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ESI Outdoor Unit Installation Instruction
05.2018
Manufacturer reserves the right to change at any time for specifications or designs without notice and incurring obligations.
Display
Liquid temperature sensor fault (TL)
1.Error definition:
The liquid temperature sensor (TL) is short circuit or open circuit.
2.Possible causes:
Damaged main control board
Loose connection at port on main control board.
Damaged temperature sensor
There are other heat sources around the sensor
YES
NO
Check whether TL sensor is seated to the specified location and
connected to CN4 on the main control board.
Reconnect the sensor
Check whether the resistance of sensor is in the range of
Temperature sensor A*
.
YES
NO
Replace the faulty sensor
Are there any other heat sources around the sensor?
NO
YES
Remove other heat source
Can the system go into backup running?
YES
Replace the sensor
Replace the main control board
NO