[E5] Inverter Iol Short Circuit - Toshiba HFCR407C Service Manual

Check code
[E5]
Inverter IOL short circuit
Is the IOL circuit normal ?
1. Connector
2. Wiring
3. Outdoor PC board
Are the gas pipe and liquid
pipe service valves of the
outdoor unit fully open ?
Is the cooling bypass
PMV B normal ?
Is wiring correct ?
Insufficient refrigerant, blockage,
pipe breakage.
14
Troubleshooting
Diagnostic procedure for check code
No
Yes
No
Yes
No
Yes
No
(Check miswiring of the outdoor unit according to miswiring check function.)
Yes
Operation cause
1. Inverter IOL operation
2. Service valve closed
3. Cooling bypass PMV error
4. Miswiring of communication between indoor and
outdoor units
Cooling bypass PMV B error
118
Repair IOL circuit.
Open valves fully.
Set normal wiring.