OUT-47
DUAL, TRIPLE, POKER DC Inverter : 3. Outdoor Unitis & Troubleshooting
Multi Liberty
DC Inverter
NO
NO
NO
YES
YES
YES
YES
Does refrigerant flow
properly inside the
system?
Does anomaly
persist even after
having added
refrigerant?
Does compressor start?
Are compressor
motor’s connections
OK?
Does thermal
protection on
compressor operate
properly?
Ispect Outdoor Unit’s main
PCB.
Does it malfunction?
NO
NO
Add refrigerant.
Check the connections and
test the system again.
Replace the compressor’s
thermal protection.
Replace Outdoor Unit’s main
PCB.
Check if refrigerant circuit is
obstructed (capillary, etc.)
P 2
Intervention of protection for
compressor’s
overtemperature.
Protection Code on Indoor Unit
Outline of Protection function
• Troubleshooting for Protection Codes shown on Display of Multi Liberty HKEU X Indoor Units
If temperature detected on compressor is higher than 120°C, the system is stopped by the intervention of
compressor’s thermal protection.
Normal operation can be restored only when temperature detected on compressor is lower than 90°C
(reactivation threshold of thermal protection).
Intervention of compressor’s thermal protection.
[Excluded Outdoor Units HCKU 816 X4, HCKU1066 X4]