Troubleshooting; Faults With Indication (Self Diagnosis Functionself Diagnosis Function); Faults Not Indicated; Possible Cause - Buderus Logacool AC166i MS Bedienungsanleitung Für Den Betreiber

5

Troubleshooting

▶ Check all cables and connect the power supply.
▶ If required, make sure that the air filter is installed.
5 Troubleshooting
5.1 Faults with indication (Self diagnosis functionSelf
diagnosis function)
If a fault occurs during operation, the LEDs flash for an extended period
or an error code is displayed (e.g. EH 02).
5.2

Faults not indicated

If faults occur during operation that cannot be eliminated:
▶ Call customer service about the fault, providing details of the device.
Fault
The output of the indoor unit is too low.
Indoor unit does not switch on.
Operating mode changes from Cooling or Heating
to Fan Mode.
A white mist is coming from the indoor unit.
White mist is emerging from the indoor unit and
outdoor unit.
There is noise coming from the indoor unit and
outdoor unit.
Dust is being discharged from the indoor unit or
outdoor unit.
Unpleasant odour during operation.
The fan of the outdoor unit is not running
continuously.
Operation is irregular or unpredictable or the
indoor unit is not responding.
Air baffle or louvres do not run correctly.
Table 20
16
If a fault is present for more than 10 minutes:
▶ Briefly disconnect the power supply and switch the indoor unit back
on.
If a fault persists:
▶ Call customer service and provide the fault code and details of the
appliance.

Possible cause

Temperature is set too high or too low.
Air filter is soiled and must be cleaned.
Unfavourable ambient conditions for the indoor unit, e.g. the ventilation openings of the devices are
obstructed, doors/windows in the room are open or the room contains powerful heat sources.
Low-noise operation is activated and prevents the full output from being used.
The indoor unit has a safety mechanism to prevent overloading. It may take 3 minutes , until the
indoor unit can be restarted.
The batteries of the remote control are empty.
The timer is switched on.
The indoor unit changes operating mode to prevent the formation of frost.
The set temperature is reached provisionally.
In humid regions, white mist may appear if there is a significant temperature difference between the
indoor air and air-conditioned air.
If heating mode is activated directly after automatic defrosting, this can generate white mist due to
the higher level of humidity.
A quiet hissing noise is normal during operation. This is caused by the flow of refrigerant.
Creaks and squeaks may be heard, as the metal and plastic parts of the device expand or contract
during heating/cooling.
The outdoor unit also emits a range of other noises during operation which is normal.
Dust may accumulate in the devices if they are shut down for an extended period and not covered.
Unpleasant odours in the air may enter the devices and spread.
There may be mould on the air filter and it must therefore be cleaned.
Variable fan control is used to ensure optimum operation.
The indoor unit may be affected by interference from mobile radio masts or external signal
amplifiers.
▶ Switch the power supply off and back on again.
Air baffle or louvres have been adjusted manually or have not been correctly installed.
▶ Switch the power supply off and check whether the components are engaged correctly.
▶ Switch the power supply back on again.
Logacool AC166i MS – 6721849825 (2023/03)