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DUAL, TRIPLE, POKER DC Inverter : 3. Outdoor Unitis & Troubleshooting
Multi Liberty
DC Inverter
• Troubleshooting by LED indicators of Multi Liberty (HFIU 266 X, 356 X) Indoor Units
Outline of malfunction
OPERATION
TIMER
PRE-DEF.
Flashing
ON
OFF
NO
NO
NO
YES
YES
YES
YES
NO
NO
Intervention of compressor’s thermal protection.
[Excluded Outdoor Units HCKU 816 X4, HCKU1066 X4]
If temperature detected on compressor is higher than 120°C, the system is stopped for intervention of thermal
protection of compressor itself.
Normal operation will be restored only when temperature value detected on compressor is lower than 90°C
(reactivation threshold of thermal protection).
Does refrigerant
flow properly
inside the system?
Does compressor
start?
Are compressor
motor’s connections
OK?
Does thermal
protection on
compressor operate
properly?
Inspect Outdoor Unit’s main
PCB. Does it malfunction?
Add refrigerant.
Check the connections and
test the system again.
Replace Outdoor Unit’s main
PCB.
Verify if there are
obstructions on refrigerant
circuit (capillary, etc.)
Intervention of protection for
compressor’s
overtemperture.
Does anomaly
persist even after
having added
refrigerant?
Replace thermal protection
on compressor.