Hitachi RAC-18SX8 Service Manual page 209

4. Failure phenomenon: The fan motor will not stop.
[ Situation ] I have conducted the stop operation on the product by remote control, but the indoor fan motor will not stop.
(It stopped about 3 minutes later.)
[ Estimated failure locations ]
[ Diagnosis flow ]
Initiating troubleshooting
Run the product by remote control and then stop it.
(Reproduce the failure phenomenon.)
Is the voltage between pins ④ and ⑥ of the fan motor
connector (CN2) below 1.5 V? (Take measurements
while the failure phenomenon is present.)
Replace the "indoor electrical installation."
・Indoor fan motor
・Fan motor drive circuit
No
Yes
Replace the "indoor fan motor."
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