5 minutes (a 3 minute minimum operation of the compressor is not applied).

The cooling cycle is energized when the thermostat calls for cooling. The main components are the compressor, air-cooled condenser coil, strainer, capillary tube, evaporator coil, and accumulator.

1. The compressor raises the pressure and temperature of the refrigerant and forces it into the condenser coil.

2. The condenser fan circulates surrounding air over the outside of the coil tubes. Heat transfers from the refrigerant to the air, causing the refrigerant to liquefy.

3. Liquid refrigerant flows through a strainer (which removes impurities) to the capillary tube.

4. The capillary tube meters the flow of liquid refrigerant to the evaporator coil, reducing its pressure and temperature.

5. The evaporator blower pulls vehicle air through filters and then through the evaporator coil.

6. The cold liquid refrigerant in the evaporator coil tubes absorbs heat from the vehicle air. This cools the air, which is then circulated into the vehicle interior.

7. The heat absorption causes the refrigerant to vaporize. This low-pressure vapor passes into the accumulator, which ensures only vapor refrigerant is returned to the compressor to repeat the cycle.

The cooling cycle is energized when the thermostat calls for cooling. The system controls are positioned for “normal” refrigerant flow. The main components are the compressor, reversing valve, air-cooled outdoor coil, strainer, capillary tube, indoor coil, and the accumulator.

1. The compressor raises the pressure and temperature of the refrigerant and forces it through the reversing valve into the outdoor coil.

2. The outdoor fan circulates air over the coil, removing heat from the refrigerant and causing it to liquefy.

3. Liquid refrigerant flows through the strainer to the capillary tube, which meters the flow to the indoor coil, reducing its pressure and temperature.

4. The indoor blower pulls inside air through filters and across the indoor coil.

5. The cold refrigerant in the indoor coil absorbs heat from the air, cooling the air that is circulated into the vehicle.

6. This heat absorption vaporizes the refrigerant. The low-pressure vapor then passes into the accumulator, which ensures only vapor returns to the compressor to repeat the cycle.

The heating cycle is energized when the thermostat calls for heat. The system controls are positioned for “reverse” refrigerant flow. The main components are the compressor, reversing valve, indoor coil, capillary tube, strainer, air-cooled outdoor coil, and the accumulator.

1. The compressor raises the pressure and temperature of the refrigerant and forces it through the reversing valve into the indoor coil.

2. The indoor blower pulls inside air through the filters and passes it over the indoor coil.

3. The hot refrigerant gas inside the indoor coil transfers heat to the vehicle air. This removal of heat causes the refrigerant to liquefy.

4. The liquid refrigerant flows through the strainer to the outdoor coil via the capillary tube, which reduces its pressure and temperature.

5. The low-temperature liquid in the outdoor coil absorbs heat from the outdoor air that is circulated over the tubes, causing the liquid to vaporize.

6. This low-pressure vapor passes into the accumulator, which ensures only vapor refrigerant is returned to the compressor, where the cycle repeats.

The system has locked out due to “Compressor Circuit” being interrupted for an abnormal reason during operation. This can be caused by a power interruption or voltage drop (Brown-Out). The electronics monitor the voltage to the unit and will lock-out for safety. To ‘re-set”, disconnect the 12 VDC from the electronic controls for 15 seconds and re-connect. If the alarm returns, check the 115 VAC with an amp meter to determine if the unit amp draw (with compressor and fan running) is within specifications according to the unit model.

Check to see if the filters are clean. Once cleaned, take the temperature of the air going into the filters and compare it to the air temperature coming out of the unit (If ducted, take the reading as close as possible to the unit air outlet). The temperature difference (Delta-T) should be 20 to 25 degrees. This test requires the interior temperature to be warm enough to provide a good heat load. If the interior temperature is cold, the temperature drop may not be as high as 20 to 25 degrees. If the temperature drop is not as described, take an amp draw on the unit’s 115 VAC and compare to the correct model specifications.

There is a temperature sensor probe that should be inserted into the indoor (evaporator) coil at the time of installation. It needs to see a temperature drop within 5 minutes of compressor start up to confirm proper operation. Check to see if the probe has been inserted into the coil and if it is properly positioned. The probe is 2.5 to 3 inches in length with 2 brown wires.

