Troubleshooting
Page 64
8.4 EH 60/EH 61/EC 53/EC 52/EC 54/EC 55/EC 50/EC 05 (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 displays the failure.
Recommended parts to prepare:
• Connection wires
• Sensors
• PCB
Troubleshooting and repair:
Check the connection between
temperature sensor and PCB.
Replace indoor PCB((E4/E5) or
outdoor PCB(F1/F2/F3)
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
Note: For certain models, outdoor PCB could not be removed separately. In this case, the outdoor electric
control box should be replaced as a whole. This picture and the value are only for reference, actual appearance
and value may vary
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