Vaillant V 12-025 W User Manual - page 13
13
Split wall-mounted User Manual
EN
9 Troubleshooting
The table below describes a selection of problems with
their possible causes and solutions, see Table 9.1.
If these solutions do not solve the problem contact your
usual installer or call your nearest Vaillant office.
SYMPTOMS
POSSIBLE CAUSES
POSSIBLE SOLUTION
The system does not work at all (the
ventilation does not start)
The selector is set to "O" (stop)
Position the selector to "I" (start)
The unit is unplugged
plug the unit to the power supply
Power supply cut
Reconnect the power supply
The thermostat is set to an excessively high
temperature in Cooling mode or excessively
low temperature in Heating mode
Set the temperature correctly
The operating time is not set to ON
Set the time on the remote controller
The remote controller batteries have run out Replace the batteries
The fuse has blown
Consult after sales service
Continuous tripping of from the circuit
breaker or fuse
Consult after sales service
Very low line voltage
Consult your electrician
Insufficient cooling or heating
Doors and / or windows open
Close the doors and/or windows
Heat source nearby (e.g. lots of people in the room) If possible, remove the heat source.
The thermostat is set to an excessively high
temperature in cooling mode or excessively
low in heating mode
Set the temperature properly
Presence of an obstacle in front of the air
inlet or outlet in the indoor or outdoor unit
Remove the obstacle to allow the air to
circulate properly.
The ambient temperature has not reached
the designated level
Wait for a few moments
Dirty or blocked air filter
Clean the air filter
Power plug or cord excessively hot
Consult after sales service
Faulty insulation of power plug or cord
Consult after sales service
The operating unit interferes with the radio,
TV or other appliances
Consult after sales service
Abnormal noises of the unit
Cracking noises can be caused by the refrigerant
circulating inside the unit during operation
Cracking noises can be caused by heat expansion
or contraction of plastics when the unit is stopped
Consult after sales service
Odors come out from the unit
This can sometimes be caused by tobacco or
cosmetics smell sticked to the unit
The unit cannot be restarted just after
disconnecting
The compressor protection has been
activated for three minutes.
Wait three minutes before restarting the unit
Abnormal operation of the unit
Pull out the power plug and wait three minutes
before pulling it in again. Restart the unit.
Consult after sales service
Excessive or non-existent cooling or heating The operating mode (COOL/HEAT) is not selected Check the operating mode selected.
The air inlet or outlet on the indoor or
outdoor unit is obstructed.
Remove the obstacle causing the blockage
During the operation in DRY mode the air
does not flow
At times, when in DRY mode, the airflow
stops to prevent steam of dehumidified
moisture and to save energy.
mist comes out of the unit during the
operation in COOL mode
It can sometimes occur when the temperature
and the humidity level of the room are
very high. It will disappear by lowering the
temperature and the humidity level.
When running in HEAT mode there is no
airflow.
In HEAT mode the air does not flow until it is hot enough,
thereby avoiding a jet of cold air.
For the same reason, the air stream may not be variable.
The air does not blow for 6 to 12 minutes in
heating mode.
When the outdoor temperature is low
and the humidity level is high, the unit
automatically starts a defrosting process.
Please wait for the process to complete.
The LCD on the remote controller is blurred
or with all indicators showing
The remote controller batteries have run out Replace the batteries
The remote controller does not work
properly during the operation of the unit
Remote controller signals are not received
The remote controller is exposed to direct
sunlight or strong lighting. Remove the
light source source.
Consult after sales service
Table 9.1 Troubleshooting.
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Troubleshooting 9