M thermal Mono
202008 43
4.5 E3, E4, H2, H3, Ed, HA, H5, H9, Eb, E7,Ec Troubleshooting
Digital display output 4.5.1
Description 4.5.2
E3 indicates final outlet water temperature sensor error
E4 indicates a domestic hot water tank temperature sensor error.
H2 indicates a water side heat exchanger refrigerant outlet (liquid pipe) temperature sensor error.
H3 indicates a water side heat exchanger refrigerant inlet (gas pipe) temperature sensor error.
Ed indicates a water side heat exchanger water inlet temperature sensor error.
HA indicates a water side heat exchanger water outlet temperature sensor error.
H5 indicates a room temperature sensor error.
H9
indicates a circuit 2 water outlet temperature sensor error.
Eb indicates solar panel temperature sensor error
E7 indicates balance tank upper temperature sensor error
EC indicates
balance tank nether temperature sensor error
M thermal Mono stops running.
Error code is displayed on hydronic system main PCB and user interface.
Possible causes 4.5.3
Temperature sensor not connected properly or has malfunctioned.
Damaged hydronic system main PCB.
Midea CAC
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