You may have heard of a company with the name Mirc that started its manufacturing in 1981, but then it changed its name to Onida. In the beginning, the company used to manufacture and distribute washing machines, televisions, ovens, projectors, theaters, LED lights, and mobile phones. Now, Onida is a big and one of the top brands in India which are delivering its products all around the world. They are well known for their air conditioners because of the convenience that they bring.
Although the air conditioner includes a wide range of features and options, its self-diagnosis system is one of the greats. It displays a specific error code whenever your AC system is experiencing a problem. In this article, we have gathered all the error codes along with their causes and solutions. Always seek professional help whenever needed because tweaking electronics without proper knowledge or experience can have bad outcomes.
Onida air conditioner error code E1
Causes:
- This error indicates the high-pressure protection of the compressor.
- The compressor or the system is overheating.
- The system is telling the unit that there is too high pressure in the compressor.
Solutions:
- Turn OFF the air conditioner and let it rest for 15-30 minutes. Restart the system after it has cooled down completely.
- Check the air filters and ensure there isn’t anything causing blockages. Clean the air filters and if damaged, replace them.
- Verify that the temperature sensor on top of the compressor is fine. Replace it if it is faulty.
- Contact an installation engineer to check that the ductwork has minimum turns.
Onida air conditioner error code E2
Causes:
This is an indoor anti-frozen protection error that can occur when/if:
- Filters are clogged and the indoor evaporator is covered with dirt.
- The indoor motor is blocked.
- The refrigerant charge in the system is less than required.
- The ambient temperature of the indoor and outdoor units is less than normal.
Solutions:
- Clean the indoor air filters and evaporator to remove dust, dirt, or any other foreign items causing filter blockages.
- Increase the fan speed because the low ambient temperature can sometimes cause the AC system to activate the defrosting process.
- Verify that the indoor AC motor is rotating at its full capacity. If the motor speed is fluctuating or restricting, repair it or replace it as a whole.
- Check the refrigerant level and if it is low, get it charged with the assistance of an HVAC professional.
Onida air conditioner error code E3
Causes:
This is a low-temperature protection of the compressor error which can occur when/if:
- The outdoor unit cut-off valve is partially or completely closed.
- The low-pressure sensor on the compressor is malfunctioning.
- The fan of the indoor or outdoor unit is not working to its full capacity.
- The air filter piping of indoor unit is clogged.
- The ambient temperature of the AC unit is low.
- The refrigerant level is lower than required.
Solutions:
- Ensure that the liquid and gas valves of the outdoor unit are completely opened.
- Clean the air filters and system pipeline to remove any clogging or restrictions.
- Turn the fan speed to its maximum level and if the fan motor is malfunctioning, repair or replace it as needed.
- Inspect the pressure sensor of the unit and if it is faulty, replace it with a new one.
- Check the refrigerant level in the system and if it is less than required, get it filled.
Onida air conditioner error code E4
Causes:
This is a discharge temperature protection of the compressor error and can occur when/if:
- Cut-off valve or electronic expansion valve is closed or damaged.
- AC unit fans are not performing well.
- Air filters, system pipelines, or the ductwork of the indoor unit are clogged.
- The refrigerant charge is less than required.
Solutions:
- Verify that the cut-off valve is fully opened and the electronic expansion valve is perfectly connected to the PCB.
- Check if the environmental temperature is not compatible with the AC unit.
- Clean the ductwork, air filters, and pipeline to remove debris or other items causing blockages.
- Run fans at full capacity for at least a few minutes.
- Fill the freon gas if it is less.
Onida air conditioner error code E5
Causes:
This is a compressor overload protection error that occurs when/if:
- The power line supply voltages are fluctuating.
- The wiring or connections of the compressor are damaged or loose.
- The overload protection switch on the compressor is weak or malfunctioning.
Solutions:
- Using a meter, check the voltages or current and make sure it is within the normal range and is consistent.
- Check the wiring and connections of the compressor for any damages or looseness.
- Ensure the compressor is properly connected to the system.
- Inspect the overload protection switch and if it is faulty, replace it.
Onida air conditioner error code E6
Causes:
This error is triggered when AC detects malfunctioning in transmitting a signal or message. It can happen when/if:
- Communication wire between two units or different components is loose, incorrectly connected, or broken.
- The connected wire control quantity or the address is wrong in the system.
- The communication controller is not working.
Solutions:
- Check and ensure that the communication wire is properly connected to the control board of the outdoor unit and the wired controller of the indoor unit.
- Seek engineer assistance to ensure that the connected wired control quantity and address is correct and compatible with the system.
- Inspect the main PCBs of both indoor and outdoor units for any malfunctioning. Replace either of the PCBs if they are faulty.
