Sanyo SPW-C253GH5, Service Manual

Page: 64 / 108

SM830035
– 64 –
4
4. Service procedures
Power Supply: 50 Hz, 3-phase, 380-400-415 V
Fig. 29
1
2
U1
U2
R1
R2
R3
1
2
3
1
2
3
1
2
4
L1
L2
L3
N
Indoor Unit
Inter-unit
power wiring
(Line voltage)
Inter-unit
control wiring
(Low voltage)
RED
WHT
BLK
Remote controller
Outdoor Unit
Ground
Ground
(Option)
B
D
A 0499_M_I
Power supply
R.C. Address on the PCB: 0 (S2, BLK)
(0: Factory shipped state)
380 - 415 V - 3 N 50 Hz
L1
L2
L3
N
1
2
0
C
(1)-2 Check before and after Troubleshooting (SPW-C253GH8, C363GH8, C483GH8)
Many problems may happen because of wiring or power supply problems, so you should
check these areas first. Problems here can cause false results in some of the other tests,
and so should be corrected first.
1 1
1 1 1
. Check power supply wiring
❑
Check that power supply wires are correctly connected to terminal No.5
through No.8 on the 8P terminal plate in the outdoor unit.
❑
Check the power supply wires are correctly connected between terminal
No.1 and 2 on the 3P terminal plate in the indoor unit and terminal No.1
and 2 on the 8P terminal plate in the outdoor unit.
2 2
2 2
2
. Check inter-unit wiring
❑
Check that inter-unit control wiring (DC low voltage) is correctly connected
between the indoor unit and outdoor unit.
3 3
3 3
3
. Check power supply
❑
Check that voltage is within the specified range (
±
10% of the rating).
❑
Check that power is being supplied.
If the following troubleshooting must be done with power being supplied,
be careful not to touch any uninsulated live part that can cause ELECTRIC
SHOCK.
4 4 4 4 4
. Check the lead wires and connectors in indoor and outdoor units.
❑
Check that the sheath of lead wires is not damaged.
❑
Check that the lead wires are firmly connected at the terminal plate.
❑
Check that the wiring is correct.