Troubleshooting 25
7.5 EH 60/EH 61/EC 53/EC 52/EC 54/EC 56 (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 code.
Recommended parts to prepare:
• Connection wires
• Sensors
• PCB
Troubleshooting and repair:
Check the connection between
temperature sensor and PCB.
Replace indoor PCB (EH 60/EH 61) or
outdoor PCB (EC 53/EC 52/EC 54/EC 56)
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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