User manual

149
8 - TROUBLESHOOTING & MAINTENANCE
20 Motor TOL
Motor timed overload
trip
0
The drive detected an overload
that exceeds the customer’s
dened overload setting
- Check load current demand
- Verify Motor FLA is
programmed to the correct value
- Verify TOL characteristic is
correct for the application
21 Low Temp Low temperature 0
This fault occurs if the
temperature of the heatsink falls
below -10.0 degrees C
- Verify that ambient temperature
is within the drive’s specs
- Increase the ambient
temperature if necessary
22 Ref Loss Speed reference loss 0
The drive detected the analog
input was congured to fault if
the input current went below
3.0mA
- Check physical connections for
reference signal
- Check that programming for
4-20 mA signal is correct
- Verify signal to drive is correct,
see AFN 29
23 Brk Wire
Broken wire
detection
0
The drive detected that the
potentiometer circuit wiring
opened and generated a fault
- Check wiring for loss of
connection to control terminals
- Check that a proper-value
potentiometer is installed
24 Keypad Loss Keypad loss
0
This fault occurs because of a
problem with the keypad or a
keypad connection. It occurs if
the drive detects that it cannot
read any key presses
- Check the connection from
keypad to control board. Note
that they keypad is not designed
for remote mounting
1
This fault occurs because of a
problem with the keypad, a
keypad connection, or the wrong
keypad is being used. It occurs if
the keypad ID for an S4 cannot
be read
2
This fault occurs because of a
problem with the keypad or a
keypad connection. It occurs if
the drive detects that it cannot
write to the LCD
25 Comm Loss Communication loss 0
This fault occurs when the drive
is in a serial link control path and
the amount of time since the last
Modbus comm. exceeds the time
set in parameter I/O 49
- Check connections to the
Modbus port. Adjust value of
parameter I/O 49 as needed
26 Regen Time Regen timeout 0
This fault occurs if the drive
takes more time to decelerate to a
stop than is allowed. The
timeout is determined by the
longest deceleration ramp time
(Decel 1 or Decel 2) plus the
Regen Timeout parameter
- Reduce the amount of
regenerative energy or increase
the Regen timeout parameter,
FUN 18
27 Pwr Bridge Power bridge fault 0, 1, 2
The drive detected a failure in the
output power devices
- Check for failed input power
device
28 Drive TOL Drive timed overload 0
The drive sensed an overload that
exceeded the drive rating
- Consult factory
29 Stuck Key Stuck key error 0
This fault occurs if a key press is
detected upon power-up. This
would occur because of a
defective keypad or because
someone was holding down a key
when powering-up the drive
- Check for stuck keypad and
repair or replace
- Consult factory