Danfoss FC 300 Programming Manual page 197

Troubleshooting
ALARM 72, Dangerous Failure:
Safe Stop with Trip Lock. The Dangerous Failure Alarm is
issued if the combination of safe stop commands is unexpec-
ted. This is the case if the MCB 112 VLT PTC Thermistor Card
enables X44/ 10 but safe stop is somehow not enabled.
Furthermore, if the MCB 112 is the only device using safe stop
(specified through selection [4] or [5] in par. 5-19), an unexpec-
ted combination is activation of safe stop without the X44/ 10
being activated. The following table summarizes the unexpec-
ted combinations that lead to Alarm 72. Note that if X44/ 10 is
activated in selection 2 or 3, this signal is ignored! However,
the MCB 112 will still be able to activate Safe Stop.
Function No.
PTC 1 Warning [4]
PTC 1 Alarm [5]
PTC 1 & Relay A [6]
PTC 1 & Relay W [7]
PTC 1 & RelayA/ W [8]
PTC 1 & Relay W/A [9]
+ = activated
- = Not activated
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 78, Tracking Error:
The difference between set point value and actual value has
exceeded the value in par. 4-35 Tracking Error. Disable the
function by par. 4-34 Tracking Error Function or select an
alarm/warning also in par. 4-34 Tracking Error Function. Investi-
gate the mechanics around the load and motor, Check
feedback connections from motor – encoder – to drive. Select
motor feedback function in par. 4-30 Motor Feedback Loss
Function. Adjust tracking error band in par. 4-35 Tracking Error
and par. 4-37 Tracking Error Ramping.
FC 300 Programming Guide
X44/ 10 (DI) Safe Stop T37
+ -
- +
+ -
- +
+ -
+ -
+ -
+ -
®
MG.33.M9.02 - VLT is a registered Danfoss trademark
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 instal-
led.
ALARM 80, Drive Initialised to Default Value:
Parameter settings are initialised to default setting after a
manual (three-finger) reset.
ALARM 81, CSIV corrupt:
CSIV file has syntax errors.
ALARM 82, CSIV parameter error:
CSIV failed to init a parameter.
ALARM 85, Dang fail PB:
Profibus/Profisafe Error.
ALARM 86, Dang fail DI:
Sensor Error.
ALARM 90, Feedback Monitor:
Check the connection to encoder/ resolver option and eventu-
ally replace the MCB 102or MCB 103.
ALARM 91, Analogue Input 54 Wrong Settings:
Switch S202 has to be set in position OFF (voltage input) when
a KTY sensor is connected to analogue input terminal 54.
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:
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.
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:
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.
ALARM 245, Heatsink sensor
This alarm is only for F Frame drives. It is equivalent to Alarm
39. The report value in the alarm log indicates which power
module generated the alarm:
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.
5 5
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