Carrier 42QHP09E8S User Manual

Troubleshooting
 Page 67 
5.6 E4/E5/F1/F2/F3 (Open circuit or short circuit of temperature sensor diagnosis and
solution)
Description: If the sampling voltage is lower than 0.06V or higher than 4.94V, the LED will display the failure.
Recommended parts to prepare:
• Wiring mistake
• Faulty sensor
• Faulty PCB
Troubleshooting and repair:
Check the connection between
temperature sensor and PCB.
Replace indoor or outdoor PCB
Is it within acceptable
parameters?
Is it properly wired?
Ensure proper connections.
NO
Measure the resistance value
of the sensor.
YES
Replace the Sensor.
NO
YES

Carrier 42QHP09E8S Specifications

General

Brand	Carrier
Model	42QHP09E8S
Category	Inverter
Language	English