Chiller Troubleshooting
70 ARTC-SVX002A-EN
6686 EFB fault 3
Fault reserved for the EFB protocol
application.
Check the documentation of the
protocol.
6882 Text 32-bit table overflow Internal fault.
Reset the fault. Contact your local ABB
representative if the fault persists.
6885 Text file overflow Internal fault.
Reset the fault. Contact your local ABB
representative if the fault persists.
7081
Control panel loss Programmable fault:
49.05 Communication loss action
Control panel or PC tool selected as
active control location for drive has
ceased communicating.
Check PC tool or control panel
connection.
Check control panel connector.
Disconnect and reconnect the control
panel.
7121
Motor stall Programmable fault: 31.24
Stall function
Motor is operating in stall region
because of e.g. excessive load or
insufficient motor power.
Check motor load and drive ratings.
Check fault function parameters.
7181 Brake resistor Brake resistor broken or not connected.
Check that a brake resistor has been
connected.
Check the condition of the brake
resistor. Check the dimensioning of the
brake resistor.
7183 BR excess temperature
Brake resistor temperature has
exceeded fault limit defined by
parameter 43.11 Brake resistor fault
limit.
Stop drive. Let resistor cool down.
Check resistor overload protection
function settings (parameter group 43
Brake chopper).
Check fault limit setting, parameter
43.11 Brake resistor fault limit.
Check that braking cycle meets allowed
limits.
7184 Brake resistor wiring
Brake resistor short circuit or brake
chopper control fault.
Check brake chopper and brake resistor
connection.
Ensure brake resistor is not damaged.
7191 BC short circuit Short circuit in brake chopper IGBT.
Ensure brake resistor is connected and
not damaged.
Check the electrical specifications of the
brake resistor against chapter Resistor
braking in the Hardware manual of the
drive.
Replace brake chopper (if replaceable).
7192 BC IGBT excess temperature
Brake chopper IGBT temperature has
exceeded internal fault limit.
Let chopper cool down. Check for
excessive ambient temperature.
Check for cooling fan failure.
Check for obstructions in the air flow.
Check resistor overload protection
function settings (parameter group 43
Brake chopper).
Check that braking cycle meets allowed
limits.
Check that drive supply AC voltage is
not excessive.
7310 Overspeed
Motor is turning faster than highest
allowed speed due to incorrectly set
minimum/maximum speed, insufficient
braking torque or changes in load when
using torque reference.
Check minimum/maximum speed
settings, parameters 30.11 Minimum
speed and 30.12 Maximum speed
.
C
heck adequacy of motor braking
torque. Check applicability of torque
control.
Check need for brake chopper and
resistor(s).
73B0 Emergency ramp failed
Emergency stop did not finish within
expected time.
Check the settings of parameters 31.32
Emergency ramp supervision and 31.33
Emergency ramp supervision delay.
Check the predefined ramp times
(23.11…23.15 for mode Off1, 23.23 for
mode Off3).
Code (hex) Fault / Aux. code Cause What to do
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