OUT-85
DUAL, TRIPLE, POKER DC Inverter : 3. Outdoor Unitis & Troubleshooting
Multi Liberty
DC Inverter
NO
NO
NO
YES
YES
YES
NO
Does refrigerant
flow properly inside
the system?
Does anomaly
persist even after
adding refrigerant?
Does compressor
start?
Are compressor
motor connections
OK?
Does thermal
protection on
compressor properly
work?
Inspect Outdoor Unit’s main
PCB.
Is it OK?
NO
NO
Add refrigerant.
Check wiring and test the
system again.
Replace thermal protection
on compressor.
Replace Oudoor Unit’s main
PCB.
Check if refrigerant circuit is
obstructed (capillary, etc.)
Intervention of protection for
compressor
overtemperature.
If temperature detected on compressor is higher than 120°C, the system is stopped for the intervention of
thermal protection of compressor itself.
Normal operation can be restored only if temperature value detected on compressor is lower than 90°C
(reactivation threshold of thermal protection).
Intervention of thermal protection for compressor
overtemperature
[Excluded Models HCKU 816 X4, HCKU 1066 X4]
Outline of protection function
• Troubleshooting flowcharts, referred to Protection Codes displayed on Outdoor Unit:
Protection Code on Outdoor Unit
P 0