7 Troubleshooting
56 MAGNETEK HPV1000 AC Elevator Drive Technical Manual
oFC52
CNC Enc Time Flt
Signal encoder timed out waiting to
receive data.
Encoder cable wiring is wrong.
• Correct the wiring.
Encoder cable does not seem to be connected.
• Verify that the encoder card is securely connected.
• Verify that there is no break in the encoder cable.
• Verify that the encoder cable isn’t too long.
Parameters for Encoder Select (C1) are set to the wrong values.
• Set Encoder Select (C1) to the proper setting.
oFC53
CNC Enc Dat Flt
Serial encoder CRC checksum error.
Encoder cable wiring is wrong.
• Correct the wiring.
Encoder cable does not seem to be connected.
• Verify that the encoder card is securely connected.
• Verify that there is no break in the encoder cable.
• Verify that the encoder cable isn’t too long.
oFC54
CNC Encoder Flt
Alarm reading EnDat absolute position
data from encoder (OR flag from EnDat
error for overvoltage, undervoltage, etc.)
Power supply to encoder is wired incorrectly.
• Correct the wiring.
The power supply circuit of the PG option card is damaged.
• Replace the PG option card.
oH
User Overtemp
Overtemp Alarm
The temperature of the heatsink exceeded
the OH Pre-Alarm Lvl (A4).
Parameters are set incorrectly.
• Verify that OH Pre-Alarm Lvl (A4) is not set too low.
Surrounding temperature is too high.
• Check the temperature surrounding the drive. Verify temperature is within
drive specifications.
• Improve the air circulation within the enclosed panel.
• Install a fan or air conditioner to cool the surrounding area.
• Remove anything near the drive that might be producing excessive heat.
Load is too heavy.
• Measure the output current.
• Decrease the load.
• Lower the Carrier Frequency (A4).
Internal cooling fan is stopped.
• Replace the cooling fan, and contact Magnetek to reset maintenance timer.
oH1
Overtemp Flt
The temperature of the heatsink exceeded
the drive overheat level.
Surrounding temperature is too high.
• Check the temperature surrounding the drive.
• Improve the air circulation within the enclosure panel.
• Install a fan or air conditioner to cool the surrounding area.
• Remove anything near the drive that might be producing excessive heat.
Load is too heavy.
• Measure the output current.
• Lower the Carrier Frequency (A4).
• Reduce the load.
oH3
Motor Overheat Alarm (PTC thermistor
input):
• The motor overheat signal to analog
input terminal A1 or A2 has exceeded
the alarm detection level.
Parameter settings are incorrect.
• Verify that the C5 sub-menu analog input of “Motor PTC” is set correctly.
• Verify that the analog input gain setting and bias offset in the A5 sub-menu
are set correctly: Analog A1 Gain, Analog A1 Bias, Analog A1 Offset,
Analog A2 Gain, Analog A2 Bias and Analog A2 Offset, all of which can
be found in the A5 menu.
Motor thermostat wiring is fault (PTC thermistor input).
• Repair the PTC thermistor input wiring.
Motor has overheated.
• Check the size of the load, the accel/decel times, and the cycle times.
• Decrease the load.
• Lower the acceleration and deceleration in the A2 sub-menu.
• Adjust the preset V/f pattern in the A5 sub-menu.
• Be careful not to lower Motor Mid Volts (A5) and Motor Min Volts (A5)
too much, as this reduces load tolerance at low speeds.
• Check the motor rated current.
• Enter the motor rated current as indicated on the motor nameplate in Rated
Motor Curr (A5).
Ensure the motor cooling system is operating normally.
• Repair or replace the motor cooling system.
Fault Code/Name Description Causes and Solutions
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