When the remote control was developed, it was done using the Celsius scale. When converted to Fahrenheit, it will stage in 2-degree (F) increments most times, and occasionally a 1-degree increment. This is normal and cannot be changed.

Initially, the lowest set point for furnace mode was 63 degrees. Starting with ceiling unit serial numbers after 4204Y, the furnace setpoint was lowered to 45 degrees. The first two numbers in the serial number relate to the week of the year manufactured; the 3rd and 4th digits relate to the year. For example, 4204Y was manufactured in the 42nd week of 2004.

The manual control Thermostat on a freeblow ceiling unit is 61 to 89 degrees F.

Yes, the Freeblow unit is designed to have the fan run continuously.

The blinking red light indicates that 12 VDC is installed and powered to the unit controls. If there is no light blinking, the unit controls will not operate the 115 VAC equipment.

No, wall mounted thermostats are only available for Freeblow and Ducted Cool Only units.

Each unit should have a dedicated 20 Amp (12 gauge wire with ground) protected circuit.

Not necessarily. Heat strips manufactured after 3507Y are equipped with a manual reset overload protector. Remove required components to access the electrical connections at the heat strip assembly. On the back of the overload protector there is a “RED” reset button. Push the button in until it clicks to reset. If no reset button is present, the unit was manufactured prior to 3507Y. Check the element for an open circuit or a resistance value of 9 Ohms.

The temperature is sensed at the ceiling unit, not at the remote control. The temperature offset can be even more with RV’s with higher ceilings. This is more common in heat mode, as warm air rises.

Symptom and Probable Cause	Probable Remedy
NO POWER TO UNIT
1. Master switch off	1. Reset master switch
2. Open circuit breaker	2. Reset circuit breaker
3. Defective wiring	3. Replace wiring
4. Loose electrical connections	4. Tighten connections
5. Faulty switches, thermostat, or fan	5. Replace defective components
6. 12 VDC not connected (Ducted System)	6. Connect to 12 VDC power source
7. 12 VDC in-line fuse open (Ducted)	7. Replace fuse
DUCTED UNIT WILL NOT OPERATE
1. Display not illuminated	1. Check 12 Volt DC in-line fuse
2. Display illuminated	2. Check 115 Volt AC Connections
DUCTED UNIT WILL NOT COOL
1. Green LED light flashes 5 times	1. Check 115 volt AC power source. Momentarily disconnect 12 VDC power source. Disable compressor malfunction test switch. Check AMP draw. Check ΔT.
2. Unit cools for a few moments then stops cooling	2. Remove grill, verify evaporator coil probe is inserted into coil. Check AMP draw. Check ΔT. Replace unit.
COMPRESSOR POWER SUPPLY OPEN
1. Loose leads at compressor terminals	1. Tighten leads
2. Defective motor overload switch	2. Replace switch
3. Defective capacitor	3. Replace capacitor
4. Open compressor windings	4. Replace compressor
5. Seized compressor	5. Replace compressor
6. Capacitor incorrectly wired	6. Verify capacitor wiring (Refer to wiring diagram)
COMPRESSOR RUNS BUT CYCLES, FAN OPERATING ERRATICALLY
1. Loose lead at fan motor	1. Tighten lead.
2. Defective or burned out motor	2. Replace motor.
3. Outdoor air restricted or recirculating	3. Check for dirty condenser coil, proper clearance around unit, remove any obstructions.
4. Overcharge or noncondensables in system	4. Check AMP draw
5. Restricted discharge line	5. Check for obstruction in line. Check ΔT. Replace unit.
6. Defective motor overload switch	6. Replace switch.
CYCLES ON COMPRESSOR OVERLOAD
1. Defective run capacitor	1. Replace capacitor
2. Defective compressor bearings or valves	2. Replace unit.
3. Greatly restricted evaporator air, iced evaporator coil.	3. Defrost evaporator coil.
4. Low refrigerant charge	4. Replace unit.
5. Evaporator capillary restricted	5. Replace unit.
6. Liquid line restricted	6. Replace unit.
7. Compressor hot	7. Verify refrigerant charge. Check AMP draw. Check ΔT.
8. Weak or inconsistent line power	8. Check line voltage at time of compressor start-up.
INSUFFICIENT COOLING, COOLING AIR NOT ADEQUATE
1. Dirty evaporator coil	1. Clean as required.
2. Iced evaporator coil, slightly low refrigerant charge	2. Defrost or Recharge.
3. Improper fan operation	3. Verify fan rotation (Refer to wiring diagram)
4. Defective fan motor	4. Replace fan motor.
5. Return air filter is dirty	5. Remove and clean filters.
CONDENSER AIR NOT ADEQUATE
1. Outside Air Restricted	1. Check for obstruction at coil. Remedy as required.
2. Dirty coil	2. Clean coil.
3. Defective fan motor	3. Replace fan motor.
INSUFFICIENT COOLING
1. Unit undersized	1. Re-evaluate unit for proper capacity.
2. Capillary restricted	2. Check AMP draw. Check ΔT. Replace unit.
COMPRESSOR FLOODING
1. Unit overcharged	1. Check AMP draw. Check ΔT. Replace unit.
2. Low evaporator airflow	2. Clean filter and/or evaporator coil.
3. Defective electrical connections	3. Check connections per wiring diagram and tighten any loose connections.
HEATER CYCLES ON LIMIT SWITCH (HEAT/COOL VERSION ONLY)
1. Dirty filter	1. Clean or replace filter.
2. Blocked evaporator air inlet (indoor)	2. Remove blockage.
3. Low airflow due to fan motor speed	3. Check fan motor. Repair or replace as necessary.
AIR SWEEP NOT WORKING (FREE BLOW VERSION ONLY)
1. Ceiling grill not properly aligned	1. Align ceiling grill.
2. Linkage in upper control box stuck	2. Align and lubricate linkage.
3. Air sweep motor failure	3. Replace motor.
WATER LEAKAGE
1. Water dripping from ceiling unit.	1. Verify vehicle is level. Tighten unit mounting bolts evenly or replace unit gasket.
INADEQUATE HEAT (FREE-BLOW HEAT ONLY)
1. No heat from heat strip.	1. Verify AMP draw (13.8 AMP). Verify resistance through heating element. (9 OHM). Check bi-metal switch. If open, replace switch.
INADEQUATE HEAT (HEAT-PUMP)
NOTE: Allow unit to operate 15 minutes after switching from cooling mode.
1. Reversing valve not operating	1. Check for 115 volts at reversing valve coil. Check for reversing valve restriction. Verify compressor operation.
2. Outdoor coil icing.	2. Check outdoor coil sensor.

