Symptom
Possible cause
Test
Solution
No function
Missing input power
See startup guide for voltage checks.
Correct voltage at source.
Missing or open fuses or circuit
breaker tripped
See open fuses and tripped circuit
breaker in this section for possible
causes.
Reset circuit breaker. If fuses, check for
opens with power removed from panel.
Loose connections in panel
Perform pre-startup check for loose
connections.
Tighten loose connections in the panel.
Missing customer connections
Missing customer connections can cause
the safety circuit or start signal to be
open.
See customer connections and make
sure all applicable connections are
made or jumpers installed, especially
customer interlock.
Loose customer connections
Check all customer connections for
tightness. Loose customer connections
can act like an open circuit.
Tighten loose customer connections.
Customer wires incorrectly terminated See customer connection drawing and
make sure wires are connected to correct
terminals.
Correct any wrong connections. This
could potentially cause damage to the
panel.
Improper voltage applied
See pre-startup check list.
Correct the voltage mismatch. This
could potentially damage the panel.
Use caution when applying power.
Incorrect power connections
See pre-startup check list to see if motor
and power leads were swapped.
Correct any wrong connections. This
could potentially cause damage to the
panel.
Power disconnect open
Verify that the disconnect or circuit
breaker is closed.
Correct any wrong connections. This
could potentially cause damage to the
panel.
Operator switches off
Verify that operator devices are in
operating position per startup
procedures.
Set switches to the correct position.
OL tripped
A tripped OL will disable the motor from
running. Verify that OL relay is in the
normal operating position per the
manual.
Perform pre-startup checklist and set
OL per instructions.
Open power
fuses or
circuit
breaker trip
Improper voltage applied
See pre-startup check list and correct
improper voltages.
Correct voltage mismatch. This could
potentially damage the panel. Use
caution when applying power.
Incorrect power connections.
Motor and line voltages swapped. Make
sure the line in and motor out are on
the correct terminals. See pre-startup
check list.
Correct any wrong connections. This
could potentially cause damage to the
panel.
Power ground fault
Check motor and panel power wires to
ground.
Eliminate any ground faults detected.
Phase to phase short
Motor or panel has a short phase to
phase. Check motor and panel phase to
phase for shorts.
Eliminate any shorts detected.
Motor overload
Motor is overloaded for the application.
Perform startup and verify motor
current is within specifications. If motor
current is exceeding nameplate FLA,
reduce the load on the motor.
Drive overload
Drive is overloaded for the application.
Perform startup and verify that drive
current is within specifications. If not,
reduce the load on the motor.
Loose connections
Perform pre-startup check for loose
connections.
Tighten loose connections.
Table 8.3 Fault Table
Start Up Troubleshooting
Option Panel Operating Instructions
MG14I102 - VLT
®
is a registered Danfoss trademark
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