Sinclair SDV 6 Service Manual page 70

8.1.9 A82 - MS (refrigerant flow direction switching device) fault
Faulty IDU
Error impact
Error trigger
Error recovery
Possible cause
Troubleshooting
Digital display
Faulty IDU: The fan continues running, and the EEV is closed. Other IDUs of the same system:
 IDUs that share the same MS with the faulty IDU: The fan continues running, and the EEV is
closed. Other IDUs remain in operation.
 IDUs that share the same MS with the faulty IDU: SDV6 plat. IDU displays the code "A82",
and SDV5 plat. 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
 SDV6 plat. ODU displays the code "A82" (SDV5 plat. ODU displays the code "F8". Meaning
of the code: MS fault)
When the IDU receives a fault signal from MS
Automatic recovery (Note: Duration from fault triggering to automatic recovery is at least 30 min)
The MS is faulty.
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
Display position
Panel, display box, and wired
controller
67