When a repair has been accomplished due to a corresponding alarm, the alarm must be cleared. This is done by disconnecting the 12 VDC power to the ducted ceiling assembly for one or two seconds. Once the 12 VDC power is reconnected, the alarm should have been cleared.

NOTE: If more than two errors occur, the highest ranked code is displayed. If the highest ranked error is cleared, the next highest ranked error code is displayed.

Flashes	Error Codes (Priority)	Error Contents (Malfunction)	Allowed Modes
2	1	ROOM AIR THERMISTOR FAILURE	FAN Mode
3	2	INDOOR COIL THERMISTOR FAILURE	FAN Mode, FURNACE Mode
4	3	OUTDOOR COIL THERMISTOR FAILURE	FAN Mode, FURNACE Mode
5	4	COMPRESSOR DRIVE MALFUNCTION	FAN Mode, FURNACE Mode
6	5	REVERSING VALVE DRIVE MALFUNCTION	FAN Mode, FURNACE Mode
1	6	DISCHARGE AIR THERMISTOR FAILURE	FAN Mode, FURNACE Mode
Continuous	7	THERMISTOR WIRING WRONG (only in cooling test mode)	FAN Mode

Cleaning: Clean evaporator coil and condenser coil. Hold a flashlight behind the coil to see if all spaces are clear. Dust accumulation obstructs or reduces airflow. Both coils may be vacuumed when dry or brushed with a stiff brush and then blown out with compressed air. Thoroughly clean the base pan, motors, fan wheels, and other components. Clean the cover and ceiling grill with mild detergents.

Painting: Paint any parts that show evidence of rust with a good rust-prevention paint.

Wiring: Check all wiring for deterioration and all electrical contacts for tightness or corrosion.

