Danfoss VLT AutomationDrive FC 302 Programming Manual page 224

Troubleshooting
WARNING 62, Output frequency at maximum limit
The output frequency has reached the value set in
4-19 Max Output Frequency. Check the application for
possible causes. Possibly increase the output frequency
limit. Be sure that the system can operate safely at a
higher output frequency. The warning clears when the
output drops below the maximum limit.
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
5 5
The combination of load and speed 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
2-00 DC Hold/Preheat Current at 5% and 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
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
•
Check that the ambient operating temperature is
within limits.
•
Check for clogged filters.
•
Check fan operation.
•
Check the power card.
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.
222
®
VLT AutomationDrive FC 301/302
ALARM 71, PTC 1 safe stop
STO has been activated from the VLT
Card 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
must be sent (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
Safe Torque Off activated. With automatic restart enabled,
the motor can start when the fault is cleared.
ALARM 74, PTC Thermistor
Alarm related to the ATEX option. The PTC is not working.
ALARM 75, Illegal profile sel.
Parameter value must not be written while motor is
running. Stop motor before writing MCO profile to
parameter 8-10 Control Word Profile.
WARNING 76, Power unit setup
The required number of power units does not match the
detected number of active power units.
WARNING 77, Reduced power mode
The frequency converter is operating in reduced power
mode (less than the allowed number of inverter sections).
This warning is generated on power cycle when the
frequency converter is set to run with fewer inverters and
remains on.
ALARM 78, Tracking error
The difference between set-point value and actual value
has exceeded the value in parameter 4-35 Tracking Error.
Disable the function or select an alarm/warning in
parameter 4-34 Tracking Error Function. Investigate the
mechanics around the load and motor, check feedback
connections from motor encoder to frequency converter.
Select motor feedback function in parameter 4-30 Motor
Feedback Loss Function. Adjust tracking error band in
parameter 4-35 Tracking Error and parameter 4-37 Tracking
Error Ramping.
ALARM 79, Illegal power section configuration
The scaling card has an incorrect part number or is not
installed. The MK102 connector on the power card could
not be installed.
ALARM 80, Drive initialised to default value
Parameter settings are initialised to default settings after a
manual reset. To clear the alarm, reset the unit.
Danfoss A/S © Rev. 10/2014 All rights reserved.
•
®
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.
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PTC Thermistor
MG33MJ02