Onida air conditioner error code E7
Causes:
This error is reported when/if:
- The indoor and outdoor units of the system are running in two different modes. (IDU on HEATING & ODU on COOLING or vice versa.)
Solutions:
- Through the settings or display, verify that the same mode is running in both indoor and outdoor units.
- Restart the AC system after putting the same modes on both units.
Onida air conditioner error code F0
Causes:
- This is an indication of the malfunction in the environmental temperature sensor of the indoor unit.
- The indoor environmental temperature sensor is bent or has an open or short circuit.
Solutions:
Contact a technician or an electrician to:
- Check the resistance coefficient of the sensor and if it is weak or not compatible with the system, replace it.
- Look through the wiring and connections between the sensor and the main PCB. Repair the wires and connectors if damaged or loose.
- Check the sensor itself for any malfunction. Replace the sensor if it is faulty.
- If the error persists, inspect the PCB for any faults. Replace the board if it is malfunctioning.
Onida air conditioner error code F1
Causes:
- There are some issues in the pan tube inlet or ambient temperature sensor of the indoor unit.
- The indoor ambient or pan tube inlet temperature sensor is bent or has an open or short circuit.
Solutions:
- Try the exact solutions as suggested for the Onida air conditioner “Error Code F0”.
Onida air conditioner error code F2
Causes:
- The pan tube middle temperature sensor of the indoor unit is not working properly.
- The indoor pan tube middle temperature sensor is bent or has an open or short circuit.
Solutions:
- Try the exact solutions as suggested for the Onida air conditioner “Error Code F0”.
Onida air conditioner error code F3
Causes:
- The pan tube outlet temperature sensor of the indoor unit is not operating.
- The indoor pan tube outlet temperature sensor is bent or has an open or short circuit.
Solutions:
- Try the exact solutions as suggested for the Onida air conditioner “Error Code F0”.
Onida air conditioner error code F4
Causes:
- Malfunction in the environmental temperature sensor of the outdoor unit.
- The outdoor environmental temperature sensor is bent or has an open or short circuit.
Solutions:
- Try the exact solutions as suggested for the Onida air conditioner “Error Code F0”.
Onida air conditioner error code F5
Causes:
- The pan tube inlet temperature sensor of the outdoor unit has some problems.
- The outdoor pan tube inlet temperature sensor is bent or has an open or short circuit.
Solutions:
- Try the exact solutions as suggested for the Onida air conditioner “Error Code F0”.
Onida air conditioner error code F6
Causes:
- Issues in the pan tube middle temperature sensor of the outdoor unit.
- The outdoor pan tube middle temperature sensor is bent or has an open or short circuit.
Solutions:
- Try the exact solutions as suggested for the Onida air conditioner “Error Code F0”.
Onida air conditioner error code F7
Causes:
- The pan tube outlet temperature sensor of the outdoor unit is not functioning properly.
- The outdoor pan tube outlet temperature sensor is bent or has an open or short circuit.
Solutions:
- Try the exact solutions as suggested for the Onida air conditioner “Error Code F0”.
Onida air conditioner error code F8
Causes:
- Malfunction in the (rated frequency) discharge temperature sensor 1.
- The AC unit discharge temperature sensor 1 (rated frequency) is bent or has an open or short circuit.
Solutions:
- Try the exact solutions as suggested for the Onida air conditioner “Error Code F0”.
Onida air conditioner error code F9
Causes:
- This is an indication of the malfunction in the (digital) discharge temperature sensor 2.
- The discharge temperature sensor 2 (digital) is bent or has an open or short circuit.
Solutions:
- Try the exact solutions as suggested for the Onida air conditioner “Error Code F0”.
Onida air conditioner error code FA
Causes:
- Abnormalities in the (rated frequency) greasy temperature sensor 1.
- The greasy temperature sensor 1 (rated frequency) is bent or has an open or short circuit.
Solutions:
- Try the exact solutions as suggested for the Onida air conditioner “Error Code F0”.
Onida air conditioner error code Fb
Causes:
- The greasy temperature sensor 2 (digital) is not functioning efficiently.
- The greasy temperature sensor 2 (digital) is bent or has an open or short circuit.
Solutions:
- Try the exact solutions as suggested for the Onida air conditioner “Error Code F0”.
Onida air conditioner error code FC
Causes:
- The high-pressure sensor of the AC unit is malfunctioning.
- The high-pressure sensor has an open or short circuit.
- The high-pressure sensor is bent.
Solutions:
- Try the exact solutions as suggested for the Onida air conditioner “Error Code F0”.
Onida air conditioner error code Fd
Causes:
- The low-pressure sensor is not operating correctly.