Mounting: Make sure the unit is secure on the roof according to installation instructions. Check fans to ensure they are correctly positioned and tight on the shaft.

Leaks: Check any connections that show evidence of oil or leaks. Check gaskets for possible air leakage.

Controls: Check the unit to ensure all controls are functioning correctly and unit operation is normal. Vibrations can cause unwanted noise. Check to ensure that piping is not vibrating against the side of the unit.

The filters are located in the ceiling grill. To remove the filters, do the following:

a. Grasp the edge of the filter at the recess in the end of the ceiling grill.

b. Pull the filter completely out of the filter slot.

c. Vacuum the filter or wash it in lukewarm water. Shake off excess water and dry thoroughly.

d. Replace the filter by sliding it into the filter slot in the ceiling grill until the filter frame is flush with the interior grill.

Filter Removal

a. Grasp the edge of the filter at the recess in the end of the ceiling grill.

b. Pull filter completely out of the filter slot.

c. Vacuum filter or wash filter in luke-warm water. Shake off excess water and dry thoroughly.

d. Replace filter by sliding the filter into the filter slot in the ceiling grill until the filter frame is flush with the interior grill.

Ceiling Grill Removal

a. Before working on the unit, place the master switch in the OFF position and disconnect all electrical power.

b. Remove filters.

c. Remove 4 screws located on the ceiling grill (two are under the filters), making sure to support the weight of the grill.

d. Lower the ceiling grill from the ceiling panel.

e. To replace, place the grill up against the ceiling panel, align the screw holes, and replace the 4 screws and 2 filters.

Control Box Assembly Removal

a. Remove ceiling grill.

b. Disconnect 115 volt (AC) and 12 volt (DC) power wires.

c. Remove two screws securing the control box cover to the control box assembly and remove the cover.

d. Disconnect blue furnace wires.

e. Unplug two connectors from the upper unit.

f. Unplug the DC power plug and the relay signal plug.

g. While supporting the control box assembly, remove two screws securing it to the ducted ceiling unit.

h. Pull the control box assembly from the ducted ceiling unit.

i. Reverse the above procedure to reassemble.

Dip SW No.	FJ# On PCB	Functions	Logic=Low (FJ Open)	Logic=High (FJ Close)	Default (Factory Setting)
1	FJ1	Address Configuration	DCCA	DCCB	DCCA
2	FJ2	Compressor drive malfunction test	Enabled	Disabled	Enabled
3	FJ3	ODAT conditions for SLO mode	Cooler	Warmer	Cooler
4	FJ4	System limited operation mode (HP)	Enabled	Disabled	Enabled
5	FJ5	Defrost operation mode (Heat Pump)	Enabled	Disabled	Enabled

System Limited Operation Mode (SLO Mode) according to Outdoor Air Temperature (ODAT)

System Limited Operation Mode	FJ3 Selection (Cooler – Warmer)
	Cooler	Warmer
Start Conditions (Furnace Mode)	Less than or equal to 4° C (39.2° F)	Less than or equal to 7° C (44.6° F)
Release Conditions (Heat Pump Mode)	Greater than or equal to 6° C (42.8° F)	Greater than or equal to 9° C (48.2° F)

To check the resistance:

1. Remove 4 screws from the ceiling cover.

2. Remove 3 screws holding the PCB cover.

3. Un-plug the thermistor plug from the PC board.

4. Check thermistor resistance. Refer to the table below.

Resistance-Temperature Coefficient

° C	° F	Resistance (K-Ohms)	° C	° F	Resistance (Ohms)
5	41.0	12.07	25	77.0	5.369
6	43.0	11.57	26	78.5	5.168
7	44.5	11.09	27	80.0	4.976
8	46.5	10.63	28	82.5	4.792
9	48.0	10.19	29	84.0	4.616
10	50.0	9.771	30	86.0	4.447
11	52.0	9.373	31	87.5	4.286
12	53.5	8.993	32	89.5	4.131
13	55.5	8.631	33	91.5	3.982
14	57.0	8.286	34	93.0	3.840
15	59.0	7.956	35	95.0	3.703
16	61.0	7.641	36	96.5	3.573
17	62.5	7.341	37	98.5	3.447
18	64.5	7.054	38	100.5	3.326
19	66.0	6.779	39	102.0	3.211
20	68.0	6.517	40	104.0	3.100
21	69.5	6.267	41	105.5	2.993
22	71.5	6.027	42	107.5	2.890
23	73.5	5.798	43	109.5	2.792
24	75.0	5.579	44	111.0	2.698

On Heat Pump Systems, the IDC (InDoor Coil Thermistor) is in the ceiling unit. The ODA (OutDoor Air Thermistor) and the ODC (OutDoor Coil Thermistor) are in the Upper Unit. To check the resistance, refer to the table below.

