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SM830092
(1) Troubleshooting
1) Check before and after Troubleshooting
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
Check power supply wiring
(a) Single-phase
Check that power supply wires are correctly connected to L1 and L2 on the
6P terminal in the outdoor unit.
2
Check inter-unit wiring
Check that inter-unit wiring (AC 230 - 208 V Line voltage) is correctly con-
nected between the indoor unit and outdoor unit.
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
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.
5
Reference
• Condition of general cooling operation (Thermo. ON)
SWEEP .................. ON
Indoor fan speed .... HIGH
Single-phase outdoor unit
2
4
2
1
4
Indoor Unit Outdoor Unit
(B)
6P Terminal4P Terminal
(A)
L2
L1
G
G
G
230V/208V
230V/208V
230V/208V
Inter-Unit Wiring
(Line voltage)
Grounding line
Grounding line
Power supply
Single phase
230V/208V 60Hz
Disconnect
switch
(Field supply)
1
2206_M_S
12. SERVICE PROCEDURES
Fig. 15