Danfoss VLT Aqua Drive FC 202 Operating Manual page 47

Maintenance, Diagnostics, a...
WARNING 76, Power unit setup
The required number of power units does not match the
detected number of active power units. When replacing an
enclosure size F module, this warning occurs if the power-
specific data in the module power card does not match
the rest of the frequency converter. 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 warning indicates that the frequency converter is
operating in reduced power mode (that is, less than the
allowed number of inverter sections). This warning is
generated on power cycle when the frequency converter is
set to run with fewer inverters and remains on.
ALARM 79, Illegal power section configuration
The scaling card is the incorrect part number or not
installed. Also, the MK102 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.
Troubleshooting
•
Reset the unit to clear the alarm.
ALARM 81, CSIV corrupt
CSIV (Customer-specific initialization values) file has syntax
errors.
ALARM 82, CSIV parameter error
CSIV (Customer-specific initialization values) failed to
initialize a parameter.
ALARM 85, Dang fail PB
PROFIBUS/PROFIsafe error.
ALARM 92, No flow
A no-flow condition is detected in the system.
Parameter 22-23 No-Flow Function is set for alarm.
Troubleshooting
•
Troubleshoot the system and reset the frequency
converter after clearing the fault.
ALARM 93, Dry pump
A no-flow condition in the system with the frequency
converter operating at high speed can indicate a dry
pump. Parameter 22-26 Dry Pump Function is set for alarm.
MG20MD02
Operating Guide
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 100, Derag limit fault
The Deragging feature failed during execution. Check the
pump impeller for blockage.
WARNING/ALARM 104, Mixing fan fault
The fan monitor checks that the fan is spinning at
frequency converter power-up or whenever the mixing fan
is turned on. If the fan is not operating, the fault is issued.
The mixing-fan fault can be configured as a warning or an
alarm trip by parameter 14-53 Fan Monitor.
Troubleshooting
•
WARNING 250, New spare part
A component in the frequency converter has been
replaced. To resume normal operation, reset the frequency
converter.
WARNING 251, New typecode
The power card or other components have been replaced
and the type code changed.
Troubleshooting
•
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Troubleshoot the system and reset the frequency
converter after clearing the fault.
Troubleshoot the system and reset the frequency
converter after clearing the fault.
Troubleshoot the system and reset the frequency
converter after clearing the fault.
Cycle power to the frequency converter to
determine if the warning/alarm returns.
Reset to remove the warning and resume normal
operation.
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