OUT-84
DUAL, TRIPLE, POKER DC Inverter : 3. Outdoor Unitis & Troubleshooting
Multi Liberty
DC Inverter
The display shows “P0”.
Compressor discharge overtemperature.
Is compressor discharge temperature > 115°C?
NO
NO
NO
YES
Check wirings and right connection of the
discharge temperature sensor to the PCB of the
Outdoor Unit. Are they OK?
Restore connections.
Check for eventual refrigerant leaks.
Eliminate the leak and recharge R410A.
YES
YES
Check if R-T values of sensor correspond to the
specifications indicated in the corresponding tables
(see further on).
Replace Outdoor Unit’s main PCB.
Replace temperature sensor on
compressor discharge.
If detected temperature on compressor discharge is higher than 115°C for at least 10 seconds, the system is
stopped.
Normal operation can be restored only if temperature value detected on compressor discharge is lower than
90°C.
Protection for compressor’s discharge overtemperature
[All Models of Outdoor Units]
Protection Code on Outdoor Unit
Outline of protection function
P 0
Hypothesis:
Malfunction of thermistor on
compressor discharge.
• Troubleshooting flowcharts, referred to Protection Codes displayed on Outdoor Unit: