Midea V8 VRF Series User Manual

V8 VRF Indoor Units
83
Troubleshooting Guide
6.1.36 EA2 - Return air humidity sensor fault
Error display
Digital display
Display position
Panel or display box
Wired controller
Spot check interface
query
Error code is not
displayed
Error impact
The faulty IDU and other IDUs of the same system: operate normally.
ODU of the same system: operate normally.
Error trigger
If the main control board of an IDU has lost communication with the return air humidity sensor for 2
min
Error recovery
Automatic recovery
Possible cause
 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.
Troubleshooting
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?
Reconnect the plug tightly
Replace
the humidity sensor board and
power on the system again. Is the
fault cleared?
No
Yes
Yes
No
Are wires short circuited or
disconnected? (1)
Replace the wires
Fault cleared
Replace the main control
board of the IDU
Yes
No
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.

Midea V8 VRF Series Specifications

General

Brand	Midea
Model	V8 VRF Series
Category	Air Conditioner
Language	English