106 Fault tracing
Warning and fault messages displayed by the CDP-312R
control panel
The control panel displays the warnings and faults of the inverter control unit that it is
currently controlling. Flashing messages WARNING, ID:2 or FAULT, ID:2 on the control
panel display indicate a warning or fault at the other control unit. To display the warning or
fault identification text, switch the control panel to view the other control unit.
See PVS800 central inverters firmware manual (3AUA0000058422 [English]) for the
descriptions, causes and remedies of the warning and fault messages.
Fault: Same ID numbers
If the ID numbers of the two control units are set equal, the control panel stops functioning.
To clear the situation:
• Disconnect the panel cable from the master control unit RMIO board (A43).
• Set the ID number of the inverter control unit RMIO board (A41) to 2. For the setting
procedure, see the PVS800 central inverters firmware manual (3AUA0000058422
[English]).
• Connect the disconnected cable to the RMIO board of the master control unit (A43)
again and set its ID number to 1.
Fault tracing of the insulation monitoring device
(options +Q954, +Q976 and +Q981)
Refer to section Implementing ground fault monitoring in IT (ungrounded) systems,
page 81.
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