Solcon HRVS-DN series, Instruction Manual

Page: 129 / 181

129 • Trouble Shooting
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Problem What To Do
PHASE LOSS trip
occurs after starting.

Verify that all three phases are within range.

Verify that EPT-Tx and EPT-Rx fiber optic wires are properly connected.

If low voltage mains is powered from a generator, check that the frequency is
within the range of 46Hz < f <64Hz.
Try to start and stop with SOFT START 0 and SOFT STOP CURVE 0.
UNBALANCE
CURRENT trip occurs
after starting.

Verify, by reading currents on the display, that the three current readings are
identical (before the trip).

Check that fiber optic wires 1, 3 & 5 are properly connected to the Control
Module.

Check that the Current Gain dip switches are set identically in the three
phases.

Verify that current flows in all three phases.

If there is no current display on one phase:
o
Change to SOFT START CURVE 0 (basic).
o
Try to start.

If the problem persists perform a firing test. Refer to section 14.3 page 121.
GROUND FAULT trip
occurs after starting.

View the three currents on starter’s display.

Check that the current Gain dip switches are set identically to ON in the three
phases.

Verify that output cables to the motor are not short circuited to the chassis
ground.

Verify that two wires of a CT are not swapped (can occur only if user
changed CTs wiring! )
Note: SUCH ACTION WILL VOID MANUFACTURER’S WARRANTY !

Disconnect the motor. Check motor insulation with a Megger tester.
Motor vibrates
mechanically at the
end of starting
process or at the
beginning of soft stop.
current fluctuates. 
This may occur if SOFT START CURVE 0 is used with a motor that has a
light or non-existent load,.

Use standard curve SOFT START CURVE 1 and SOFT STOP CURVE 1.
OPEN BYPASS trip
occurs after end of
start process.

Bypass Contactor cannot close.

If, when the Bypass is closed, currents do not flow through the starter CTs
then it is possible to override this trip by setting BY PASS OPEN TRIP at the
FAULT PARAMETERS page to DISABLE. This type of problem may occur if
the Bypass Contactor is located in another cabinet.
Current reading as
displayed on starter’s
panel is not correct.

Verify that the HRVS-DN FLC setting parameter is set according to the rated
current of the starter.

Verify that current Gain dip switches are set to on.
OVERLOAD trip
occurs after Bypass is
closed.

Verify that the STARTER FLC setting parameter is set according to the rated
current of the starter.

Verify that the MOTOR FLA is set according to motor nameplate current.

Reset, start again and read currents on screen.

Check if current readings are more than 100% of the motor’s rated current.

Compare to current readings of another device (if available).
UNDER CURRENT
trip occurs after
Bypass is closed. Reduce setting of UNDERCURR. TRIP setting in Starter’s MAIN & PROTECT
parameters page settings.
Motor is started
immediately after
resetting a trip.

It may be possible when Local / Remote switch is set to remote, and remote
contact is closed.

Note : It is the responsibility of the remote controller to open the remote
start/stop contact immediately upon detecting a trip in the soft starter. Trip
auxiliary contact exists in the customer terminals.