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7. To complete the process, power on the
RCU again by turning "ON" the main/
solar supply and the battery switch. The
RCU will now operate as normal with the
Fusesavers and control panel.
Troubleshooting the Fusesaver operator
control panel
Fusesaver LEDs off - indicating no data
Some LED indications on the FS control
panel have a third state of no data when
both LEDs are off. There are a number of
reasons why a panel indication would have
no data:
RCU power up: On power up, the RCU
searches for Fusesavers, checks their
configuration for correct match and
synchronizes time to them. The RCU OK
LED will be flashing during this time
which may take up to 10 minutes to
finish. During this time no data will be
available.
RCU failed to find Fusesavers line: If the
RCU fails to find a correctly configured
Fusesaver line, then all phases will
remain in the no data state and the RCU
problem LED will be red.
Phase not present: If a FS line has less
than three phases, then the phases that
are not present will always have their
LEDs in the no data state, e.g., FS line
only has B and C phases, then A phase
will have no data.
Communications lost to a FS (e.g.,
communications module removed):
When communications to the Fusesavers
are restored, the RCU will verify the FS
configuration is still OK, which can take
up to five minutes for a single phase and
during this time no data will be
displayed for that FS.
No control source - local
In order to carry out FS controls via the
control panel, the control source must
indicate local control is allowed. There are a
number of reasons why the control source
local would not be lit.
Control source Siemens Connect: Local
control will not be allowed while
Siemens Connect is in session with the
Fusesavers.
Control source – remote: Local control
may not be allowed while the remote
operator has control to the Fusesavers.
This functionality depends on the
configuration setting of the RCU, see
Operator control panel ignore remote
switch on page 51.
RCU power up: On power up the RCU
will search for and check the
configurations of Fusesavers in the
vicinity. During this time the RCU OK LED
will be flashing and both local and
remote control to Fusesavers is not
available.
FS external lever down: When the
external lever of any FS on the line is
down, then controls to all Fusesavers,
remote or local, are disallowed.
Depending on the RCU configuration,
trip controls may still be allowed even
though the control source is LED is not
lit.
RCU synchronizing new time: All RCU
controls, remote or local, will be locked
out for a short period (less than 30
seconds) when new time is being
synchronized from the RCU to the
Fusesavers; this avoids unreliable
controls.
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