Heat Controller MSS-009B/A manual Compressor/Outdoor Fan are unable to drive, Turn on Main Power

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4.Compressor/Outdoor Fan are unable to drive.

Turn on Main Power

Operate "Cooling Mode( * )° by setting the desired temperature of the

remote controller is less than one of the indoor temperature by 20F at least.

When in Fan Mode, Compressor/Outdoor Fan is stopped.

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Check the sensor for indoor temperature is attached as close as to be

effected by the temperature of Heat Exchanger(EVA).

When the sensor circuit for indoor temperature and connector are in bad connection or are not engaged, Compressor/Outdoor Fan is stopped.

"Check the related circuit of R11(12.1 K), R12(1.OK), R13(6.2K), R14(1.OK) Micom (No.55) (indoor unit).

"Check the indoor temperature sensor is disconnected or not(About 101Q2 / at 25°C).

When the temperature around Outdoor PWB Ass'y is above 163"F the compressor is stop and only Outdoor Fan is operating.

Check Relay(RY - COMP) for driving compressor.

"When the power(About AC20OV) is applied to the connecting wire termi- nal support transferred to compressor, PWB Ass y is normal.

"Check the circuit related to the relay(Outdoor unit).

Check pant	COMP ON	COMP OFF
Between Micom(No.	DCSV	DCOV
27) and GND
Between I B(No. 16)	Below DC IV	About DC12V
and GND	(app)

Tum off Main Power

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V

"Check the electrical wiring diagram of outdoor side.

"Check the abnormal condition for the component of Compressor/Outdoor Fan Motor.

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