Sanyo CG1411 Service Manual page 61

12-3-7. Outdoor Unit Power Supply Failure
Measure voltage between Terminals 5 – 6 on terminal block of outdoor unit.
Set temperature by remote controller so conditioner operates under Thermo. ON in either cooling or heating
operation, then start operation. Then measure voltage between Terminals 1 – 2 on terminal block of outdoor
unit.
Caution: It is not possible to measure while 3-minute restart timer is in operation.
Normal AC 104 – 126 V
In case of abnormality
No abnormalities, replace indoor unit PCB.
No abnormalities, proceed to check 12-3-8.
12-3-8. Outdoor Unit Power Transformer Defective
Check voltage of power transformer.
Measure voltage of 4P connector (CN10A), 3P connector (CN10B) and 2P connector (CN09) of indoor unit
PCB (without disconnecting connectors).
4P, CN10A
Normal
3P, CN10B
CN09
Caution: Care should be taken that the tips of the tester rods do not touch each other since the circuit is
electrically charged.
In case of abnormality
No abnormalities, replace outdoor unit PCB.
12-3-9. Outdoor Unit Compressor Motor Overload Relay Has Operated
Caution: Carry out this check only after cutting power at the mains or disconnecting unit from the power
supply.
Check temperature overload relay for continuity.
1 Ω or less
Normal
In case of abnormality
No abnormalities, check wiring to overload relay.
* Use a circuit tester (set to AC range).
Check connection of inter-unit cable.
RED – RED 20 – 30 V
BLU – BLU 10 – 15 V
YEL – YEL 85 – 115 V
ORG – ORG 104 – 126 V
Replace power transformer.
* Use a circuit tester (set to Ω range).
Check it again after more than 30 minutes (wait for it to cool down). If the result is
the same, replace the temperature overload relay.
* Use a circuit tester (set to AC range).
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