Resistance-Temperature Coefficient (IDC – ODA – ODC)

° C	° F	Resistance (K-Ohms)	° C	° F	Resistance (Ohms)
0	32.0	32.62	36	97.0	6.27
1	34.0	31.00	37	99.0	6.02
2	36.0	29.48	38	100.0	5.78
3	37.0	28.03	39	102.0	5.55
4	39.0	26.67	40	104.0	5.33
5	41.0	25.38	41	106.0	5.12
6	43.0	24.16	42	108.0	4.92
7	45.0	23.01	43	109.0	4.73
8	46.0	21.91	44	111.0	4.55
9	48.0	20.88	45	113.0	4.37
10	50.0	19.90	46	115.0	4.20
11	52.0	18.97	47	117.0	4.04
12	54.0	18.09	48	118.0	3.89
13	55.0	17.25	49	120.0	3.75
14	57.0	16.46	50	122.0	3.61
15	59.0	15.71	51	124.0	3.47
16	61.0	15.00	52	126.0	3.34
17	63.0	14.32	53	127.0	3.22
18	64.0	13.68	54	129.0	3.10
19	66.0	13.07	55	131.0	2.99
20	68.0	12.49	56	133.0	2.88
21	70.0	11.94	57	135.0	2.78
22	72.0	11.42	58	136.0	2.68
23	73.0	10.92	59	138.0	2.58
24	75.0	10.45	60	140.0	2.49
25	77.0	10.00	61	142.0	2.41
26	79.0	9.57	62	144.0	2.32
27	81.0	9.17	63	145.0	2.24
28	82.0	8.78	64	147.0	2.16
29	84.0	8.41	65	149.0	2.09
30	86.0	8.06	66	151.0	2.02
31	88.0	7.72	67	153.0	1.95
32	90.0	7.40	68	154.0	1.88
33	91.0	7.10	69	156.0	1.82
34	93.0	6.90	70	158.0	1.76
35	95.0	6.53	71	160.0	1.70

WARNING: Disconnect power to the AirV unit before checking the capacitor.

Capacitors must be discharged properly before testing.

a. Place a 20,000 ohm, 2 watt resistor across the terminals of the capacitor for approximately 30 seconds. WARNING: Do not touch the metal of the screwdriver when discharging the capacitor. You could receive a shock.

b. After the capacitor has been discharged and all wires removed, use an ohmmeter to test its resistance.

c. Set the scale to R x 1K or 10K ohm and place the ohmmeter leads across the capacitor terminals.

d. If the ohmmeter first reads 0, then rises toward infinity or some higher resistance, the capacitor is good.

e. If the ohmmeter goes to 0 or a low resistance and stays there, the capacitor is shorted and needs to be replaced.

f. If the ohmmeter reads infinity (OL), the capacitor is open and needs to be replaced.

To determine a capacitor’s capacitance, a capacitor meter is required. Capacitors showing signs of leaks or bulging should be replaced immediately.

a. Disconnect power from the AirV unit.

b. Disconnect the wires to the PTC.

c. Using an ohm meter, check for continuity across the PTC. If the PTC does not have continuity, it must be replaced. If continuity exists, reconnect the wires to the PTC.

d. Reconnect power to the AirV unit.

e. Turn on the AirV unit to start.

f. Use a clamp-on amp probe to monitor the amp draw of the compressor during its start-up. When the compressor starts, an amp draw will be indicated for almost a second. If no amp draw is indicated or if the amp draw occurs for much longer than a second, the PTC is defective and must be replaced.

