Service manual

103
14
Troubleshooting
Diagnostic Procedure for Check Code
Check code Operation cause
1. Inverter IOL operation
2. Service valve closed
[E5]
3. Cooling bypass PMV error
Inverter IOL operation
4. Miswiring of communication between indoor and
outdoor units
Is the IOL circuit normal?
1.Connector
2.Wiring
3.Outdoor P.C. board
Is the cooling bypass PMV B
normal?
Is wiring correct?
Repair IOL circuit.
Cooling bypass PMV B error
Set normal wiring.
Open valves fully.
No
Yes
Are the gas pipe and liquid
pipe service valves of the
outdoor unit fully open?
No
Yes
No
Yes
No
Yes
Insufficient refrigerant,
blockage, pipe breakage.
(Check miswiring of the outdoor unit according to miswiring check function.)