31 | Page
V2.1
TROUBLESHOOTING TIPS
If a fault occurs, a fault code will be displayed on the LCD screen. See Table 23 for a list of
fault codes. Fault codes generally indicate that an issue exists independent of the phase
converter.
Table 25 – Troubleshooting
Incoming circuit breaker
continually trips
See page 35 for information on
replacing fuses.
If fuses are blown, this may also
require replacing filter capacitors
and/or the power board if the MOV’s
are damaged.
Use Table 23 for more information and
guidance on fault codes. Clear the fault
by power cycling the converter.
Remove the load to determine if the
issue is internal or external to the unit.
Check the jumper or switches
connected to the AUX1 and/or AUX2
inputs
Signals to the Control
Terminals corrupted
Shielded cable is required for AUX
terminal leads longer than 20 ft.
Input terminals L1 and
L2 not energized
Check the main input fuses or breaker.
Check the secondary circuit fuses. See
Figure 33 - Figure 35.
Overcurrent fault in
elevator application
Check elevator specs to ensure PT is
sized correctly.
Motor is spinning
backwards
Phase sequence to
motor is wrong.
Swap any two of the three motor leads.
LED lights
flickering or other
electrical noise
issues
Electromagnetic
interference issues
Ensure that problem does not persist
when PT is powered off.
Check grounding.
LED lighting can be prone to
noise/flickering when all LED lights are
being used. Installing an incandescent
light in a given circuit can often resolve
these problems.
Consider installing an EMI filter on the
phase converter input.
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