Midea V8 VRF Series - Page 51

V8 VRF Indoor Units
50
Midea
V8
Series VRF Indoor Units
6.1.9 A82 - MS (refrigerant flow direction switching device) fault
Faulty IDU
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:
 IDUs that share the same MS with the faulty IDU: The fan continues running, and the EXV is
closed. Other IDUs remain in operation.
 IDUs that share the same MS with the faulty IDU: V8 platform IDU displays the code "A82",
and V6 platform IDU displays the code "F8". Meaning of the code: MS fault. IDUs that are
connected to other MSs work properly.
ODU of the same system:
 Shutdown
 V8 platform ODU displays the code "A82" (V6 platform ODU displays the code "F8". Meaning
of the code: MS fault)
Error trigger
When the IDU receives a fault signal from MS
Error recovery
Automatic recovery (Note: Duration from fault triggering to automatic recovery is at least 30 min)
Possible cause
The MS is faulty.
Troubleshooting
A81/A82
Open the MS electric
control box connected to
the IDU and check the
error code displayed on
the digital display of MS
electric control box
Follow the instructions of
the MS Maintenance
Guide