Chiller Troubleshooting
68 ARTC-SVX002A-EN
4290 Cooling Drive module temperature is excessive.
Check ambient temperature. If it
exceeds 40 °C/104 °F (frames R5…R9)
or if it exceeds 50 °C /122 °F (frames
R0…R9), ensure that load current does
not exceed derated load capacity of
drive. See chapter Technical data,
section Derating in the Hardware
manual of the drive.
Check drive module cooling air flow and
fan operation.
Check inside of cabinet and heatsink of
drive module for dust pick-up. Clean
whenever necessary.
42F1 IGBT temperature Drive IGBT temperature is excessive.
Check ambient conditions. Check air
flow and fan operation.
Check heatsink fins for dust pick-up.
Check motor power against drive power.
4310 Excess temperature
Power unit module temperature is
excessive.
Check ambient conditions. Check air
flow and fan operation.
Check heatsink fins for dust pick-up.
Check motor power against drive power.
4380 Excess temperature difference
High temperature difference between
the IGBTs of different phases.
Check the motor cabling.
Check cooling of drive module(s).
4981
External temperature 1
(Editable message text)
Measured temperature 1 has exceeded
fault limit.
Check the value of parameter 35.02
Measured temperature 1.
Check the cooling of the motor (or other
equipment whose temperature is being
measured).
4982
External temperature 2
(Editable message text)
Measured temperature 2 has exceeded
fault limit.
Check the value of parameter 35.03
Measured temperature 2.
Check the cooling of the motor (or other
equipment whose temperature is being
measured).
5081 Auxiliary fan broken
An auxiliary cooling fan (connected to
the fan connectors on the control unit) is
stuck or disconnected.
Check auxiliary fan(s) and
connection(s). Replace fan if faulty.
Make sure the front cover of the drive
module is in place and tightened.
Reboot the control unit (using
parameter
96.08 Control board boot) or by cycling
power.
5090 STO hardware failure
STO hardware diagnostics has detected
hardware failure.
Contact your local ABB representative
for hardware replacement.
5091
Safe torque off Programmable fault:
31.22 STO indication run/stop
Safe torque off function is active, ie.
safety circuit signal(s) connected to
connector STO is broken during start or
run.
Check safety circuit connections. For
more information, see chapter The Safe
torque off function in the Hardware
manual of the drive and description of
parameter 31.22 STO indication run/
stop (page 183).
Check the value of parameter 95.04
Control board supply.
5092 PU logic error Power unit memory has cleared. Contact your local ABB representative.
5093 Rating ID mismatch
The hardware of the drive does not
match the information stored in the
memory. This may occur eg. after a
firmware update.
Cycle the power to the drive. You may
have to be repeat this.
5094 Measurement circuit temperature
Problem
with internal temperature
measurement of the drive.
Contact your local ABB representative.
50A0 Fan Cooling fan stuck or disconnected.
Check fan operation and connection.
Replace fan if faulty.
5681 PU communication
Communication errors detected
between the drive control unit and the
power unit.
Check the connection between the drive
control unit and the power unit.
Check the value of parameter 95.04
Control board supply.
5682 Power unit lost
Connection between the drive control
unit and the power unit is lost.
Check the connection between the
control unit and the power unit.
Code (hex) Fault / Aux. code Cause What to do
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