Line voltage should be checked during peak electrical load periods. With the AirV unit on and the compressor operating, use a voltmeter to check the voltage being supplied to the unit. The voltage must be within 10% of the unit’s required voltage. A voltage drop greater than 10% will cause a premature compressor failure and needs to be corrected immediately.

Exterior Cover Removal

a. Before working on unit place the master switch in the OFF position and disconnect all electrical power.

b. Remove (8) screws securing the unit cover to the base pan assembly.

c. Carefully lift the exterior cover off of the unit base pan assembly.

d. Reverse above procedure for reassembly.

Upper Scroll Assembly Removal

a. Remove exterior cover assembly.

b. Release the (2) front, (2) rear, (1) left side and (1) right side locking tabs by pulling back on the tabs.

c. Remove the screw (1) from the control box cover.

d. With all (6) locking tabs released and control box screw removed, lift the upper scroll assembly off of the lower scroll assembly.

e. Reverse above procedure for reassembly. Ensure all (6) locking tabs snap shut & lock.

Condenser Fan Assembly Removal

a. Perform steps to remove the upper scroll assembly.

b. Depress and remove the Retaining Ring.

c. Using both hands, carefully pull up on the fan assembly until it is free of the motor shaft.

d. When replacing, make sure the fan assembly is against the stop on the shaft.

e. Push back on the tab to allow the fan assembly to rest against the stop. The fan assembly will now be flush with the end of the motor shaft.

f. Reverse above procedure for reassembly.

Condenser Motor Removal

a. Perform steps to remove the upper scroll assembly.

b. Remove (3) 13MM bolts.

c. Remove (3) Grommets. Inspect, replace or reuse.

d. Cut and discard Tie-Wraps (2 locations). When re-assembling, tie-wrap at the same 2 locations.

e. Remove ground wire from the compressor bracket.

f. Un-plug (yellow/brown/white) from the control box assembly.

g. Reverse above procedure for reassembly.

CAUTION: The change from Fahrenheit to Celsius will be permanent. It cannot be changed back to Fahrenheit.

a. Remove the batteries from the remote control.

b. Carefully remove the remote cover by inserting a narrow flat object between the cover and remote body and prying apart.

c. Remove the brass screw holding the PCB in place.

d. Carefully remove the PCB board from the remote body, making sure the battery springs release from their holders.

e. Locate FR9 on the PCB board.

f. Carefully cut the FR9 jumper wire.

g. Reverse above procedure for reassembly. CAUTION: When re-assembling, ensure the battery springs are correctly placed in the battery spring holders.

Thermostat Location

The thermostat should be mounted approximately 5 feet (1.5m) from the floor, on an inside partitioning wall without pipes or duct work, and in a frequently used room. It should NOT be mounted near a window, outside wall, door, in direct sunlight or heat, near air registers, or in areas with poor air circulation.

Installation

a. Turn off all power to the unit.

b. If replacing an old thermostat, disconnect wires one at a time, recording the wire color and terminal marking for each.

c. Separate the front and back pieces of the new thermostat.

d. Route wires through the hole in the back piece, level it against the wall, and mark the two mounting holes.

e. Drill two 3/16 inch mounting holes.

f. Secure the back piece to the wall with the provided anchors and screws.

g. Connect wires to the proper terminals on the front piece.

h. Push any excess wire back into the wall and seal the hole to prevent air leaks.

i. Snap the front and back pieces together.

j. Turn on power to the unit.

Set Thermostat Configuration

Enter and hold the FAN button for approximately 10 seconds until the display reads A. You are now in configuration mode. Options include: A – Anticipator Value, d – Fahrenheit/Celsius Selection, oF – Room Temperature Offset. Use UP/DOWN buttons to select an option and MODE button to change its value.

Check Thermostat Operation (Cool Only)

1. Press FAN button for low speed, again for high speed, and a third time to turn it off.

2. Press MODE button until COOL is displayed. Press DOWN button until the readout is 10 degrees below room temperature. The cooling and high fan system should begin to operate within 5 minutes.

Timer Functions and Error Messages

The thermostat has a 3-minute timeguard on compressor start-up, a 15-minute cycle timer, and a 2-minute minimum on timer. An ‘E4’ error indicates internal memory failure (replace thermostat). Two dashes (–) indicate a room temperature reading failure (replace thermostat).