Ea2 Return Air Humidity Sensor Fault - Midea V8 VRF Series Service Manual

6.1.36 EA2 - Return air humidity sensor fault
Error display
The faulty IDU and other IDUs of the same system: operate normally.
Error impact
ODU of the same system: operate normally.
If the main control board of an IDU has lost communication with the return air humidity sensor for 2
Error trigger
min
Error recovery Automatic recovery
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Possible cause
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Troubleshooting
Note:
1. Use a multimeter to measure the resistance between the pin in the plug at two ends of each
wire. A resistance value close to 0 indicates a short circuit has occurred in the wire, and a
resistance value close to infinity indicates an open circuit in the wire.
Digital display
The humidity sensor board is damaged.
The cable plug connecting to the RH port in the IDU main control board is loose.
The cable plug connecting to the humidity sensor board is loose.
The IDU main control board is damaged.
EA2
Is the cable plug
(with one end connecting to
RH port of the IDU main control
board and the other end connecting
to humidity sensor board)
loose?
No
Are wires short circuited or
disconnected? (1)
No
Replace
the humidity sensor board and
power on the system again. Is the
fault cleared?
No
Replace the main control
board of the IDU
V8 VRF Indoor Units
Display position
Panel or display box
Spot check interface
query
Yes
Reconnect the plug tightly
Yes
Replace the wires
Yes
Fault cleared
Wired controller
Error code is not
displayed
83