12. SERVICE PROCEDURES

(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.

1Check power supply wiring

(a)Single-phase

Check that power supply wires are correctly connected to terminal No. 1 through No. 4 on the 4P terminal plate in the indoor unit and L1 and L2 on the 6P terminal in the outdoor unit.

2Check inter-unit wiring

Check that inter-unit control wiring (AC 230 - 208 V Line voltage) is cor- rectly connected between the indoor unit and outdoor unit.

Single-phase outdoor unit

 

Disconnect SW

 

 

(Field supply)

 

 

Indoor Unit

Outdoor Unit

 

B

 

 

1

 

1

 

2

 

2

 

G

Ground

G

 

 

 

Power supply

4

 

4

 

A

 

 

 

 

Inter-Unit

L1

 

 

Wiring

L2

 

 

(Line voltage)

 

 

 

 

 

 

G

Ground

 

 

 

 

Fig. 12

 

1089_M_I

3Check 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.

4Check 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.

5Reference

Condition of general cooling operation (Thermo. ON) SWEEP .................. ON

Indoor fan speed .... HIGH

SM830078

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Sanyo C4232, CL4232 service manual Service Procedures

CL4232, C4232 specifications

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