7 Troubleshooting
42 MAGNETEK HPV1000 AC Elevator Drive Technical Manual
bUS
Op Comm Flt
Op Comm Alarm
The connection was lost after establishing
initial communication;
Only detected when the Up/Down
command speed reference is assigned to
an option card.
No signal was received from the PLC, or faulty communications wiring or an
existing short circuit.
• Check for fault wiring.
• Correct the wiring.
• Check for disconnected cables and short circuits and repair as needed.
A communications data error occurred due to noise.
• Check the various options available to minimize the effects of noise.
• Counteract noise in the control circuit, main circuit, and ground wiring.
• Ensure that other equipment such as switches or relays do not cause noise.
Use surge absorbers if necessary.
• Use only recommended cables or other shielded line. Ground the shield on
the controller side or on the drive input power side.
• Separate all communication wiring from drive power lines. Install an EMC
noise filter to the drive power supply input.
The option card is damaged.
• Replace the option card if there are no problems with the wiring and the
error continues to occur.
The option card is not properly connected to the drive.
• The connector pins on the option card do not line up properly with the
connector pins on the drive.
• Reinstall the option card.
CALL
No Comms Alarm
Communication has not yet been
established.
Communications wiring is faulty, there is a short circuit, or something is not
connected properly.
• Check for wiring errors.
• Correct the wiring.
• Check for disconnected cables and short circuits. Repair as needed.
Programming error on the master side.
• Check communications at start-up and correct programming errors.
Communications circuitry is damaged.
• Perform a self-diagnostics check.
• If the problem continues, replace either the control board or the entire
drive. For instructions on replacing the control board, contact Magnetek.
Termination resistor setting is incorrect.
• A termination resistor must be installed at both ends of a communication
line. Slave drives must have the internal termination resistor switch set
correctly. Place DIP switch S2 to the ON position.
CE
Mod Comm Flt
Memobus Alarm
Communication data was not received for
the amount of time set in parameter
Communication Fault Detection Time.
Faulty communications wiring or an existing short circuit.
• Check for faulty wiring.
• Correct the wiring.
• Check for disconnected cables and short circuits and repair as needed.
Communication data error occurred due to noise.
• Check the various options available to minimize the effects of noise.
• Counteract noise in the control circuit, main circuit, and ground wiring.
• Use only recommended cables or other shielded line. Ground the shield on
the controller side or on the drive input power side.
• Ensure that other equipment such as switches or relays do not cause noise.
Use surge absorbers if required.
• Separated all communication wiring from drive power lines. Install an
EMC noise filter to the drive power supply input.
CF
Overtorque Flt
The torque limit was reached
continuously for three seconds or longer
while ramping to stop in OLV Control.
Motor parameters are improperly set.
• Check the motor parameter settings and repeat Auto-Tuning.
Torque limit is too low.
Set the torque limit to the most appropriate setting for Mtr Torque Limit (A1)
and Regen Torque Limit (A1).
Load inertia is too big.
• Lower the deceleration ramp rates in A2.
• Set the speed reference to the minimum value and interrupt the Up/Down
command when the drive finishes decelerating.
CoF
CT Fault
The current sensor is damaged or there
was residual induction current in the
motor (e.g., during sudden deceleration or
when coasting) when the drive attempted
to start the motor.
Due to residual induction current in the motor when the drive attempted to
start the motor, the drive attempted to adjust the current offset value beyond
the allowable range.
• Create a motor restart sequence that allows enough time for the residual
induction voltage to dissipate.
Hardware is damaged.
Replace the drive.
Fault Code/Name Description Causes and Solutions
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