Danfoss VLT HVAC Drive FC100 Service Manual page 71

Troubleshooting
frequency converters, this alarm can also be caused by the
thermal sensor in the rectifier module.
Check fan resistance
Check soft charge fuses
IGBT thermal
ALARM 30, Motor phase U missing
4 4
Motor phase U between the frequency converter and the
motor is missing.
Remove power from the frequency converter and check
motor phase U.
ALARM 31, Motor phase V missing
Motor phase V between the frequency converter and the
motor is missing.
Remove power from the frequency converter and check
motor phase V.
ALARM 32, Motor phase W missing
Motor phase W between the frequency converter and the
motor is missing.
Remove power from the frequency converter and check
motor phase W.
ALARM 33, Inrush fault
Too many power-ups have occurred within a short time
period. Let the unit cool to operating temperature.
WARNING/ALARM 34, communication fault
The fieldbus on the communication option card is not
working.
WARNING 35, Out of frequency range
This warning is active if the output frequency has reached
4-52 Warning Speed Low or 4-53 Warning Speed High. If the
frequency converter is set to closed loop [3] in 1-00 Config-
uration Mode, the warning is active in the display. If the
frequency converter is not in this mode bit 008000 Out of
frequency range in extended status word is active but
there is no warning in the display.
WARNING/ALARM 36, Mains failure
This warning/alarm is only active if the supply voltage to
the frequency converter is lost and 14-10 Mains Failure is
NOT set to [0] No Function. Check the fuses to the
frequency converter and mains power supply to the unit.
ALARM 37, Phase imbalance
There is a current imbalance between the power units
ALARM 38, Internal fault
When an internal fault occurs, a code number defined in
the table below is displayed.
Troubleshooting
Cycle power
Check that the option is properly installed
Check for loose or missing wiring
70
High Power Service Manual for Modular F Frame Drives
It may be necessary to contact your Danfoss supplier or
service department. Note the code number for further
troubleshooting directions.
No.
256-258
512-519
783
1024-1284
1299
1300
1302
1315
1316
1318
1379-2819
2820
2821
2822
3072-5122
5123
5124
5125
5126
5376-6231
ALARM 39, Heatsink sensor
No feedback from the heatsink temperature sensor.
The signal from the IGBT thermal sensor is not available on
the power card. The problem could be on the power card,
on the gate drive card, or the ribbon cable between the
power card and gate drive card.
WARNING 40, Overload of digital output terminal 27
Check the load connected to terminal 27 or remove short-
circuit connection. Check 5-00 Digital I/O Mode and
5-01 Terminal 27 Mode.
WARNING 41, Overload of digital output terminal 29
Check the load connected to terminal 29 or remove short-
circuit connection. Check 5-00 Digital I/O Mode and
5-02 Terminal 29 Mode.
WARNING 42, Overload of digital output on X30/6 or
overload of digital output on X30/7
For X30/6, check the load connected to X30/6 or remove
the short-circuit connection. Check 5-32 Term X30/6 Digi
Out (MCB 101).
®
MG90K202 - VLT is a registered Danfoss trademark
Text
0 Serial port cannot be initialised. Contact your
Danfoss supplier or Danfoss Service Department.
Power EEPROM data is defective or too old
Internal fault. Contact your Danfoss supplier or
Danfoss Service Department.
Parameter value outside of min/max limits
Internal fault. Contact your Danfoss supplier or the
Danfoss Service Department.
Option SW in slot A is too old
Option SW in slot B is too old
Option SW in slot C1 is too old
Option SW in slot A is not supported (not allowed)
Option SW in slot B is not supported (not allowed)
Option SW in slot C1 is not supported (not
allowed)
Internal fault. Contact your Danfoss supplier or
Danfoss Service Department.
LCP stack overflow
Serial port overflow
USB port overflow
Parameter value is outside its limits
Option in slot A: Hardware incompatible with
control board hardware
Option in slot B: Hardware incompatible with
control board hardware
Option in slot C0: Hardware incompatible with
control board hardware
Option in slot C1: Hardware incompatible with
control board hardware
Internal fault. Contact your Danfoss supplier or
Danfoss Service Department.