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7 Troubleshooting
Fault Code/Name
dv7
Unable to detect the magnetic poles
within the designated time.
Polarity Det Flt
An invalid value resulted from Initial
dv8
Pole Search.
Note: Reset the fault and try
Pole Detect Flt
EF
Both forward run and reverse run closed
simultaneously for over 0.5 s.
Up/Down Alarm
EF0
An external fault condition is present.
Ext Opt Flt
Opt Card Alarm
46
Description
Initial Pole Search
again.
Causes and Solutions
Battery voltage is too low.
• Charge the battery.
The output cable is disconnected.
• Check for wiring errors and ensure the output cable is connected properly.
• Correct the wiring.
The motor winding is damaged.
• Check the resistance between the motor lines.
• Replace the motor if the winding is damaged.
The output terminal is loose.
• Apply the tightening torque specified in this manual to fasten the terminals.
Incorrect motor data has been sent.
• Check the parameters in the A5 sub-menu to make sure they match the
information on the motor nameplate.
Non-rotational alignment failure.
• A non-rotational alignment cannot be performed; perform a rotational
alignment instead.
Brake was released during Initial Pole Search or during power loss.
• Check the brake sequence.
• The brake must remain applied during Initial Pole Search and whenever the
power supply is interrupted.
Initial Pole Search cannot be performed on the monitor being used.
• Use a PG option card that is compatible with both the drive and an absolute
encoder.
Initial Pole Search cannot be performed.
• A non-rotational alignment cannot be performed; perform a rotational
alignment instead.
Sequence error.
• Check the forward and reverse command sequence and correct the
problem.
Note: When minor fault EF detected, motor ramps to stop.
An external fault was received from the PLC.
• Remove the cause of the external fault.
• Remove the external fault from the PLC.
Problem with the PLC program.
• Check the PLC program and correct problems.
MAGNETEK HPV1000 AC Elevator Drive Technical Manual
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