Heat Controller DMC24CA-1 - Page 44

44 Ceiling Cassette Air Conditioner
Troubleshooting Guide
Troubleshooting CH41, CH44, CH45, CH46, CH47, CH65
Ω
41
44
45
46
47
65
D-pipe sensor (Inverter)
Air sensor
Condenser Pipe sensor
Suction Pipe sensor
D-pipe sensor (Constant)
Heat sink sensor
• Open / Short
• Soldered poorly
• Internal circuit error
• Open / Short
• Soldered poorly
• Internal circuit error
• Open / Short
• Soldered poorly
• Internal circuit error
• Open / Short
• Soldered poorly
• Internal circuit error
• Open / Short
• Soldered poorly
• Internal circuit error
• Open / Short
• Soldered poorly
• Internal circuit error
• Normal resistor : 200KΩ / at 25°C(77°F) (Unplugged)
• Normal voltage : 4.5Vdc / at 25°C(77°F) (plugged)
• Normal resistor : 10KΩ / at 25°C(77°F) (Unplugged)
• Normal voltage : 2.5Vdc / at 25°C(77°F) (plugged)
• Normal resistor : 5KΩ / at 25°C(77°F) (Unplugged)
• Normal voltage : 2.5Vdc / at 25°C(77°F) (plugged)
• Normal resistor : 5KΩ / at 25°C(77°F) (Unplugged)
• Normal voltage : 2.5Vdc / at 25°C(77°F) (plugged)
• Normal resistor : 200KΩ / at 25°C(77°F) (Unplugged)
• Normal voltage : 4.5Vdc / at 25°C(77°F) (plugged)
• Normal resistor : 10KΩ / at 25°C(77°F) (Unplugged)
• Normal voltage : 2.5Vdc / at 25°C(77°F) (plugged)
Display
code
Title Cause of error Check point & Normal condition
Check Point
1. Estimate the resistance of each sensor.(Unplugged)
2. Estimate the voltage of each sensor.(Plugged)
3. If the resistance of the sensor is 0 kΩ or ∞, then sensor is abnormal.
If the voltage of the sensor is 0 V or 5Vdc, then sensor is abnormal.