Comfortstar AC Error Codes – Most Common Fault Messages

Comfortstar air conditioner error codes provide valuable information for users to identify and resolve issues in their air conditioning systems. These error codes are defined by the manufacturer to identify a specific error or malfunction in the air conditioner. Each error code indicates a particular problem and allows users to quickly diagnose the issue and find the correct solution.

Here are some common Comfortstar AC codes and troubleshooting steps.

Codes List

On, Off, cF, dF, SC, FP Codes

On: for 3 seconds when:

• TIMER ON is set
• FRESH, SWING, TURBO, or SILENCE features are turned on

OF: for 3 seconds when:

• TIMER OFF is set
• FRESH, SWING, TURBO, or SILENCE features are turned off

cF: when anti-cold air feature is turned on

dF: when defrosting

SC: when unit is self-cleaning

FP:  when freeze protection is turned on

Error code appears and begins with the letters as the following in the window display of indoor unit: E(x), P(x), F(x), EH(xx), EL(xx), EC(xx), PH(xx), PL(xx), PC(xx) : The unit may stop operation or continue to run safely. If the indicator lamps continue to flash or error codes appear, wait for about 10 minutes. The problem may resolve itself. If not, disconnect the power, then connect it again. Turn the unit on. If the problem persists, disconnect the power and contact your nearest customer service center.

Outdoor Unit Error Display

Troubleshooting

Common Issues

The following problems are not a malfunction and in most situations will not require repairs.

Issue: Unit does not turn on when pressing ON/OFF button

Possible Causes: The Unit has a 3-minute protection feature that prevents the unit from overloading. The unit cannot be restarted within three minutes of being turned off.

Issue: The unit changes from COOL/HEAT mode to FAN mode

Possible Causes:

1. The unit may change its setting to prevent frost from forming on the unit. Once the temperature increases, the unit will start operating in the previously selected mode again.
2. The set temperature has been reached, at which point the unit turns off the compressor. The unit will continue operating when the temperature fluctuates again.

Issue: The indoor unit emits white mist

Possible Causes: In humid regions, a large temperature difference between the room’s air and the conditioned air can cause white mist.

Issue: Both the indoor and outdoor units emit white mist

Possible Causes: When the unit restarts in HEAT mode after defrosting, white mist may be emitted due to moisture generated from the defrosting process.

Issue: The indoor unit makes noises

Possible Causes:

1. A rushing air sound may occur when the louver resets its position.
2. A squeaking sound may occur after running the unit in HEAT mode due to expansion and contraction of the unit’s plastic parts.

Issue: Both the indoor unit and outdoor unit make noises

Possible Causes:

1. Low hissing sound during operation: This is normal and is caused by refrigerant gas flowing through both indoor and outdoor units.
2. Low hissing sound when the system starts, has just stopped running, or is defrosting: This noise is normal and is caused by the refrigerant gas stopping or changing direction.
3. Squeaking sound: Normal expansion and contraction of plastic and metal parts caused by temperature changes during operation can cause squeaking noises.

Issue: The outdoor unit makes noises

Possible Causes: The unit will make different sounds based on its current operating mode.

Issue: Dust is emitted from either the indoor or outdoor unit

Possible Causes: The unit may accumulate dust during extended periods of non-use, which will be emitted when the unit is turned on. This can be mitigated by covering the unit during long periods of inactivity.

Issue: The unit emits a bad odor

Possible Causes:

1. The unit may absorb odors from the environment (such as furniture, cooking, cigarettes, etc.) which will be emitted during operations.
2. The unit’s filters have become moldy and should be cleaned.

Issue: The fan of the outdoor unit does not operate

Possible Causes: During operation, the fan speed is controlled to optimize product operation.

Issue: Operation is erratic, unpredictable, or unit is unresponsive

Possible Causes: Interference from cell phone towers and remote boosters may cause the unit to malfunction.

