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Protect PV.630 Maintenance and Servicing
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4.3.2 Diagnostic Functions
The comprehensive diagnostic functions implemented in the sys-
tem not only increase its operational reliability considerably, but al-
so reduce the time required for maintenance work and trouble-
shooting to a minimum.
The system is equipped with the following diagnostic functions,
some of which are optional:
Self-diagnosis:
This is activated when the system is switched on. Internal auxiliary
programs monitor and signal faults, including those from the bus
system, the control PCBs or the sensors.
Data logger:
Specified measured data and parameters are saved for every fault
that occurs. This data is read out and evaluated as required.
4.3.3 Reading Out the Memory
i
The fault memory is described in the operating instruc-
tions.
4.3.4 Removing Accumulated Dust
If large quantities of dust have accumulated, the system should, as
a precaution, be cleaned with dry compressed air in order to en-
sure adequate heat dissipation.
4.3.5 Obligation to Keep a Written Record
Inspection results and details of any maintenance work carried out
must be recorded in writing. Experience has shown that the best
way to document inspection results is in the form of a test report.
The following information must be recorded:
Maintenance schedule
Date of the measure carried out
Work performed
Any special notes on the work performed
Persons who carried out the work
Signatures of the persons who carried out the work
Signature of the person responsible (supervisor)
A correct test report, completed in full, is important for technicians
as evidence of exoneration in case of later complaints or for inves-
tigations in case of damage. For this reason, test reports should be
retained for a long time (around 10 years).