Danfoss VLT AutomationDrive FC 301 Programming Manual page 364

Troubleshooting
Troubleshooting
•
Check the settings for warning/alarm/disabling in
parameter 4-30 Motor Feedback Loss Function.
•
Set the tolerable error in parameter 4-31 Motor
Feedback Speed Error.
•
Set the tolerable feedback loss time in
parameter 4-32 Motor Feedback Loss Timeout.
WARNING/ALARM 62, Output frequency at maximum
limit
If the output frequency reaches the value set in
parameter 4-19 Max Output Frequency, the drive issues a
warning. The warning ceases when the output drops
below the maximum limit. If the drive is unable to limit
the frequency, it trips and issues an alarm. The latter may
6 6
happen in the flux mode if the drive loses control of the
motor.
Troubleshooting
•
Check the application for possible causes.
•
Increase the output frequency limit. Ensure that
the system can operate safely at a higher output
frequency.
ALARM 63, Mechanical brake low
The actual motor current has not exceeded the release
brake current within the start delay time window.
WARNING 64, Voltage limit
The combination of load and speed requires a motor
voltage higher than the actual DC-link voltage.
WARNING/ALARM 65, Control card over temperature
The cutout temperature of the control card is 85 °C
(185 °F).
Troubleshooting
•
Check that the ambient operating temperature is
within the limits.
•
Check for clogged filters.
•
Check the fan operation.
•
Check the control card.
WARNING 66, Heat sink temperature low
The frequency converter is too cold to operate. This
warning is based on the temperature sensor in the IGBT
module. Increase the ambient temperature of the unit.
Also, a trickle amount of current can be supplied to the
frequency converter whenever the motor is stopped by
setting parameter 2-00 DC Hold/Preheat Current to 5% and
parameter 1-80 Function at Stop.
ALARM 67, Option module configuration has changed
One or more options have either been added or removed
since the last power-down. Check that the configuration
change is intentional and reset the unit.
ALARM 68, Safe Stop activated
Safe Torque Off (STO) has been activated. To resume
normal operation, apply 24 V DC to terminal 37, then send
a reset signal via bus, digital I/O, or by pressing [Reset].
362
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VLT AutomationDrive FC 301/302
If an alarm occurs during start-up, ensure that the 4-pole
fused disconnect is in the closed (horizontal) position.
Mains power must be present to remove the alarm.
ALARM 69, Power card temperature
The temperature sensor on the power card is either too
hot or too cold.
Troubleshooting
•
•
•
•
ALARM 70, Illegal FC configuration
The control card and power card are incompatible. To
check compatibility, contact the Danfoss supplier with the
type code from the unit nameplate and the part numbers
of the cards.
ALARM 71, PTC 1 safe stop
STO has been activated from the VLT
MCB 112 (motor too warm). Normal operation can be
resumed when the MCB 112 applies 24 V DC to terminal
37 again (when the motor temperature reaches an
acceptable level), and when the digital input from the MCB
112 is deactivated. When that happens, send a reset signal
(via bus or digital I/O, or press [Reset]).
ALARM 72, Dangerous failure
STO with trip lock. An unexpected combination of STO
commands has occurred:
•
•
WARNING 73, Safe Stop auto restart
STO activated. With automatic restart enabled, the motor
can start when the fault is cleared.
ALARM 74, PTC Thermistor
Alarm related to VLT
PTC is not working.
ALARM 75, Illegal profile sel.
Do not write the parameter value while the motor is
running. Stop the motor before writing the MCO profile to
parameter 8-10 Control Word Profile.
WARNING 76, Power unit setup
The required number of power units do not match the
detected number of active power units.
This warning occurs when replacing a module for an F-size
enclosure if the power-specific data in the module power
card does not match the rest of the frequency converter.
Danfoss A/S © 10/2019 All rights reserved.
Check that the ambient operating temperature is
within limits.
Check for clogged filters.
Check fan operation.
Check the power card.
®
®
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 1
warning in parameter 5-19 Terminal 37 Safe Stop),
STO is activated, and X44/10 is not activated.
®
PTC Thermistor Card MCB 112. The
PTC Thermistor Card
M0013101