Troubleshooting - Bosch Rexroth PRC 7000 Betriebsanleitung

R911172834 / 02 | PRC7000
14

Troubleshooting

Reset fault
The units are sturdily built. Nevertheless, disturbances may occur in ex­
ceptional cases:
• by wrong electrical connection or overvoltage in the mains,
• by insufficient cooling, maintenance or overload,
• by exceeding the maximum current values (parametrization) or
monitoring values.
When an error has occurred, the timer will be inhibited. In this con­
dition, no welding schedule is possible until the error has been reset.
If warnings are present, welding is still possible.
In case of fault, the diagnosis module shows the fault number.
More detailed information on the errors that occurred is provided
• via PRI7000 in the „Error table"
A list of all error and status messages is provided in the online help of
the PRI7000 software.
There you will also find information on error elimination in addition to
the possible causes.
Both faults and warnings may be "self‐resetting" or "non-self‐resetting".
"Self‐resetting" means that events are automatically reset by the timer
when the cause of the fault or the warning has been corrected. There­
fore, they do not require a manual fault reset.
Examples of self‐resetting faults include:
- Stop / No 24V
- Power voltage off / too low
- Synchronization / mains / DC-link voltage error.
"Non-self-resetting" faults can be reset via
• the PRI7000 software
• a positive edge at the fault reset inputs of the I/O array of the weld
timer
• the diagnosis module
The "Heat sink temperature too high" and "Overcurrent or earth fault"
errors must always be manually reset via the RESET button or on the
diagnosis module.
Example of a fault: Temperature monitoring responds
The integrated power unit indicates temperatures greater than/
1.
equal to 65° C (+5° C) to the integrated weld timer.
As a result, the weld timer stops all further sequences.
2.
The "Power unit temperature" error is displayed.
3.
Possible cause
Contaminated heat sink.
Ambient temperature too high.
Bosch Rexroth AG
Troubleshooting
Action
Clean heat sink.
Check installation area cooling for
proper installation and functioning.
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