Heat Controller DMC24CA-1 manual When cooling does not operate, 34Ceiling Cassette Air Conditioner

Troubleshooting Guide

Trouble 3	When cooling does not operate
		Turn on Main Power

Operate "Cooling Mode( )" by setting the desired temperature of the remote controller to at least 1°C(1.8ºF) below room temperature.

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

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 indoor temperature sensor is disconnected or not(About 10kΩ / at 25°C(77°F)).

Check Relay(RY - COMP) for driving compressor.

•When the power(About AC208V-230V) is applied to the connecting wire terminal support transferred to compressor, PWB Ass'y is normal.

•Check the circuit related to the relay.

Check point	COMP ON	COMP OFF
Between two pin of DC	Below DC 1V	About DC12V
part in relay for COMP	(app)

34Ceiling Cassette Air Conditioner