In this case, try the following:

1. Disconnect the power, then reconnect.
2. Press ON/OFF button on remote control to restart operation.

Problem: Poor Cooling Performance

Possible Causes:

1. Temperature setting may be higher than ambient room temperature
2. The heat exchanger on the indoor or outdoor unit is dirty
3. The air filter is dirty
4. The air inlet or outlet of either unit is blocked
5. Doors and windows are open
6. Excessive heat is generated by sunlight
7. Too many sources of heat in the room (people, computers, electronics, etc.)
8. Low refrigerant due to leak or long-term use
9. SILENCE function is activated

Solution:

1. Lower the temperature setting
2. Clean the affected heat exchanger
3. Remove the filter and clean it according to instructions
4. Turn the unit off, remove the obstruction and turn it back on
5. Make sure that all doors and windows are closed while operating the unit
6. Close windows and curtains during periods of high heat or bright sunshine
7. Reduce amount of heat sources
8. Check for leaks, re-seal if necessary and top off refrigerant
9. SILENCE function can lower product performance by reducing operating frequency. Turn off SILENCE function

Problem: The unit is not working

Possible Causes:

1. Power failure
2. The power is turned off
3. The fuse is burned out
4. Remote control batteries are dead
5. The Unit’s 3-minute protection has been activated
6. Timer is activated

Solution:

1. Wait for the power to be restored
2. Turn on the power
3. Replace the fuse
4. Replace batteries
5. Wait three minutes after restarting the unit
6. Turn timer off

Problem: The unit starts and stops frequently

Possible Causes:

1. There’s too much or too little refrigerant in the system
2. Incompressible gas or moisture has entered the system
3. The compressor is broken
4. The voltage is too high or too low

Solution:

1. Check for leaks and recharge the system with refrigerant
2. Evacuate and recharge the system with refrigerant
3. Replace the compressor
4. Install a manostat to regulate the voltage

Problem: Poor heating performance

Possible Causes:

1. The outdoor temperature is lower than 7°C (44.5°F)
2. Cold air is entering through doors and windows
3. Low refrigerant due to leak or long-term use

Solution:

1. Use auxiliary heating device
2. Make sure that all doors and windows are closed during use
3. Check for leaks, re-seal if necessary and top off refrigerant

NOTE: If your problem persists after performing the checks and diagnostics above, turn off your unit immediately and contact an authorized service center.

How to operate your unit without the remote control ?

In the event that your remote control fails to work, your unit can be operated manually with the MANUAL CONTROL button located on the indoor unit. Note that manual operation is not a long-term solution, and that operating the unit with your remote control is strongly recommended.

To operate your unit manually:

1. Open the front panel of the indoor unit.
2. Locate the MANUAL CONTROL button on the right-hand side of the unit.
3. Press the MANUAL CONTROL button one time to activate FORCED AUTO mode.
4. Press the MANUAL CONTROL again to activate FORCED COOLING mode.
5. Press the MANUAL CONTROL button a third time to turn the unit off.
6. Close the front panel.

Care and Maintenance

Cleaning Your Air Filter

A clogged air conditioner can reduce the cooling efficiency of your unit, and can also be bad for your health. Make sure to clean the filter once every two weeks.

1. Lift the front panel of the indoor unit.
2. Grip the tab on the end of the filter, push it up slightly, then pull it a little towards yourself.
3. Now pull down to extract the filter.
4. If your filter has a small air freshening filter, unclip it from the larger filter. Clean this air freshening filter with a hand-held vacuum.
5. Clean the large air filter with warm, soapy water. Be sure to use a mild detergent.
6. Rinse the filter with fresh water, then shake off excess water.
7. Dry it in a cool, dry place, and refrain from exposing it to direct sunlight.
8. When dry, re-clip the air freshening filter to the larger filter, then slide it back into the indoor unit.
9. Close the front panel of the indoor unit.

Manual Pdf

Comfortstar Air Conditioner Manual Pdf

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Danny Reese

HVAC Expert at acerrorcode.com

Regarding error and fault codes, we believe sharing knowledge is the best way to help everyone. That is why we established ACErrorCode.com, to give you every bit of info you need as a customer. HVAC Expert Contact: dannyreese@acerrorcode.com Call: 916-954-2677

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