JOG EXCITE: Service & Maintenance Manual - rev. 1.1
Page 6.16
6.5.4. ERROR OU
This inverter error message indicates an overvoltage condition on the inverter supply line.
Is the supply voltage at the
input to the AT driver box
correct?
Does the machine resume
correct operation af ter being
switched of f f or 1 minute?
YES
Probable high line voltage.
The machine is OK
Replace the AT driver
board
NO
OU
1
YES
Correct the cause of the
excessiv ely high line
voltage
NO
This error can be generated by even transient spikes in the mains voltage, resulting from
overloading or other factors. Therefore, it can be useful to check, in the error log, the
value of the mains voltage recorded at the time when the error occurred.
Follow the procedure step by step to correctly diagnose the problem. Take particular care with the
checks highlighted by circled numbers, which are described in detail below:
(1) Place the tester probes across terminals of the connector J1 of the AT driver board. The
measured voltage should be 220 VAC.
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