Service manual

45
INTER-UNIT
WIRING
OUTDOOR INDOOR
UNIT UNIT
N
TROUBLESHOOTING COOLING MODEL
1)CHECK BEFORE AND AFTER “TROUBLESHOOTING”
a)Check power supply wiring.
•WARNING:
If the following troubleshooting must be done with power being supplied, be careful about any uninsula-
ted live part that can cause ELECTRIC SHOCK.
b)Check inter-unit wiring.
•Check that inter-unit wiring (both the power wiring and control wiring) is correctly connected to the
indoor unit from the outdoor unit.
(c)Check power supply
•Check that voltage is in specified range (±10% of the rating).
•Check that power is being supplied
OUTDOOR INDOOR
UNIT UNIT
INTER-UNIT
WIRING
➀
➁
➂
➃
➄
➀
➁
➂
➃
POWER
SUPPLY
GROUND
ADR522CW - AE522SC
➀
➁
➂
➃
➄
➅
➆
➇
POWER
SUPPLY
GROUND
ADR522CW - AE522SC3
ADR522CW - AER522SCL3
➀
➁
➂
➃
➄
➅
➆
➇
L1
L2
L3
N
L1
L2
L3
N
400V
400V
230V400V
L
N
230V
Single-phase systems
Three-phase systems
POWER SUPPLY
50 Hz - Single-phase
220/230/240 V
POWER SUPPLY
50 Hz - 3-phase 400V
4 Wires