Midea V8 VRF Series User Manual

V8 VRF Indoor Units
74
Midea
V8
Series VRF Indoor Units
6.1.27 C79 - Abnormal communication between the IDU main control board and adapter board
Error display
Digital display
Display position
Panel, display box, and wired controller
Error impact
Faulty IDU: The fan continues running, and the EXV is closed. 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 adapter board for 2 min
Error recovery
Automatic recovery
Possible cause
See the Troubleshooting section.
Troubleshooting
C79
Cause 3: The IDU main control
board is damaged
Cause 4: The adapter board is
damaged
Cause 2: The communication
cable between the main control
board of the IDU and the adapter
board has become loose or is
connected to a wrong port
Properly connect the
cables and ensure
they are connected to
the right ports
Replace the main
control board of the
IDU
Replace the adapter
board
Cause 1: The communication
cable between the main control
board of the IDU and the adapter
board has become disconnected
or short circuited
Replace the
communication cable
and properly connect
the cable

Midea V8 VRF Series Specifications

General

Brand	Midea
Model	V8 VRF Series
Category	Air Conditioner
Language	English