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7.5
E4/EH 60/E5/EH 61/F1/EC 53/F2/EC 52/F3/EC 54/F6/EC56 (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:
*See Appendix
Note: For certain models, outdoor PCB cannot 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. For certain models, outdoor unit uses combination sensor (T3, T4 and TP are the same of sensor).
Check the connection between
temperature sensor and PCB.
Is it properly wired?
YES
Measure the resistance value
of the sensor.
Is it within acceptable
parameters
*?
YES
Replace indoor PCB((E4/EH 60/E5/EH 61)
or outdoor PCB(F1/EC 53/F2/EC 52/
F3/EC 54/F6/EC 56)
Troubleshooting
NO
Ensure proper connections.
NO
Replace the sensor.
26
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