frako RM 2106 - Alarms and Troubleshooting; Connection Errors

Alarms and troubleshooting
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6 Alarms and troubleshooting
The control relay has a number of ways of
identifying connection errors and functional
errors.
6.1 Connection errors
If automatic response current identication has
been activated on the control relay (setup code
-4-), the control relay can identify the following
errors after ”initial start-up” or ”check system”
procedure.
In all cases the connection of the power factor
correction system and the wiring of the control
relay are to be checked (see connection
diagrams 3 to 6).
6.1.1 E3 - No capacitors
This error message appears when the control
relay was able to measure a current, but was
unable to detect a change in current when
switching the capacitor stages.
This can have the following causes:
■ control contacts (contactors) are not
connected or are not working correctly
■ the fuses of the capacitor stages have not
been installed
■ the current transformer is not located
between power supply and loads
(including PFC) (see connection
diagrams 3 to 6).
In this case the reactive power control system
must be set out of operation and the error has
to be eliminated.
The faulty power control system may not be
operated under any circumstances in this
condition.
6.1.2 E1 - Defect capacitor stages
Possible causes:
■ individual capacitor stages only have
2-phase connections to the mains
■ the defect capacitor stages do not draw
a symmetrical current from the 3 phases
6.1.3 E2 - Incorrect connection
Possible causes:
■ the entire power factor correction system or
all capacitors have only been connected in
2-phase connections
■ the ”Meas” terminal is unused and 2
phase conductors are connected between
terminal ”N” and ”L”
■ the ”Meas” terminal is connected to the
neutral conductor
■ the ”L” terminal is connected to the
neutral conductor
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