7 Troubleshooting
52 MAGNETEK HPV1000 AC Elevator Drive Technical Manual
LF
MTR Phse Flt
Phase Loss on the output side of the drive
was detected.
The output cable is disconnected.
• Check for wiring errors and properly connect the output cable on U, V, and
W.
• Correct the wiring.
• Verify that the motor contactor is closing when running.
• Verify that wen the motor contactor is picked, the drive and motor are
electrically connected.
The motor winding is damaged.
• Check the resistance between motor lines.
• Replace the motor if the winding is damaged.
The output terminal is loose.
• Check for loose wires on the motor contactor.
• Check for loose wires on the drive’s U, V, and W.
• Apply the tightening torque specified in this manual to fasten the terminals.
The rated current of the motor being used is less than 5% of the drive rated
current.
• Check the drive and motor capacities.
An output transistor is damaged.
• If the problem continues, replace the control board or the entire drive.
Contact Magnetek for instructions on replacing the control board.
A single-phase motor is being used.
• The drive cannot operate a single phase motor.
• Check the setting of Out Ph Loss Det (C1).
• Check that the correct output phase loss detection is being selected.
If it is a nuisance fault, disable the function.
LF2
Mtr Phse Balance
One or more of the phases in the output
current is lost.
Phase loss has occurred on the output side of the drive.
• Check for faulty wiring or poor connections on the output side of the drive.
• Correct the wiring.
Wires on the output side of the drive are loose.
• Check for loose wires on the drive’s U, V, and W.
• Check for loose wires on the motor contactor.
• Apply the tightening torque specified in this manual to fasten the terminals.
The output circuit is damaged.
• If the problem continues, replace the control board or the entire drive.
Contact Magnetek for instructions on replacing the control board.
Motor impedance or motor phases are uneven.
• Measure the line-to-line resistance for each motor phase. Ensure all values
are the same.
• Replace the motor.
LT-1
Fans Alarm
The cooling fan has reached its expected
maintenance period and may need to be
replaced.
The cooling fan has reached 90% of its expected performance life.
• Replace the cooling fan and contact Magnetek to reset timer.
LT-2
Capacitor Alarm
The main circuit and control circuit
capacitors are nearing the end of their
expected performance life.
The main circuit and control circuit capacitors have reached 90% of their
expected performance life.
• Replace either the control board or the entire drive. For instructions on
replacing the control board, contact Magnetek.
LT-3
PreCharge Alarm
The DC bus soft charge relay is nearing
the end of its expected performance life.
The DC bus soft charge relay has reached 90% of expected performance life.
• Replace either the control board or the entire drive. For instructions on
replacing the control board, contact Magnetek.
LT-4
IGBT Alarm 1
IGBTs have reached 90% of their
expected performance life.
IGBTs have reached 90% of their expected performance life.
• Check the load, carrier frequency, and output speed.
NOTICE: Optimize Performance Life. To maximize drive performance
life, make sure the drive output current does not exceed 150% of the
drive rated current. Expected performance life estimates the number
of drive starts at three million times if output does not exceed 150%.
This assumes the carrier frequency is at its default setting.
Fault Code/Name Description Causes and Solutions
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