MCAC-ATSM-2014-01
R410A Mini Split Chiller 50Hz
43
E7:
Plate heat exchanger temperature sensor 1 checking channel is abnormal
E8:
Plate heat exchanger temperature sensor 2 checking channel is abnormal.
LED indicates E7
Check whether the wiring of plate heat exchanger
temperature sensor 1 is broken.
Yes
Connect the wiring well.
Check whether the plate heat exchanger temperature
sensor 1 is broken: see whether the resistance of
plate heat exchanger temperature sensor is wrong.
No
Yes
Replace the plate heat exchanger
temperature sensor 1.
LED indicates E8
Check whether the wiring of plate heat exchanger
temperature sensor 2 is broken.
Yes
Connect the wiring well.
No
Check whether the plate heat exchanger temperature
sensor 2 is broken: see whether the resistance of
plate heat exchanger temperature sensor is wrong.
Yes
Replace the plate heat exchanger
temperature sensor 2.
Replace the PCB.
No
Replace the PCB.
No
