15
In such cases the entire control system is
to be switched off and the error must be
eliminated.
(For troubleshooting see section 6.)
In some circumstances the control relay
displays the message ”A2” after identifi-
cation of the connection type. This
means that there are deviations from the
types of connection shown that do not
restrict the control process.
This message is acknowledged auto-
matically after about 30 seconds or can
be acknowledged by pressing any key.
The control relay always displays ”A1”
after identification of the connection type.
A stage indicator (a) also flashes. The
value displayed alternately with ”A1” in
the display is the determined value for
the indicated stage (switching contact).
This message is acknowledged auto-
matically for each stage after about 15
seconds or can be acknowledged earlier
by pressing any key.
When all messages have been acknow-
ledged, the control relay begins the auto-
matic regulating process. The current
power factor appears on the display.
If the power factor displayed does not
correspond to the actual power factor,
the identification of the connection must
be repeated. This is activated by press-
ing the ”Select” and ”Voltage thd” keys
simultaneously for at least 3 seconds
(check system).
3.2 Subsequent start-up
The control relay begins with its normal
regulatory program immediately after a
power failure.
If the ”Select” and ”Voltage thd” keys
are pressed simultaneously for at least 3
seconds (check system), then the control
relay carries out connection identification
again. It then behaves in the same way
as in the initial start-up (see section 3.1).
This requires that automatic connection
identification should be activated.
( setup mode -4-; see section 4.4)
The programmed control parameters are
stored in a non-volatile memory and can
be altered as necessary. (see chapter 4)
3.3 Maintenance
With maintenance of the power factor
correction system, also the function of
the control relay should be checked.
The control relay may be cleaned only
with a dry cloth.
Important information:
The control relay should be discon-
nected from the mains while cleaning
the back of the control relay.
