Midea V8 VRF Series User Manual

V8 VRF Indoor Units
103
Troubleshooting Guide
6.1.55 J55 - Speed control mode setting error
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 stops. Other IDUs of the same system: operate normally.
ODU of the same system: operate normally.
Error trigger
The IDU is non constant air flow control, but its main control program sets the fan speed according
to the constant air flow control mode.
Error recovery
Automatic recovery
Possible cause
 The IDU model is set incorrectly.
 The IDU main control board is damaged.
Troubleshooting
J55
Is the fault cleared?
Replace the main control
board of the IDU
Fault cleared
Yes
No
Use the dedicated tooling (1)
to set the model code for the
main control board of IDU,
and power on the unit again
Note 1: For specialized tooling and instructions, please contact your local dealer or technical
support personnel.

Midea V8 VRF Series Specifications

General

Brand	Midea
Model	V8 VRF Series
Category	Air Conditioner
Language	English