Trouble-Shooting
39
7 Trouble-Shooting
Pos. Fault Possible causes Necessary action
1 Control relay not wor-
king; no displays on the
front of the control relay
No or the wrong voltage
has been applied to the
control relay
Check that operating voltage
applied to the control relay is at
the right level
2 The control relay does
not react to manual
switching despite
availability of power and
functioning indicators
Delay time of about
10 seconds is not up
If the required stage ashes in
the stage display (a) then wait
until the stage switches
Manual mode is not
activated
Hold down „Select“ key until
„Manual Mode“ LED (g) lights up
3 Stage indicator (a) lights
up, however capacitor
contactors are not
switched on
Control circuit not
connected correctly or
no control voltage
Check the control circuit in
accordance with the connection
diagram; check fuse
No zero conductor at
contactors
4 Control relay does not
terminate the automatic
measuring procedure
Unstable mains supply
(strong power factor
variation)
Wait for more stable mains condi-
tions or enter the response current
and switching sequence manually
5 One stage is conti-
nuously activated and
deactivated in automatic
control relay mode
Response current set
too low
Set the response current correctly
in accordance with Table 1 or
Formula 1
Strong load variation
Table 3 Notes on troubleshooting
zavoshelectric.ir
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