WARNING 59, Current limit
The current is higher than the value in 4-18 Current Limit.
Ensure that motor data in parameters 1-20 to 1-25 are set
correctly. Possibly increase the current limit. Be sure 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 62, Output frequency at maximum limit
The output frequency is higher than the value set in
4-19 Max Output Frequency.
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 control card has reached its trip temperature of 80 °C.
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 at 5% and
parameter 1-80 Function at Stop
Troubleshooting
The heatsink temperature measured as 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 disconnected,
this warning would result. Also, check the IGBT thermal
sensor.
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 stop 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 temperaturePower card
temperature
The temperature sensor on the power card is either too
hot or too cold.
Troubleshooting
•
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
ALARM 70, Illegal FC configuration
The control card and power card are incompatible. Contact
the supplier with the type code of the unit from the
nameplate and the part numbers of the cards to check
compatibility.
ALARM 72, Dangerous failure
Safe Stop with Trip Lock. Unexpected signal levels on safe
stop and digital input from the PTC thermistor card.
WARNING 73, Safe stop auto restart
Safe stopped. With automatic restart enabled, the motor
may start when the fault is cleared.
WARNING 76, Power unit setup
The required number of power units does not match the
detected number of active power units. When replacing an
F-frame module, this occurs if the power specific data in
the module power card does not match the rest of the
frequency converter.
Troubleshooting
•
Confirm the spare part and its power card are the
correct part number
WARNING 77, Reduced power mode
This warning indicates that the frequency converter is
operating in reduced power mode (i.e. 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 79, Illegal power section configuration
The scaling card is the incorrect part number or not
installed. Also 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. Reset the unit to clear the alarm.
ALARM 91, Analog input 54 wrong settings
Switch S202 has to be set in position OFF (voltage input)
when a KTY sensor is connected to analog input terminal
54.
ALARM 92, No flow
A no-flow condition has been detected in the system.
parameter 22-23 No-Flow Function is set for alarm.
Troubleshoot the system and reset the frequency converter
after the fault has been cleared.
ALARM 93, Dry pump
A no-flow condition in the system with the frequency
converter operating at high speed may indicate a dry
pump. parameter 22-26 Dry Pump Function is set for alarm.
Troubleshoot the system and reset the frequency converter
after the fault has been cleared.
ALARM 94, End of curve
Feedback is lower than the set point. This may indicate
leakage in the system. 22-50 End of Curve Function is set for
alarm. Troubleshoot the system and reset the frequency
converter after the fault has been cleared.
Warnings and Alarms
VLT HVAC Drive FC 102 Operating Instructions
138 MG11F402 - Rev. 2013-12-16
88
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