Danfoss VLT FC Series Service Manual page 79

Troubleshooting
WARNING 98, Clock fault
Time is not set, or the RTC clock has failed. Reset the clock
in parameter 0-70 Date and Time.
ALARM 99, Locked rotor
The rotor is blocked.
WARNING/ALARM 104, Mixing fan fault
The fan is not operating. The fan monitor checks that the
fan is spinning at power-up or whenever the mixing fan is
turned on. The mixing-fan fault can be configured as a
warning or an alarm trip in parameter 14-53 Fan Monitor.
Troubleshooting
•
Cycle power to the drive to determine if the
warning/alarm returns.
WARNING/ALARM 122, Mot. rotat. unexp.
The drive performs a function that requires the motor to
be at standstill, for example DC hold for PM motors.
ALARM 144, Inrush Supply
A supply voltage on the inrush card is out of range. See
the bit field result report value for more details.
•
Bit 2: Vcc high.
•
Bit 3: Vcc low.
•
Bit 4: Vdd high.
•
Bit 5: Vdd low.
ALARM 145, External SCR disable
The alarm indicates a series DC-link capacitor voltage
imbalance.
WARNING/ALARM 146, Mains voltage
Mains voltage is outside valid operating range. The
following report values provide more details.
•
Voltage too low: 0=R-S, 1=S-T, 2=T-R
•
Voltage too high: 3=R-S, 4=S-T, 5=T-R
WARNING/ALARM 147, Mains frequency
Mains frequency is outside valid operating range. Report
value provides more details.
•
0: frequency too low.
•
1: frequency too high.
WARNING/ALARM 148, System temp
One or more of the system temperature measurements is
too high.
WARNING 163, ATEX ETR cur.lim.warning
The drive has run above the characteristic curve for more
than 50 s. The warning is activated at 83% and deactivated
at 65% of the allowed thermal overload.
ALARM 164, ATEX ETR cur.lim.alarm
Operating above the characteristic curve for more than
60 s within a period of 600 s activates the alarm, and the
drive trips.
MG94A502
Service Guide
WARNING 165, ATEX ETR freq.lim.warning
The drive is running for more than 50 s below the allowed
minimum frequency (parameter 1-98 ATEX ETR interpol.
points freq.).
ALARM 166, ATEX ETR freq.lim.alarm
The drive has operated for more than 60 s (in a period of
600 s) below the allowed minimum frequency
(parameter 1-98 ATEX ETR interpol. points freq.).
WARNING 200, Fire mode
The drive is operating in fire mode. The warning clears
when fire mode is removed. Refer to the fire mode data in
the alarm log.
WARNING 201, Fire mode was active
The drive has entered fire mode. Cycle power to the unit
to remove the warning. Refer to the fire mode data in the
alarm log.
WARNING 202, Fire mode limits exceeded
While operating in fire mode, 1 or more alarm conditions
that would normally trip the unit have been ignored.
Operating in this condition voids unit warranty. Cycle
power to the unit to remove the warning. Refer to the fire
mode data in the alarm log.
WARNING 203, Missing motor
With a drive operating multi-motors, an underload
condition was detected. This condition can indicate a
missing motor. Inspect the system for proper operation.
WARNING 204, Locked rotor
With a drive operating multi-motors, an overload condition
was detected. This condition can indicate a locked rotor.
Inspect the motor for proper operation.
WARNING 219, Compressor interlock
At least 1 compressor is inversely interlocked via a digital
input. The interlocked compressors can be viewed in
parameter 25-87 Inverse Interlock.
ALARM 243, Brake IGBT
This alarm is only for multi-drive systems. It is equivalent to
alarm 27, Brake chopper fault. The report value in the alarm
log indicates which drive module generated the alarm. This
IGBT fault can be caused by any of the following:
•
•
•
The report value in the alarm log indicates which drive
module generated the alarm:
Danfoss A/S © 02/2019 All rights reserved.
The DC fuse is blown.
The brake jumper is not in position.
The Klixon switch opened due to an overtem-
perature condition in the brake resistor.
1 = Left drive module.
2 = Second drive module from left.
3 = Third drive module from left (in 4-module
module systems).
4 = Fourth drive module from left (in 4-module
module systems).
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