Midea MGA-D10/N1 Manual page 37

Troubleshooting
E7: Plate heat exchanger temperature sensor 1 checking channel is abnormal
LED indicates E7
Judge 1: Check whether the wiring of plate heat
exchanger temperature sensor 1 is break off
Judge 2: Check whether the plate heat exchanger
temperature sensor 1 is broken: see whether the
resistance of plate heat exchanger temperature
sensor is wrong refer to the Annex 1
Replace the PCB
E8: Plate heat exchanger temperature sensor 2 checking channel is abnormal
LED indicates E8
Judge 1: Check whether the wiring of plate heat
exchanger temperature sensor 2 is break off
Judge 2: Check whether the plate heat exchanger
temperature sensor 2 is broken: see whether the
resistance of plate heat exchanger temperature
sensor is wrong refer to the Annex 1
Replace the PCB
36
No
No
No
No
Yes
Connect the wiring well
Yes
Replace the plate heat exchanger
temperature sensor 1
Yes
Connect the wiring well
Yes
Replace the plate heat exchanger
temperature sensor 2
MCAC-UTSM-2008-11
Outdoor Unit