technical & service manual split system air conditioner
technical & service manual split system air conditioner
technical & service manual split system air conditioner
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8. TROUBLESHOOTING<br />
8-1. Check before and after troubleshooting<br />
8-1-1. Check power supply wiring.<br />
● (For model AER222SC)<br />
Check that power supply wires are correctly connected to terminals L and N on the terminal plate in the outdoor<br />
unit.<br />
● (For model AER222SC3)<br />
Check that power supply wires are correctly connected to terminals L1,L2,L3 and N on the terminal plate in the<br />
outdoor unit.<br />
8-1-2. Check inter-unit wiring.<br />
● Check that inter-unit wiring is correctly connected to the indoor unit from the outdoor unit.<br />
Power supply:<br />
220-240V~50Hz<br />
Ground<br />
WARNING<br />
Hazardous voltage can cause ELECTRIC SHOCK or<br />
DEATH. Disconnect power or turn off circuit breaker<br />
before you start checking or servicing.<br />
Outdoor<br />
unit<br />
8-1-3. Check power supply.<br />
● Check that voltage is in specified range (±10% of the rating).<br />
● Check that power is being supplied.<br />
8-1-4. Check lead wires and connectors in indoor and outdoor units.<br />
● Check that coating of lead wires is not damaged.<br />
● Check that lead wires and connectors are firmly connected.<br />
● Check that wiring is correct.<br />
1<br />
2<br />
4<br />
L<br />
N<br />
Model: AER222SC<br />
Inter-unit<br />
power wiring<br />
Ground<br />
Indoor<br />
unit<br />
1<br />
2<br />
4<br />
Power supply:<br />
380 V – 400 V<br />
3N ~ 50 Hz<br />
23<br />
L1<br />
L2<br />
L3<br />
N<br />
Ground<br />
Outdoor<br />
unit<br />
1<br />
2<br />
N<br />
Model: AER222SC3<br />
Ground<br />
Indoor<br />
unit<br />
1<br />
2<br />
4 4<br />
L1<br />
Inter-unit<br />
L2 wiring<br />
L3
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