Danfoss VLT AutomationDrive FC 301 Operating Manual page 56

VLT® AutomationDrive FC 301/FC 302
Operating Guide
Troubleshooting
• Increase the ambient temperature of the unit.
• Supply a trickle amount of current to the drive whenever the motor is stopped by setting parameter 2-00 DC Hold/Preheat Cur-
rent to 5% and parameter 1-80 Function at Stop.
7.4.64 ALARM 67, Option Module Configuration has Changed
Cause
One or more options have either been added or removed since the last power-down.
Troubleshooting
• Check that the configuration change is intentional and reset the unit.
7.4.65 ALARM 68, Safe Stop Activated
Cause
Safe Torque Off (STO) has been activated.
Troubleshooting
• To resume normal operation, apply 24 V DC to terminal 37, then send a reset signal (via bus, digital, or by pressing [Reset]).
7.4.66 ALARM 69, Power Card Temperature
Cause
The temperature sensor on the power card is either too hot or too cold.
Troubleshooting
• Check that the ambient operating temperature is within the limits.
• Check for clogged filters.
• Check fan operation.
• Check the power card.
7.4.67 ALARM 70, Illegal FC Configuration
Cause
The control card and power card are incompatible.
Troubleshooting
• To check compatibility, contact the Danfoss supplier with the type code from the unit nameplate and the part numbers on the
cards.
7.4.68 ALARM 71, PTC 1 Safe Stop
Cause
Because the motor is too warm, the VLT
Troubleshooting
• Once the motor temperature reaches an acceptable level and the digital input from MCB 112 is deactivated, perform 1 of the
following:
- Send a reset signal via bus or digital I/O.
- Press [Reset].
7.4.69 ALARM 72, Dangerous Failure
Cause
Safe Torque Off (STO) with trip lock.
Troubleshooting
An unexpected combination of STO commands has occurred:
• VLT PTC Thermistor Card MCB 112 enables X44/10, but STO is not enabled.
®
•
MCB 112 is the only device using STO (specified through selection [4] PTC 1 alarm or [5] PTC 12 warning in parameter 5-19 Termi-
nal 37 Safe Stop). STO is activated, but X44/10 is not activated.
56 | Danfoss A/S © 2021.01
PTC Thermistor Card MCB 112 activated the Safe Torque Off (STO).
®
Maintenance, Diagnostics, and
Troubleshooting
AQ267037727118en-000101 / 130R0300