ALARM 67, Option module configuration has changed
One or more options have either been added or removed
since the last power-down. Check that the configuration
change is intentional and reset the unit.
ALARM 68, Safe stop activated
STO has been activated.
Troubleshooting
•
To resume normal operation, apply 24 V DC to
terminal 37, then send a reset signal (via bus,
digital I/O, or by pressing [Reset]).
ALARM 69, Power card temperaturePower card
temperature
The temperature sensor on the power card is either too
hot or too cold.
Troubleshooting
•
Check the operation of the door fans.
•
Make sure that the filters for the door fans are
not blocked.
•
Check that the connector plate is properly
installed on IP21/IP54 (NEMA 1/12) adjustable
frequency drives.
ALARM 70, Illegal FC configuration
The control card and power card are incompatible.
Troubleshooting
•
Contact the supplier with the type code of the
unit from the nameplate and the part numbers of
the cards to check compatibility.
ALARM 72, Dangerous failure
Safe stop with trip lock. Unexpected signal levels on safe
stop and digital input from the VLT
®
PTC Thermistor Card
MCB 112.
WARNING 73, Safe stop auto restart
Safe stop. 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 do not match the
detected number of active power units. When replacing an
enclosure size F module, this occurs if the power-specific
data in the module power card does not match the rest of
the adjustable frequency drive.
Troubleshooting
•
Confirm that the spare part and its power card
are the correct part number.
WARNING 77, Reduced power mode
This warning indicates that the adjustable frequency drive
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 adjustable frequency
drive 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 initialized to default value
Parameter settings are initialized to default settings after a
manual reset.
Troubleshooting
•
Reset the unit to clear the alarm.
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 92, No-Flow
A no-flow condition has been detected in the system.
Parameter 22-23 No-Flow Function
is set for alarm.
Troubleshooting
•
Troubleshoot the system and reset the adjustable
frequency drive after the fault has been cleared.
ALARM 93, Dry pump
A no-flow condition in the system with the adjustable
frequency drive operating at high speed may indicate a
dry pump.
Parameter 22-26 Dry Pump Function
is set for
alarm.
Troubleshooting
•
Troubleshoot the system and reset the adjustable
frequency drive after the fault has been cleared.
ALARM 94, End of curve
The feedback is lower than the setpoint. This may indicate
leakage in the system.
Parameter 22-50 End of Curve
Function
is set for alarm.
Troubleshooting
•
Troubleshoot the system and reset the adjustable
frequency drive after the fault has been cleared.
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
•
Troubleshoot the system and reset the adjustable
frequency drive after the fault has been cleared.
ALARM 96, Start delayed
Motor start has been delayed due to short-cycle
protection.
Parameter 22-76 Interval between Starts
is
enabled.
Troubleshooting
•
Troubleshoot the system and reset the adjustable
frequency drive after the fault has been cleared.
Warnings and Alarms
VLT
®
HVAC Drive FC 102
132
Danfoss A/S © 08/2014 All rights reserved.
MG11F522
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Summary of Contents for VLT HVAC Drive FC 102
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