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Lessar air conditioners are equipped with an automatic troubleshooting function. Having detected a problem, the system issues an error code for the Lessar air conditioner on the front panel of the indoor unit. The error code is a special combination of flashing LEDs. An air conditioner error Lessar is displayed until measures are taken to eliminate it.
Error codes for Lessar air conditioners in cold mode
| Air conditioner Lessar | Diode Work | Diode Timer |
| For one minute, the indoor fan does not work | blinks | – |
| The power supply to the evaporator temperature sensor or the room temperature is interrupted | blinks | burns |
| Unacceptable voltage was applied to the compressor four times in a row | – | blinks |
| Less air conditioner error: central control board failure | blinks | blinks |
| ROM failure | burns | blinks |
Error codes for Lessar air conditioners in warm mode
| Air conditioner error Lessar | Diode Defrost | Diode Work | Diode Timer |
| An invalid voltage was applied to the compressor four times | blinks | blinks | – |
| Air conditioner error Lessar: for one minute the fan of the indoor unit does not work | blinks | – | blinks |
| No voltage or short circuit on the evaporator sensor | blinks | – | – |
| The power supply to the room temperature sensor is interrupted | – | – | blinks |
| Central Board Failure | – | blinks | blinks |
| ROM failure | – | burns | blinks |
What to do if, after power is supplied, the device does not turn on and no air conditioner error codes are lit Lessar:
- Verify fuse integrity;
- Make sure that 220 volts are supplied to the air conditioner. If there is no power transformer on the primary winding, the board of the indoor module should be replaced. If the voltage is normal, the secondary winding should be checked. If the result is positive, it is necessary to change the board of the internal module. If negative, make sure that there is 14.5 volts at the transformer output. If the answer is no, the transformer should be changed.
If, after power is supplied, the Operation indicator is off, the Timer indicator blinks:
- Put another control board. If this does not help, you should change the internal module board. If it helps, then the voltage is low in the network.
If the Work indicator is on, the Timer indicator is blinking, it means the EEPROM is faulty, to eliminate this error of the Lessar air conditioner, it is necessary to change the PCB board.
