7 Troubleshooting
MAGNETEK HPV1000 AC Elevator Drive Technical Manual 63
Uv
Undervolt Alm
One of the following conditions was true
when the drive was stopped and an Up/
Down command was entered:
• DC bus voltage dropped below the
level specified in UV Detect Level
(A4).
• Contactor to suppress inrush current in
the drive was opened.
Phase loss in the drive input power terminals.
• Check for wiring errors in the main circuit drive input power. Correct the
wiring.
Loose wiring in the drive input power terminals.
• Ensure the terminals have been properly tightened.
• Apply the tightening torque to the terminals as specified.
There is a problem with the drive input power voltage.
• Check the voltage.
• Lower the voltage of the drive input power so that it is within the limits
listed in the specifications.
Drive internal circuitry is worn.
• Check the maintenance time for the capacitors in the D2 menu.
• Replace either the control board or the entire drive if Cap Life Mon (D2)
exceeds 90%. For instructions on replacing the control board, contact
Magnetek.
The drive input power transformer is too small and the voltage drops when
the power is switched on.
• Check for an alarm when the magnetic contactor, line breaker, and leakage
breaker are closed.
• Check the capacity of the drive input power transformer.
Air inside the drive is too hot.
• Check the temperature inside the drive.
The CHARGE light is broken or disconnected.
• Replace either the control board or the entire drive. For instructions on
replacing the control board, contact Magnetek.
Uv1
DC Bus Undervolt
One of the following conditions occurred
while the drive was running:
• Voltage in the DC bus fell below the
UV Detect Level (A4)
• For 400V Class: approx. 380V (350V
when Input Voltage (A4) is less than
400)
Input power phase loss.
• The main circuit drive input power is wired incorrectly.
• Correct the wiring.
One of the drive input power wiring terminals is loose.
• Ensure there are no loose terminals.
• Apply the tightening torque specified in this manual to fasten the terminals.
There is a problem with the voltage from the drive input power.
• Check the voltage.
• Correct the voltage to be within the range listed in drive input power
specifications.
• If there is no problem with the power supply to the main circuit, check for
problems with the main circuit magnetic contactor.
The power has been interrupted.
• Correct the drive input power.
The main circuit capacitors are worn.
• Check the maintenance time for the capacitors in the D2 menu.
• Replace either the control board or the entire drive if Cap Life exceeds
90%. For instructions on replacing the control board, contact Magnetek.
The relay or contactor on the soft-charge bypass circuit is damaged.
• Check power to the drive and see if the fault reoccurs.
• If the problem continues, replace either the control board or the entire
drive. For instructions on replacing the entire drive, contact Magnetek.
Uv2
Control Volt Flt
Voltage is too low for the control drive
input power.
Control power supply wiring is damaged.
• Cycle power to the drive. Check if the fault reoccurs.
• If the problem continues, replace the control board, the entire drive, or the
control power supply. For instructions on replacing the control board,
contact Magnetek.
Internal circuitry is damaged.
• Cycle power to the drive. Check if the fault reoccurs.
• If the problem continues, replace either the control board or the entire
drive. For instructions on replacing the control board, contact Magnetek.
Uv3
PreCharge Fault
The soft-charge bypass circuit failed.
The relay or contactor on the soft-charge bypass circuit is damaged.
• Cycle power to the drive and see if the fault reoccurs.
• If the problem continues, replace either the control board or the entire
drive. For instructions on replacing the control board, contact Magnetek.
voF
Output Volt Flt
Output Volt Alm
Problem detected with the voltage on the
output side of the drive.
Hardware is damaged.
• Replace either the control board or the entire drive. For instructions on
replacing the control board, contact Magnetek.
Fault Code/Name Description Causes and Solutions
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