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DUAL, TRIPLE, POKER DC Inverter : 3. Outdoor Unitis & Troubleshooting
Multi Liberty
DC Inverter
Outline of malfunction
OPERATION
TIMER
DEF./FAN
Flashing
OFF
ON
ALARM
OFF
• Troubleshooting by LED indicators of Multi Liberty (HTFU, HSFU, HRBU) X Indoor Units
NO
NO
NO
YES
YES
YES
YES
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?
NO
NO
Add refrigerant.
Check the connections and
test the system again.
Replace thermal protection
on compressor.
Replace Outdoor Unit’s main
PCB.
Verify if there are
obstructions on refrigerant
circuit (capillary, etc.)
Intervention of protection for
compressor’s
overtemperture.
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).
Intervention of compressor’s thermal protection.
[Excluded Outdoor Units HCKU 816 X4, HCKU1066 X4]
Does anomaly
persist even after
having added
refrigerant?