Midea ESG-Inv M Series - E2 Communication Malfunction between Controller and Main Control Board

ESG-Inv M
38
Midea ESG-Inv M Series Pool Heat Pump Manual
5.8 E2 Troubleshooting
Digital display output
Procedure
E2: Communication malfunction
between controller and main control
board
No
Interference from high voltage (220V or
higher) wires
Yes
Ensure the communication wires and
high voltage wires are separated
No
Communication wires are close to a
source of electromagnetic radiation such
as transformer or strong fluorescent lamp
Yes
Remove the source of interference, or
add additional shielding to the
communication wires
No
Communication wires have short
circuited, disconnected or are
misconnected
Yes
Reconnect the communication wires
No
Communication wires are not connected
in a daisy chain
Yes
Connect the communication wires in a
daisy chain
No
Replace main PCB or controller
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