Danfoss VLT FC 102 Operating Instructions Manual page 75

Diagnostics and Troubleshoo...
NOTICE
Repeated runs may heat the motor to a level where the
resistance R and R are increased. In most cases,
s r
however, this behaviour is not critical.
ALARM 58, AMA Internal fault
Contact the Danfoss supplier.
WARNING 59, Current limit
The current is higher than the value in
parameter 4-18 Current Limit. Ensure that motor data in
parameters 1–20 to 1–25 are set correctly. Increase the
current limit if necessary. Ensure that the system can
operate safely at a higher limit.
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 frequency converter (via
serial communication, digital I/O, or by pressing [Reset]).
WARNING/ALARM 61, Tracking error
An error has occurred between the calculated motor speed
and the speed measurement from the feedback device.
The function warning/alarm/disable is set in
parameter 4-30 Motor Feedback Loss Function. Accepted
error setting in parameter 4-31 Motor Feedback Speed Error
and the allowed time the error occur setting in
parameter 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
parameter 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
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 80 °C.
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
MG16I302
Operating Instructions
parameter 2-00 DC Hold/Preheat Current at 5% and
parameter 1-80 Function at Stop.
Troubleshooting
The heat sink temperature measured as 0 °C could indicate
that the temperature sensor is defective, causing the fan
speed to increase to the maximum. This warning results if
the sensor wire between the IGBT and the gate drive card
is disconnected. Also, check the IGBT thermal sensor.
ALARM 67, Option module configuration has changed
1 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
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].
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
STO has been activated from the VLT
MCB 112 (motor too warm). Normal operation can resume
when the VLT
DC to terminal 37 (when the motor temperature is
acceptable ) and when the digital input from the VLT
Thermistor Card MCB 112 is deactivated. When that
happens, a reset signal is be sent (via Bus, Digital I/O, or by
pressing [Reset]).
NOTICE
If automatic restart is enabled, the motor could start
when the fault is cleared.
ALARM 72, Dangerous failure
STO with trip lock. Unexpected signal levels on safe stop
and digital input from the VLT
112.
WARNING 73, Safe Stop auto restart
Safe Torque Off activated. With automatic restart enabled,
the motor can start when the fault is cleared.
Danfoss A/S © 04/2015 All rights reserved.
Check the operation of the door fans.
Check that the filters for the door fans are not
blocked.
Check that the gland plate is properly installed
on IP21/IP54 (NEMA 1/12) frequency converters.
®
®
PTC Thermistor Card MCB 112 applies 24 V
®
PTC Thermistor Card MCB
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PTC Thermistor Card
®
PTC
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