Danfoss VLT AQUA Drive FC 202 Operating Instructions Manual page 120

Troubleshooting
WARNING 60, External interlock
External interlock has been activated. To resume normal
operation, apply 24 V DC to the terminal programmed for
external interlock and reset the frequency converter (via
serial communication, digital I/O, or by pressing [Reset]).
WARNING 62, Output frequency at maximum limit
The output frequency is higher than the value set in
4-19 Max Output Frequency.
ALARM 64, Voltage Limit
The load and speed combination demands a motor
voltage higher than the actual DC-link voltage.
WARNING/ALARM 65, Control card over temperature
The cut-out temperature of the control card is 80 °C.
Troubleshooting
•
Check that the ambient operating temperature is
within the limits.
•
Check for clogged filters.
•
Check the fan operation.
•
8 8
Check the control card.
WARNING 66, Heat sink temperature low
The frequency converter is too cold to operate. This
warning is based on the temperature sensor in the IGBT
module.
Increase the ambient temperature of the unit. Also, a
trickle amount of current can be supplied to the frequency
converter whenever the motor is stopped by setting
2-00 DC Hold/Preheat Current at 5% and 1-80 Function at
Stop.
Troubleshooting
The heat sink temperature measured as 0 °C could indicate
that the temperature sensor is defective, causing the fan
speed to increase to the maximum. This warning results if
the sensor wire between the IGBT and the gate drive card
is disconnected. Also, check the IGBT thermal sensor.
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. 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 temperature
The temperature sensor on the power card is either too
hot or too cold.
Troubleshooting
•
Check the operation of the door fans.
•
Check that the filters for the door fans are not
blocked.
•
Check that the gland plate is properly installed
on IP21/IP54 (NEMA 1/12) frequency converters.
118
Operating Instructions
ALARM 70, Illegal FC configuration
The control card and power card are incompatible. To
check compatibility, contact your Danfoss supplier with the
type code of the unit from the nameplate and the part
numbers of the cards.
ALARM 72, Dangerous failure
STO with trip lock. Unexpected signal levels on safe stop
and digital input from the VLT
112.
WARNING 73, Safe Stop auto restart
Safe stopped. With automatic restart enabled, the motor
could 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.
WARNING 77, Reduced power mode
The frequency converter is operating in reduced power
mode (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 has an incorrect part number or is not
installed. The MK102 connector on the power card could
not be installed.
ALARM 80, Drive initialised to default value
Parameter settings are initialised to default settings after a
manual reset. To clear the alarm, reset the unit.
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
ALARM 93, Dry pump
A no-flow condition in the system with the frequency
converter operating at high speed may indicate a dry
pump. parameter 22-26 Dry Pump Function is set for alarm.
Troubleshoot the system and reset the frequency converter
after the fault has been cleared.
ALARM 94, End of curve
Feedback is lower than the set point. This may indicate
leakage in the system. parameter 22-50 End of Curve
Function is set for alarm.
Troubleshooting
Danfoss A/S © Rev. 06/2014 All rights reserved.
®
PTC Thermistor Card MCB
•
Troubleshoot the system and reset the frequency
converter after the fault has been cleared.
•
Troubleshoot the system and reset the frequency
converter after the fault has been cleared.
MG20Y202