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4. Service procedures
1
2
3
4
Section
– 65 –
SM830076
9) Symptom: LCD on the remote controller displays “CHECK P01”.
(Indoor fan protection thermostat operation warning)
No
No
No
Yes
Yes
Yes
1146_THS_I
Start
Is there 230-208 V AC between S4
and T20-3 on the indoor unit PCB?
Is there
230-208
V AC between
T20-3 and S4 after T20-1 and T20-3
on the indoor unit PCB shorted?
Is the indoor fan wire winding
protection thermostat (49FI) off?
Replace the indoor fan.
Correct the connection
Replace the indoor unit PCB.