Fault Messages - ABB ACS 501 Installation & Start-Up Manual

Chapter 5 – Fault Tracing

Fault Messages

5-4
= press once to reset fault.
= remove power to reset fault.
Fault Message
1 START/STOP The start/stop reference from
Control Interface Card is
different from the start/stop
state of the Motor Control
Card.
2 OVER TEMP The heat sink temperature is
greater than 158°F (70°C).
Restricted air flow caused by
dust or improper installation.
3 MOT STALL The ACS 501 has determined
that the motor is operating in
the stall region. Refer to
Parameter 30.1.10 (Stall Time/
Freq). The motor is not turning
because of increased load
torque. Motor may be too small
for the application.
4 MOTOR TEMP The ACS 501 determined that
the motor is overheated.
Because the temperature rise is
calculated from the motor
current and not measured
directly, the motor may be
within temperature rise
specification, especially with
long motor cables where
capacitive currents will
increase the current from the
drive.
7 UNDER LOAD The motor load has dropped
below the Supervision Limit set
by Parameters 30.1.12 and
30.1.13.
Possible Cause
• Check the connection
• If the fault persists, contact
Refer to Figure 5-2 at the end
of this chapter.
• Remove the mechanical
• If the motor shaft is rotating
• Check drive sizing, use larger
• Check the motor temperature.
• If the motor temperature is
• Fix mechanical problem
• Check motor load cycle and
ACS 501 Installation & Start-up Manual
Remedy
between Control Interface
and Motor Control Cards.
ABB Technical Support.
problem causing increased
load torque.
and the motor is not
overheating, increase stall
limit parameters.
ACS 501 and motor if
necessary.
If it is within temperature rise
specification, increase
Parameter 30.1.5 (Motor
Load Curve) and/or
Parameter 30.1.4 (Motor
Therm Time) and restart.
above rated temperature,
improve motor cooling or
resize the motor.
causing underload.
increase Parameter 30.1.12
(Underload Time) or
Parameter 30.1.13
(Underload Curve).