Pioneer WYT Inverter Series Installation & User Manual page 41

Troubleshooting
MALFUNCTION
If the appliance
does not operate
or respond...
If there are strange odors...
If there's running water...
If a fine mist is coming
from the air outlet...
If strange noises are
being emitted...
If the airflow is
insufficient, and the
air is not hot or cold
enough...
If the appliance does not
respond to commands...
If the display is off...
Switch off the air
conditioner immediately
and cut off the power
supply in the event of...
ERROR SIGNALS ON THE DISPLAY
In case of error, the display on the indoor unit may show the following error codes:
Display
Description of the error
Indoor temperature sensor fault
Indoor pipe temperature sensor fault
Outdoor pipe temperature sensor fault
Refrigerant system leakage or fault
Malfunction of indoor fan motor
Outdoor air temperature sensor fault
POSSIBLE CAUSES
There is a power failure/plug pulled out
The indoor/outdoor unit fan motor was damaged
There is a faulty compressor or thermomagnetic circuit breaker
There is a faulty protective device or fuses
The electrical connections are loose
The system has entered a protection mode
The system has entered an overvoltage or undervoltage protection
The TIMER-ON function is active
The electronic control board was damaged
The air filter is dirty
There was a backflow of liquid into the refrigerant circulation.
This occurs when the air in the room becomes very cold, for example in
"COOLING" or "DEHUMIDIFICATION/DRY" modes
This noise is made by the expansion or contraction of the front panel due
to variations in temperature, and if so, is normal
The temperature setting is unsuitable
The air conditioner intakes and outlets may be obstructed
The air filter may be dirty
The fan speed may be set at the minimum
There may be too many other heat sources in the room
The system may be getting low on refrigerant, pressures should be checked
The remote control may not be close enough to the indoor unit
The batteries of remote control may need to be replaced
There are obstacles between remote control and indoor unit signal receiver
The DISPLAY button has been pressed
There has been a power failure
Strange noises not due to expansion/contraction are heard during operation
The electronic control board is faulty or malfunctioning
Any fuses or switches are faulty or malfunctioning
The sound of spraying water or objects are heard inside the appliance
The cables or plugs have overheated
There are very strong odors being emitted from the appliance
Display Description of the trouble
Outdoor discharge temperature sensor fault
Outdoor IPM module fault
Outdoor current detection fault
Outdoor PCB EEPROM fault
Outdoor fan motor fault
Outdoor suction temperature sensor fault
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