Danfoss VLT FC Series Service Manual page 78

Troubleshooting
WARNING 76, Power unit setup
The required number of power units does not match the
detected number of active power units. If the power card
connection is lost, the unit also triggers this warning.
Troubleshooting
•
Confirm that the spare part and its power card
are the correct part number.
•
Ensure that the 44-pin cables between the MDCIC
and power cards are mounted properly.
WARNING 77, Reduced power mode
This alarm applies to only multi-drive systems. The system
is operating in reduced power mode (fewer than the
allowed number of drive modules). This warning is
generated on power cycle when the system is set to run
6 6
with fewer drive modules and remains on.
ALARM 78, Tracking error
The difference between setpoint value and actual value
exceeds the value in parameter 4-35 Tracking Error.
Troubleshooting
•
Disable the function or select an alarm/warning
in parameter 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
parameter 4-30 Motor Feedback Loss Function.
•
Adjust the tracking error band in
parameter 4-35 Tracking Error and
parameter 4-37 Tracking Error Ramping.
ALARM 79, Illegal power section configuration
The scaling card has an incorrect part number or is not
installed. Also, the MK101 connector on the power card
could not be installed.
ALARM 80, Drive initialised to default value
Parameter settings are initialized to default settings after a
manual reset. To clear the alarm, reset the unit.
ALARM 81, CSIV corrupt
CSIV file has syntax errors.
ALARM 82, CSIV parameter error
CSIV failed to initialize a parameter.
ALARM 83, Illegal option combination
The mounted options are incompatible.
ALARM 84, No safety option
The safety option was removed without applying a general
reset. Reconnect the safety option.
ALARM 85, Dang fail PB
PROFIBUS/PROFIsafe error.
ALARM 88, Option detection
A change in the option layout is detected.
Parameter 14-89 Option Detection is set to [0] Frozen config-
uration and the option layout has been changed.
76
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VLT FC Series, D1h–D8h, Da2/Db2/Da4/Db4, E1h–E4h, J8/J9
•
•
WARNING 89, Mechanical brake sliding
The hoist brake monitor detects a motor speed exceeding
10 RPM.
ALARM 90, Feedback monitor
Check the connection to encoder/resolver option and, if
necessary, replace VLT
Resolver Input MCB 103.
ALARM 91, Analog input 54 wrong settings
Set switch S202 in position OFF (voltage input) when a
KTY sensor is connected to analog input terminal 54.
ALARM 92, No flow
A no-flow condition is detected in the system.
Parameter 22-23 No-Flow Function is set for alarm.
Troubleshooting
•
ALARM 93, Dry pump
A no-flow condition in the system with the drive operating
at high speed can indicate a dry pump.
Parameter 22-26 Dry Pump Function is set for alarm.
Troubleshooting
•
ALARM 94, End of curve
The feedback is lower than the setpoint. This condition can
indicate leakage in the system. Parameter 22-50 End of
Curve Function is set for alarm.
Troubleshooting
•
ALARM 95, Broken belt
Torque is below the torque level set for no load, indicating
a broken belt. Parameter 22-60 Broken Belt Function is set
for alarm.
Troubleshooting
•
ALARM 96, Start delayed
The motor start has been delayed due to short-cycle
protection. Parameter 22-76 Interval between Starts is
enabled.
Troubleshooting
•
WARNING 97, Stop delayed
Stopping the motor has been delayed because the motor
has been running for less than the minimum time specified
in parameter 22-77 Minimum Run Time.
Danfoss A/S © 02/2019 All rights reserved.
To apply the change, enable option layout
changes in parameter 14-89 Option Detection.
Alternatively, restore the correct option configu-
ration.
®
Encoder Input MCB 102 or VLT
Troubleshoot the system and reset the drive after
clearing the fault.
Troubleshoot the system and reset the drive after
clearing the fault.
Troubleshoot the system and reset the drive after
clearing the fault.
Troubleshoot the system and reset the drive after
clearing the fault.
Troubleshoot the system and reset the drive after
clearing the fault.
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MG94A502