OUT-74
DUAL, TRIPLE, POKER DC Inverter : 3. Outdoor Unitis & Troubleshooting
Multi Liberty
DC Inverter
Communication error between Indoor Unit ↔ Outdoor Unit
NO
NO
NO
NO
NO
YES
YES
YES
• Troubleshooting by LED indicators of Multi Liberty HFIU 536 X Indoor Unit
Outline of malfunction
OPERATION
TIMER
PRE-DEF.
OFF
Flashing
OFF
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?
Communication error between Indoor Unit ↔
Outdoor Unit.