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 deactivated.
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 activates safe stop
without the X44/10 being activated. The following table
summarizes the unexpected 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.
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 Set-up:
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 setpoint value and actual value has
exceeded the value in
. Disable the
function by
or select an alarm/
warning also in
. Investigate the
mechanics around the load and motor. Check feedback
connections from motor – encoder – to drive. Select motor
feedback function in
4-30 Motor Feedback Loss Function
Adjust tracking error band in
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 setting after a
manual (three-finger) reset.
ALARM 81, CSIV corrupt:
CSIV file has syntax errors.
ALARM 82, CSIV par. err.:
CSIV failed to init a parameter.
ALARM 85, Dang fail PB:
Profibus/Profisafe Error.
ALARM 86, Dang fail DI:
Sensor Error.
ALARM 88, Option Detection:
A change in the option layout has been detected. This alarm
occurs when
is set to [0]
Frozen config-
uration
and the option layout for some reason has changed.
An option layout change has to be enabled in
before the change is accepted. If the change of
configuration is not accepted, it is only possible to reset
Alarm 88 (Trip-lock) when the option configuration has been
re-established/corrected.
ALARM 90, Feedback Mon.:
Check the connection to encoder/ resolver option and
eventually replace the MCB 102or MCB 103.
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 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.
Troubleshooting
FC 300 Programming Guide
MG.33.MA.22 - VLT
®
is a registered Danfoss trademark
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