Troubleshooting
Page 91
5.5 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
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