Heat Controller B-MMC09FA-1 사용자 설명서

Wall Mounted Multi-Zone Split System Air Conditioner

■ Trouble Shooting

• Open / Short
• Soldered poorly
• Internal circuit error

• Open / Short
• Soldered poorly
• Internal circuit error

• Open / Short
• Soldered poorly
• Internal circuit error

Normal resistor : 10K

Ω / at 25°C(77°F) (Unplugged)

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

Normal resistor : 5K

Ω/ at 25°C(77°F) (Unplugged)

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

Normal resistor : 5K

Ω/ at 25°C(77°F) (Unplugged)

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

Ω

10K

Ω

2.5Vdc

Check the resistance / voltage

V

❑ 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

Ω/5KΩ at 25°C(77°F), then sensor is normal

4. If the resistance of the sensor is 0 K

Ω or ∞, 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