Troubleshooting Guide

Trouble 3

The Compressor/Outdoor Fan are don't operate

Turn on the main power.

Operate Cooling Mode by setting the disired temperature of the remote controller is less than one of the Indoor temperature by 1°C at least.

When in air circulation mode, compressor/outdoor fan is stopped.

Check the sensor for Indoor temperature is attatched as close as to be effected by the themperature of Heat Exchange (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 R01H(1K), R02H(1K), R03H(1K), R04H(1K), Micom(pin No. 74 , 75 , 76 , 77 ).

• Check the Indoor temperature sensor is disconnected or not (about 10K at 25°C).

Check the Relay(RY-PWR, RY-START) for driving Compressor.

Check the voltage between brown and blue cable of terminal to connect the Outdoor (About AC208V / 230V).

Check the related circuit of relay in Outdoor PCB Ass'y.

Check Point

Comp. ON

Comp. OFF

Between Micom(No. 50,51) and

DC 5V

DC 0V

GND

 

 

Between IC01M(No. 10) and

DC 1V

DC 12V

GND

 

 

 

 

 

Turn off main power.

Check the electrical wiring diagram of Outdoor side.

Check the open or short of connecting wires between Indoor and Outdoor.

Service Manual 59

Page 59
Image 59
Heat Controller DMH24DB-1, DMC24DB-1 manual Compressor/Outdoor Fan are dont operate, Check Point Comp. on Comp. OFF

DMC24DB-1, DMH24DB-1 specifications

The Heat Controller DMH24DB-1 and DMC24DB-1 units stand out in the realm of climate control solutions, combining advanced technology with user-friendly features to enhance indoor comfort. These air conditioning systems are designed to provide efficient cooling and heating for both residential and commercial spaces.

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