Solcon HRVS-DN series User Manual

125 • Trouble Shooting
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Problem What To Do
SET CURVE TO 0 trip
occurs after starting.
 Check that pairs of Gain dip switches are set identically for the three phases.
 Try SOFT START CURVE 0.
Motor makes irregular
noise while starting.
 Verify that the motor is not too small. Try to use a larger motor, with inertia or
loaded, if possible.
 If vibration occurs at the beginning of start process with SOFT START
CURVE 1, 2, 3, 4 or 5 try SOFT START CURVE 0.
 If vibrations occurs at the beginning of start process with SOFT START
CURVE 0 check low voltage test harness installation, fiber optic 11 & 13 and
EPT-Rx outputs.
 Vibrations, when approaching full speed at the start of SOFT START CURVE
0 with motors that have no load are normal and do not indicate a problem.
With other SOFT START CURVE it can occur with small / unloaded motor
which accelerates too fast. Try to reduce INITIAL VOLTAGE to a minimum.
 Verify that current Gain dip switches are set according to the ratio between
the rated current of the HRVS-DN and the testing motor rated current .
 If the test motor is loaded or has some inertia, try to start with SOFT START
CURVE 0, the basic curve. If the problem is solved, then test the current
transformers and their wiring. Sometimes the SOFT START CURVE 0
enables a loaded motor to start properly, even if a CT or its wiring are faulty
or with a problematic mains (weak transformer for the low voltage test).
 Check that all fibers are properly connected according to their numbers.
O/C-SHEAR PIN trip
occurs immediately
after starting.
 Verify that Current Gain dip switches are set according to the ratio between
the rated current of the starter and the testing motor rated current.
 The trip can occur if added (by setting of Gain dip switches) gain is too high.
 Try to start with SOFT START CURVE 0 and stop with SOFT STOP CURVE
0. If problem us solved the current transformers and their wiring should be
checked.
 Check that all fiber optic wires are properly connected.
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 frequency is
within the range of 46Hz < f <64Hz.
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 problem still exist 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 in the three
phases.
 Verify that an output cable to the motor is 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 low voltage motor. Check motor insulation with a Megger
tester.

Solcon HRVS-DN series Specifications

General

Brand	Solcon
Model	HRVS-DN series
Category	Controller
Language	English