Part 4 Trouble Shooting

Troubleshooting Guide(18,24,30kBtu/h Model)

1) Troubleshooting CH01, CH02, CH06

Error

Title

 

 

 

Cause of error

 

 

 

 

Check point & Normal condition

code

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Indoor air sensor

 

• Open / Short

Normal resistor : 10k/ at 25°C(77°F) (Unplugged)

01

 

• Soldered poorly

 

 

Normal voltage : 2.5VDC / at 25°C(77°F) (plugged)

 

 

 

 

 

 

 

 

• Internal circuit error

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

• Open / Short

 

Normal resistor :

5k/ 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 :

5k/ 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

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

10k

Check the resistance

2.5VDC

V

Check the 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 10k/ 5kat 25°C(77°F), then sensor is normal.

4.If the resistance of the sensor is 0 kor , then sensor is abnormal. Change the sensor.

5.Plug the sensor onto the 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.

- 55 -

Only for training and service purposes

Page 55
Image 55
Heat Controller VMC09SB-1/VMH09SB-1, VMC18SB-1/VMH18SB-1, VMC30SB-1/VMH30SB-1 Check Point, Troubleshooting CH01, CH02, CH06

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