Danfoss VLT AutomationDrive FC 302 Instruction Manual page 138

Warnings and Alarms
WARNING 60, External interlock
External interlock has been activated. To resume normal
operation, apply 24 V DC to the terminal programmed for
external interlock and reset the adjustable frequency drive
(via serial communication, digital I/O, or by pressing
[Reset]).
WARNING/ALARM 61, Tracking error
An error between calculated motor speed and speed
measurement from feedback device. The function warning/
alarm/disable is set in 4-30 Motor Feedback Loss Function.
Accepted error setting in 4-31 Motor Feedback Speed Error
and the allowed time the error occur setting in 4-32 Motor
Feedback Loss Timeout. During a commissioning procedure,
the function could be effective.
WARNING 62, Output frequency at maximum limit
The output frequency is higher than the value set in
4-19 Max Output Frequency.
ALARM 63, Mechanical brake low
The actual motor current has not exceeded the "release
brake" current within the "Start delay" time window.
ALARM 64, Voltage Limit
9 9
The load and speed combination demands a motor
voltage higher than the actual DC link voltage.
WARNING/ALARM 65, Control card over temperature
The cut-out temperature of the control card is 176 °F [80
°C].
Troubleshooting
•
Check that the ambient operating temperature is
within limits.
•
Check for clogged filters.
•
Check fan operation.
•
Check the control card.
WARNING 66, Heatsink temperature low
The adjustable frequency drive 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 adjustable
frequency drive whenever the motor is stopped by setting
2-00 DC Hold/Preheat Current at 5% and 1-80 Function at
Stop
Troubleshooting
The heatsink temperature measured as 32°F [0°C] could
indicate that the temperature sensor is defective, causing
the fan speed to increase to the maximum. If the sensor
wire between the IGBT and the gate drive card is discon-
nected, this warning would result. Also, check the IGBT
thermal sensor.
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Instruction Manual
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 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]).
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 of the unit from the nameplate and the part
numbers of the cards.
ALARM 71, PTC 1 Safe Torque Off
Safe torque has been activated from the MCB 112 PTC
Thermistor Card (motor too warm). Normal operation can
resume when the MCB 112 applies 24 V DC to T-37 (when
the motor temperature is acceptable) and when the digital
input from the MCB 112 is deactivated. When that
happens, a reset signal must be sent (via Bus, Digital I/O,
or by pressing [Reset]). Note that if automatic restart is
enabled, the motor could start when the fault is cleared.
ALARM 72, Dangerous failure
Safe Torque Off with trip lock. Unexpected signal levels on
safe stop and digital input from the MCB 112 PTC
thermistor card.
WARNING 73, Safe Stop auto restart
Safe stopped. With automatic restart enabled, the motor
could start when the fault is cleared.
WARNING 76, Power unit set-up
The required number of power units does not match the
detected number of active power units.
WARNING 77, Reduced power mode
The adjustable frequency drive is operating in reduced
power mode (less than the allowed number of inverter
sections). This warning is generated on power cycle when
the adjustable frequency drive is set to run with fewer
inverters and remains on.
Danfoss A/S © Rev. 2014-02-07 All rights reserved.
Check the operation of the door fans.
Make sure that the filters for the door fans are
not blocked.
Check that the connector plate is properly
installed on IP21/IP 54 (NEMA 1/12) adjustable
frequency drives.
MG37A222