ABB ACS 501 - Page 52

Chapter 5 – Fault Tracing
ACS 501 Installation & Start-up Manual 5-5
8 OVER CURR1 The output current has
exceeded 265% I
N
. This can be
caused by a short circuit or
ground fault in the motor,
motor cable, or in the ACS 501.
Too short acceleration time
may also cause an overcurrent
trip.
• The number after the notice
tells what overcurrent
protection circuit has tripped.
Refer to Figure 5-3 at the end
of this chapter.
9 OVER VOLT DC bus voltage has exceeded
135% nominal voltage.
Overvoltage is generally
caused when the motor runs as
a generator in drives where the
load inertia is extremely high
and the deceleration time is set
low.
• Use longer deceleration time
or
• Use coasting stop function if
it is compatible with the
application.
• If short deceleration time is
needed, use Dynamic
Braking Device.
10 UNDER V 1 DC bus voltage has gone below
65% of V
N
. Most common
reason for low voltage trip is
failure in the supply voltage,
loss of phase, or “brown out”
condition.
• Check supply voltage.
• If supply voltage was
adequate, an internal failure
has occurred. Contact ABB
Technical Support.
11 AI < MIN Analog input is less than the
minimum as set by Parameters
10.5.1 and 10.5.5.
Input reference has failed or
control wire is broken. Check
the reference circuit.
16 PWR RNGE Power range programming
does not match after replacing
the Control Interface or Motor
Control Cards.
• Check the power range
programming on Motor
Control Card.
• Remove power, wait one
minute, then restore power. If
the fault persists, contact
ABB Technical Support.
19 IN COMMS Failure in serial communication
within the Control Interface
and/or Motor Control Cards.
• Check the cabling between
Control Interface and Motor
Control Cards.
• If the fault persists, contact
ABB Technical support.
20 CON INT This fault is related to
components in the Control
Interface Card.
• Remove power, wait one
minute, then restore power.
• If the problem persists, call
ABB Technical Support.
Record the specific fault
code, you may be asked for
it.
Fault Message Possible Cause Remedy