Danfoss VLT FC 102 Operating Instructions Manual page 177

VLT HVAC Low Harmonic Drive Operating In-
structions
WARNING/ALARM/TRIP 65, Control card over temperature
Control card over temperature: The cutout temperature of the control
card is 80° C.
WARNING 66, Heatsink temperature low
This warning is based on the temperature sensor in the IGBT module.
Troubleshooting:
The heatsink temperature measured as 0° C could indicate that the tem-
perature 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.
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 the reset key. See par. .
ALARM 69, Power 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 IP 21 and IP
54 (NEMA 1 and NEMA 12) drives.
ALARM 70, Illegal FC Configuration
Actual combination of control board and power board is illegal.
ALARM 72, Dangerous failure
Safe stop 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. Note that 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.
Troubleshooting:
When replacing an F-frame module, this will occur if the power specific
data in the module power card does not match the rest of the drive.
Please confirm the spare part and its power card are the correct part
number.
WARNING 77, Reduced power mode:
This warning indicates that the drive is operating in reduced power mode
(i.e. less than the allowed number of inverter sections). This warning will
be generated on power cycle when the drive is set to run with fewer
inverters and will remain 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 initialized to default value
Parameter settings are initialized to default settings after a manual reset.
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-load situation has been detected in the system. See parameter
group 22-2.
ALARM 93, Dry pump
A no-flow situation and high speed indicates that the pump has run dry.
See parameter group 22-2.
ALARM 94, End of curve
Feedback stays lower than the set point which may indicate leakage in
the pipe system. See parameter group 22-5.
ALARM 95, Broken belt
Torque is below the torque level set for no load, indicating a broken belt.
See parameter group 22-6.
ALARM 96, Start delayed
Motor start has been delayed due to short-cycle protection active. See
parameter group 22-7.
WARNING 97, Stop delayed
Stopping the motor has been delayed due to short cycle protection is
active. See parameter group 22-7.
WARNING 98, Clock fault
Clock Fault. Time is not set or RTC clock (if mounted) has failed. See
parameter group 0-7.
WARNING 201, Fire M was Active
Fire Mode has been active.
WARNING 202, Fire M Limits Exceeded
Fire Mode has suppressed one or more warranty voiding alarms.
WARNING 203, Missing Motor
A multi-motor under-load situation was detected, this could be due to e.g.
a missing motor.
WARNING 204, Locked Rotor
A multi-motor overload situation was detected, this could be due to e.g.
a locked rotor.
ALARM 243, Brake IGBT
This alarm is only for F Frame drives. It is equivalent to Alarm 27. The
report value in the alarm log indicates which power module generated
the alarm:
ALARM 244, Heatsink temperature
This alarm is only for F Frame drives. It is equivalent to Alarm 29. The
report value in the alarm log indicates which power module generated
the alarm:
®
MG.16.A1.02 - VLT is a registered Danfoss trademark
1 = left most inverter module.
2 = middle inverter module in F2 or F4 drive.
2 = right inverter module in F1 or F3 drive.
3 = right inverter module in F2 or F4 drive.
5 = rectifier module.
1 = left most inverter module.
2 = middle inverter module in F2 or F4 drive.
2 = right inverter module in F1 or F3 drive.
3 = right inverter module in F2 or F4 drive.
9 Troubleshooting
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