34
H
TROUBLESHOOTING HEATING 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
uninsulated live part that can cause ELECTRIC SHOCK.
• Check that power supply wires are correctly connected to terminals:
Single-phase system –No. 1 and No. 2 on the terminal plate in the outdoor unit.
Three-phase system – A D R 5 2 2 H W / A E 5 2 2 S H 3 - A E R 5 2 2 S H 3
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.
No. 8,9,10 and No. 11 on the terminal plate in the outdoor unit.
OUTDOOR INDOOR
UNIT UNIT
a
b
c
d
e
f
g
h
INTER-UNIT
CONTROL WIRING
a
b
c
d
e
f
g
h
POWER SUPPLY
50 Hz - Single-phase
220/230/240 V
GROUND
POWER
SUPPLY
GROUND
INTER-UNIT
POWER WIRING
ADR522HW / AE522SH
a
b
y
d
e
f
g
h
a
b
y
d
e
f
g
h
OUTDOOR INDOOR
UNIT UNIT
ADR522HW / AE522SH3-AER522SH3
a
b
c
d
e
f
INTER-UNIT
CONTROL WIRING
POWER SUPPLY
50 Hz - 3-phase 400V
4 Wires
POWER
SUPPLY
GROUND
INTER-UNIT
POWER WIRING
L1
L2
L3
N
GROUND
