Heat Controller DMC24CA-1, DMC36CA-1 TroubleshootingCH24,CH25, 42Ceiling Cassette Air Conditioner

Troubleshooting Guide

TroubleshootingCH24,CH25

Display	Title	Cause of error	Check point & Normal condition
code
24	Press S/W Open	• Low / High press	• Check the connection of “CN_Press”.
		S/W open.	• Check the components.
25	Input voltage	• Abnormal Input voltage	• Check the power source.
		(140Vac , 300Vac .	• Check the components.

Check Point

• CH 24

1.Check the connection of “CN_PRESS”

2.Check the install condition for over load.

3.Check the SVC V/V open.

4.Check the leakage of refrigerant.

• CH 25

1.Check the power source.

2.Check the components

(Trans1, B/Diode, Diode, Resistance)

42Ceiling Cassette Air Conditioner