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Status indications and fault tracing
ACS55 has two status indication LEDs, visible
through the front cover.
If the drive detects a problem, the red LED will
blink. After fixing the problem, reset by
switching the start signal off. If start is off
already, turn it first on and then off again.
See the table below for the fault codes (= the
number of LED blinks).
#
Possible causes and what to do
1
DC overvoltage (*). 1) Mains voltage is too high: Check
supply. 2) Deceleration ramp time is too short compared to
the load inertia: Increase ACC/DEC time with potentiometer.
2
DC undervoltage (*). Mains voltage is too low: Check supply.
3
Output short circuit: Switch off the power and check the motor
windings and motor cable.
4
Output overcurrent. 1) Acceleration time is too short
compared to the load inertia: Increase ACC/DEC time with
potentiometer. 2) Motor and drive sizes do not match: Check
motor.
5
Reserved
(*) Automatically reset if the AUTORESET is ON. See
Green LED
Red LED
On
Off
On
Blinking
On
1
2
Off
Blinking
Blinking
#
Possible causes and what to do
6
Analogue input value is less than 4 mA/2 V. (*) Note: This
supervision is active if AI OFFSET is ON.
7
Motor overload (I
that the motor size is suitable for ACS55. 2) Verify that setting
of MOTOR I NOM potentiometer is correct.
8
Inverter overload or excessive internal temperature: 1) Load
is too high or 2) drive cooling is insufficient.
9
Other fault. Internal error. Turn power off and on again. If
problem persists, replace the unit.
10 Parametrization fault. Note: Both LEDs will blink. DIP
switches have been moved from default setting after the drive
has been parametrized with DriveConfig tool. Put the
switches back to default position.
DIP switches
on page 14.
Description
ACS55 operates normally.
Protective function has been activated. Number of
blinks indicates the fault code.
ACS55 will reset automatically within 3 seconds. (*)
Warning! Motor starts, if start signal is on.
2
t overload): 1) Check the load, and verify
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