64 Diagnostics
EN
ES
FI
FR
IT
PL
PT
RU
SV
TR
ZH
3291
BU DC link difference
Difference in DC voltages between
parallel-connected inverter modules.
Check the auxiliary code (format
XXXY YYZZ). “XXX” specifies the
source of the first error (see “YYY”).
“YYY” specifies the module through
which BCU control unit channel the
fault was received (
1
: Channel 1,
2
:
Channel 2,
4
: Channel 3,
8
: Channel
4, …,
800:
Channel 12).
3381
Output phase loss
Motor circuit fault due to missing
motor connection (any of the three
phases not connected).
In scalar control mode, the drive
detects fault only when the output
frequency is above 10% of the motor
nominal frequency.
Connect motor cable.
If the drive is in scalar mode and
nominal current of the motor is less
than 1/6 of the nominal output current
of the drive, set parameter
to No action [0].
3381
Output phase loss
Motor circuit fault due to missing
motor connection.
Connect motor cable.
4110
Control board
temperature
Control board temperature is too
high.
Check proper cooling of the drive and
auxiliary cooling fan.
4210
IGBT overtemperature Estimated drive IGBT temperature is
excessive.
Check ambient conditions, air flow
and fan, dust pick-up in heatsink fins
and motor power.
4290
Cooling
Drive module temperature is
excessive.
Check ambient temperature, air flow
and fan operation, dust pick-up in
heatsink. Clean whenever necessary.
42F1
IGBT temperature
Drive IGBT temperature is
excessive.
Check ambient conditions, air flow
and fan, dust pick-up in heatsink fins
and motor power.
4310
Excess temperature
Power unit module temperature is
excessive.
Check ambient conditions, air flow
and fan, dust pick-up in heatsink fins
and motor power.
4380
Excess temperature
difference
High temperature difference between
the IGBTs of different phases.
Check motor cabling and drive
module(s) cooling.
4981
External temperature 1 Measured temperature 1 has
exceeded fault limit.
Check parameter
, motor cooling and fault
limit for measured temperature 1.
4982
External temperature 2 Measured temperature 2 has
exceeded fault limit.
Check parameter
, motor cooling and fault
limit for measured temperature 1.
4991
Safe motor
temperature
The CPTC-02 module indicates
overtemperature:
• motor temperature is too high, or
• the thermistor is in short circuit.
Check the cooling of the motor.
Check the motor load and drive
ratings. Check the wiring of the
temperature sensor. Repair wiring if
faulty.
Measure the resistance of the sensor.
Replace the sensor if faulty.
5080
Fan
Cooling fan is stuck or disconnected. Check fan operation and connection.
Replace fan if faulty.
5081
Auxiliary fan broken
An auxiliary cooling fan is stuck or
disconnected.
1 – Auxiliary fan 1 broken
2 – Auxiliary fan 2 broken
Check auxiliary fan(s) and
connection(s). Replace fan if faulty.
5091
Safe torque off
Safe torque off function is active.
Check safety circuit connections
parameter
5092
PU logic error
Power unit memory is cleared.
Contact ABB.
Code
(hex)
Fault / Aux. code
aux
code visible only on
assistant control panel
and drive composer
)
Cause
What to do
ACQ80R0-R8 QIG.book Page 64 Friday, February 1, 2019 1:18 PM