- The low-pressure sensor has detected open or short circuits.
- The sensor is bent or moved from its position.
Solutions:
- Try the exact solutions as suggested for the Onida air conditioner “Error Code F0”.
Miscellaneous Errors/Problems in Onida Air Conditioner
The connector jumper of the Onida air conditioner is malfunctioning
Causes & Solutions:
- Check and verify that the connector jumper is installed correctly and it is contacting the system properly.
- Check the main PCB for any malfunctioning and if it is faulty, take it out and install a new one.
The Onida air conditioner is not operating
Causes & Solutions:
- The system usually does not operate if you turn it ON right after turning it OFF.
- Wait as the compressor takes about 3 minutes to start again.
- This is a built-in scenario in all air conditioners to protect them from any short circuits or other failures.
The Onida air conditioner is emitting unusual odors
Causes & Solutions:
- The AC unit emits such odors if you have newly painted furniture or someone is smoking in the room.
- The unit takes that air in, processes it, and throws it back into the room.
- Contact an HVAC professional to thoroughly clean the AC system to remove dust and debris build-up.
The Onida air conditioner is emitting a water-flow noise
Causes & Solutions:
- This is just a normal sound of refrigerant gas flowing through the coils and different components of the AC unit.
The Onida air conditioner is emitting mist while in COOL mode
Causes & Solutions:
- Mist can come out of the unit in the COOL mode because of the high temperature and humidity in the room.
- Wait for a few minutes as the mist will be wiped out of the room and will stop coming out once the temperature is balanced in the room.
The Onida air conditioner is emitting cracking noise
Causes & Solutions:
- This is the noise that occurs because of friction caused by the contraction or expansions of AC unit parts.
- This can happen when/if you have suddenly changed the temperature.
- This is normal noise and there is nothing to worry about, in most cases.
The Onida air conditioner is unable to start up
Causes & Solutions:
- Check and verify that the power isn’t cut OFF.
- Check and make sure that the power plug is in good shape and not loose.
- Check the circuit protection device and make sure it isn’t tripped.
- Using a meter or with the assistance of a technician, check and verify if the system is facing higher or lower voltages.
- Verify that there isn’t any TIMER set on your AC. Reset the timer and restart the unit.
The Onida air conditioner is not providing enough cooling or heating
Causes & Solutions:
- Verify that the temperature settings are properly set and appropriate according to normal environmental temperature.
- Ensure that the air inlet and outlet are not clogged or restricted.
- Clean the air filters to remove dirt and items causing clogging.
- Ensure that the room door and windows are properly closed.
- Ensure that the indoor fan is operating at maximum speed.
- Ensure that nothing is inside the room that is producing heat such as a heater, candles, or a flame.
The remote control of the Onida air conditioner is not working
Causes & Solutions:
- Ensure there isn’t any electrical or magnetic interference that is disturbing the normal functioning of the remote control.
- Unplug the system and plug it back in after a few minutes.
- Make sure that the remote controller is within the detection range of the AC unit.
- Remove if an object or item is acting as a barrier between the signal receiver of the system and the remote controller.
- Check the battery and replace it if it is dead.
- The remote controller can be faulty and need replacement.
The indoor unit Onida air conditioner is leaking water
Causes & Solutions:
- This can happen if the humidity in the air or room is high.
- Condensate is flowing out of its range.
- The drain hose is loose or leaking.
The outdoor unit Onida air conditioner is leaking water
Causes & Solutions:
- This is water produced when AC is in COOL mode and condensation is occurring on the coils, connections, joints, and pipes of the unit.
- The system is under the defrost process and water is dripping out.
- The water or humidity on the heat exchanger is evaporating a bit and coming out during the HEAT mode.
- Just wait for a few minutes and then it will be released. If not, contact a technician as your system needs service.
The indoor unit of the Onida air conditioner is emitting noise
Causes & Solutions:
- This happens when the fan or the compressor relay of the system is changing the switch from ON and OFF and vice versa.
- This noise can be of refrigerant flowing in the opposite direction which usually happens at the initiation or end of the unit’s defrost process.
The indoor unit of the Onida air conditioner is not throwing air
Causes & Solutions:
- Check and verify that the AC system is not in DRY mode.
- In this mode, the indoor unit will stop throwing the air after some time for about 3-12 minutes.
- This is done so that the unit can prevent the condensate from being vaporized again.
The Onida air conditioner has moisture on the air outlet vent
Causes & Solutions:
This is not a factor of concern.
- This happens when AC is kept running for a long time while there is high humidity in the air.
- The humidity will be condensed after a long time, be transferred to the air outlet grill, and will start dripping.
