Midea ESG-Inv M Series User Manual

ESG-Inv M
39
Part 5 – Diagnosis and Troubleshooting
5.9 E3, E5, E6, E9, EA, Ed, H2, H3, HA Troubleshooting
Digital display output
Procedure
E5: ODU heat exchanger temperature sensor
error (T3)
E6: ODU ambient temperature sensor error (T4)
E9: Suction temperature sensor error (Th)
EA: Discharge temperature sensor error (Tp)
Ed: Inlet water temperature sensor (TW-in)
malfunction
H2: Liquid refrigerant temperature sensor(T2)
malfunction
H3: Gas refrigerant temperature sensor(T2B)
malfunction
HA: Outlet water temperature sensor (TW-out)
malfunction
Temperature sensor is not installed
Yes
Installed the temperature sensor
No
Temperature sensor connection on main PCB is loose
Yes
Ensure the sensor is connected properly
No
Temperature sensor is affected by moisture or water
Yes
Dry the sensor
No
Temperature sensor has short-circuited or failed or big
temperature drift
Yes
Replace the sensor
No
Replace main PCB
Note:
1. ODU heat exchanger temperature sensor(T3), ODU ambient temperature sensor(T4) connection is port CN6 on the refrigerant system PCB
Suction temperature sensor(Th) connection is port CN5 on the refrigerant system PCB
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Midea ESG-Inv M Series Specifications

General

Brand	Midea
Model	ESG-Inv M Series
Category	Heat Pump
Language	English