OUT-54
DUAL, TRIPLE, POKER DC Inverter : 3. Outdoor Unitis & Troubleshooting
Multi Liberty
DC Inverter
Outline of malfunction
Communication error between Indoor Unit ↔ Outdoor Unit
OPERATION
TIMER
DEF./FAN
OFF
Flashing
OFF
ALARM
OFF
• Troubleshooting by LED indicators of Multi Liberty (HTFU, HSFU, HRBU) X Indoor Units
Has normal operation of system
been restored?
Does LED4 (Red) on Outdoor Unit’s
PCB ON and is LED1 (Yellow)
flashing?
Power supply problem of Outdoor
Unit’s PCB. Check PCB wirings
according to wiring diagram. Are
connections OK?
Disconnect the system from power supply. Wait
some minutes, then connect the system to power
supply again. Start the system by IR Remote
Control.
Check connections of L, N, S
lines (and of Ground line)
between each Indoor Unit and
the Outdoor Unit.
Is Outdoor Unit’s PCB
connected to Ground properly?
Check connections and
test the system again.
Correct or restore
connections.
Replace Outdoor Unit’s
PCB.
Replace Indoor Unit’s
PCB. After a reset of
power supply, is anomaly
solved?
NO
NO
NO
NO
NO
YES
YES
YES
Communication error between Indoor Unit ↔
Outdoor Unit.