WARNING 71, PTC 1 Safe Stop:
Safe Stop has been activated from the MCB 112 PTC Thermistor Card
(motor too warm). Normal operation can be resumed when the MCB 112
applies 24 V DC to T-37 again (when the motor temperature reaches an
acceptable level) and when the Digital Input from the MCB 112 is deac-
tivated. Warning: Automatic Restart.
ALARM 72, Dangerous Failure:
Safe Stop with Trip Lock. The Dangerous Failure Alarm is issued if the
combination of safe stop commands is unexpected. 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
unexpected combination is activation of safe stop without the X44/ 10
being activated. The following table summarizes the unexpected combi-
nations 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. X44/ 10 (DI) Safe Stop
T37
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
. Investigate 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
.
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 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 eventually 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.
6 Troubleshooting
VLT
®
AutomationDrive FC 300 Operating
Instructions
108
MG.33.AG.02 - VLT
®
is a registered Danfoss trademark
6
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