Heat Controller DMH18DB-1 ErrorCode, 62Multi type Air Conditioner, Troubleshooting Guide, Title

Troubleshooting Guide

ErrorCode

■Trouble Shooting

Error	Title	Cause of error	Check point & Normal condition
code
		• Open / Short	Normal resistor : 10KΩ / at 25°C(77°F) (Unplugged)
01	Indoor air sensor	• Soldered poorly
			Normal voltage : 2.5Vdc / at 25°C(77°F) (plugged)
		• Internal circuit error
		• Open / Short	Normal resistor : 5KΩ/ at 25°C(77°F) (Unplugged)
02	Indoor inlet pipe sensor	• Soldered poorly
			Normal voltage : 2.5Vdc / at 25°C(77°F) (plugged)
		• Internal circuit error
		• Open / Short	Normal resistor : 5KΩ/ at 25°C(77°F) (Unplugged)
06	Indoor outlet pipe sensor	• Soldered poorly
			Normal voltage : 2.5Vdc / at 25°C(77°F) (plugged)
		• Internal circuit error

10KΩ

Ω

2.5Vdc

V

Check the resistance / voltage

❑Check Point

1.Unplug the sensor on Indoor unit PCB.

2.Estimate the resistance of each sensor

3.If the resistance of the sensor is 10KΩ/5KΩ at 25°C(77°F), then sensor is normal

4.If the resistance of the sensor is 0 KΩ or ∞, then sensor is abnormal. ➔ Change the sensor.

5.Plug the sensor on Indoor unit PCB and Power ON.

6.Estimate the voltage of each sensor.

7.If the voltage of the sensor is 2.5Vdc / at 25°C(77°F), then sensor is normal.

8.If the resistance of the sensor is 0 or 5Vdc, then sensor is abnormal. ➔ Repair or Change the PCB

62Multi type Air Conditioner