The Carrier air conditioners are so reliable and durable that it is extremely complex to break this apparatus even having a great desire. In this forces majeure circumstances, the Сarrier air conditioner troubleshooting system will help you to find and correct any breakdown. Do not doubt of your power and possibilities. Refer to this useful system. Simply follow the instruction. Determine those cases, when can you cope with the problem yourself and those ones, which require someone experienced.
Carrier Window Room Air Conditioner Error Codes and troubleshooting
|Unit does not start||1. Blown fuse|
2. Circuit breaker tripped
3. Unit cord unplugged
4. Supply volt age too low.
|1. Replace only once.
2. Reset only once .
3. Replug into wall recept acle
4. Consult electrician.
|Unit does not cool |
|1. Air filter dirty|
2. Improper thermost at setting.
3. Unit on dry mode.
4. Unit on sleep mode.
5. Check if the air conditioner is
exposed to sunlight.
|1. Clean the air filter .
2. Reset to desired temperature setting.
3. Press cool button.
4. Press sleep button.
5. Provide an awning.
|Fan motor does |
|1. Check whether fan hitting |
cowling or foreign material.
2. Check fan motor bearing.
|1. Adjust fan position or remove the
2. Replace fan motor .
|Ice or frost forms |
on indoor coil
|1. Low out side temperature.|
2. Air filter dirty.
3. Check system for leak.
4. Check thermostat.
|1.Operate the fan without cooling until
the frost disappears.
2. Clean the air filter .
3. Rep air and recharge.
4.Replace thermost at if defective.
into the room
|1. Outer wrapper not tilted properly|
on the outside.
2. Drain hole clogged.
|1. Tilt the outer wrapper by maximum of
2. Clean drain hole.
|E5||Coil thermistor problem||Check coil thermistor|
|E4||Room thermistor problem||Check room thermistor|
|E3||Unrecoverable loss of E2RAM data||Shut down the unit and restart.|
|E2||Loss or corruption of stored data||Using remote control, go to Cool mode
and shut down the system, & then restart
|E1||Code validation check fail||Shut down the unit and rest art|
|FL||Filter check warning||Press the ‘mode” and “ “ (down) buttons simultaneously for 3-5 sec.|
Carrier air conditioner İ-Cool Series troubleshooting
|Unit does not start||1 . Blown fuse 2. Circuit breaker tripped 3, Unit cord unplugged 4, Supply voltage too low.||1. Replace only once. 2. Reset only once. 3. Replug into wall receptacle. 4. Consult electrician.
|Unit does not cool properly||1. Air filter dirty. 2. Improper thermostat setting. 3. Unit on dry mode. 4. Unit on sleep mode. 5. Check if air conditioner is exposed to sunlight.||1. Clean air filter. 2. Reset to desired temperature setting. 3. Press cool button. 4. Press sleep button. 5. Provide an awning.
|Fan motor does not run||1, The fan maybe hitting cowling or foreign mat'l. 2. Check fan motor bearing.||1 . Adjust fan position or remove the foreign material. 2. Replace fan motor.
|Ice of frost forms on the indoor coil||1 . Low outside temperature. 2. Air filter dirty. 3. Check system for leak. 4. Check thermostat.||1 . Operate the fan w/o cooling until the frost disappears. 2. Clean air filter. 3. Repair and recharge. 4. Replace thermostat if defective.
|Water dripping into the room||1. Outer wrapper not tilted properly on the outside. 2, Drain hole clogged.||1, Tilt the outer wrapper by 10mm, max 2. Clean drain hole.
|rE||Room sensor is open or short circuit.||Replace with new sensor.|
|Fr||Freeze fail function is activated.||Check filter; refrigerant leak.
Turn off main power & restart the unit
|CF||Cooling fail action is activated.||Check compressor operation.
Turn off main power & restart the unit.
|rd||Run-hour deactivated.||Activate run-hour feature.|
|--||Cycle mode is activated.||None. Wait for the normal display.|
|X10 LED blinking||Reset the run-hour counter timer.|
|Timer light indicator blinking||Filter clean warning||Check filter.
Turn off main power & restart the unit.
Carrier Puron air conditioner troubleshooting
|UNIT DOES NOT START|
|• Unit may have become unplugged||• Check that plug is securely in wall receptacle.|
|• Fuse may have blown||• Replace the fuse.|
|• Circuit breaker may have been tripped||• Reset circuit breaker.|
|• Unit mode dial may be set to the OFF position||• Switch mode dial to an operating mode.|
|UNIT NOT COOLING/HEATING ROOM|
|• Unit air discharge section is blocked||• Make sure that curtains, blinds or furniture are not restricting or blocking unit airflow.|
|• Temperature setting is not high or low enough||• Reset to a lower or higher temperature setting.|
|• Unit air filters are dirty||• Remove and clean filters.|
|• Room is excessively hot or cold when unit is started||• Allow sufficient amount of time for unit to heat or cool the room. Start heating or cooling early before outdoor temperature, cooking heat or gatherings of people make room uncomfortable.|
|• Vent door left open||• Close vent door.|
|UNIT MAKING NOISES||• Clicking, gurgling and whooshing noises are normal during operation of unit.|
|WATER DRIPPING OUTSIDE||• If a drain kit has not been installed, condensation run-off during very hot and humid weather is normal. If a drain kit has been installed and is connected to a drain system, check gaskets and fittings around drain for leaks and plugs.|
|WATER DRIPPING INSIDE|
|• Wall sleeve is not installed level||• Wall sleeve must be installed level for proper drainage of condensation. Check that installation is level and make any necessary adjustments.|
|ICE OR FROST FORMS ON INDOOR COIL|
|• Low outdoor temperature||• When outdoor temperature is approximately 55 F or below, frost may form on the indoor coil when unit is in Cooling mode. Switch unit to FAN operation until ice or frost melts.|
|• Dirty filters||• Remove and clean filters.|
Carrier V RV air conditioner troubleshooting
|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 A T|
|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 A T. 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 A T. 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 A T.|
|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.|
|1. Unit undersized||1. Re-evaluate unit for proper capacity.|
|2. Capillary restricted||2. Check AMP draw. Check A T. Replace unit.|
|1. Unit overcharged||1. Check AMP draw. Check A T. 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.|
|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)|
|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|
Alpha Carrier air conditioner troubleshooting
|Malfunctions||Cause||What should be done?|
|Unit does not start||Power cut||Wait for power to be restored.|
|Unit may have become unplugged.||Check that plug is securely in wall receptacle.|
|Fuse may have blown.||Replace the fuse.|
|Battery in Remote controller may have been exhausted.||Replace the battery.|
|The time you have set with timer is incorrect.||Wait or cancel timer setting.|
|Unit not cooling or heating (Cooling/ heating models only) room very well while air flowing out from the air conditioner||Inappropriate temperature setting.||Set temperature correctly. For detailed method please refer to "Using remote control" section.|
|Air filter is blocked.||Clean the air filter.|
|Doors or Windows are open.||Close the doors or windows.|
|Air inlet or outlet of indoor or outdoor unit has been blocked.||Clear obstructions away first, then restart the unit.|
|Compressor 3 minutes protection has been activated.||Wait.|