ACS 160 User’s Manual
107
Diagnostics
General
This chapter describes the various alarm and fault codes and lists the most common causes for the
particular display. If the fault cannot be cured by the given instructions, contact an ABB service
representative.
Caution!
Do not attempt any measurement, parts replacement or other service procedure not
described in this manual. Such action will void guarantee, endanger correct operation, and increase
downtime and expense.
Alarm and Fault displays
The seven-segment display unit of the control panel indicates alarms and faults using codes “ALxx”
or “FLxx”, where xx is the corresponding alarm or fault code.
Alarms 1-7 arise from button operation.
The alarm and fault messages disappear when MENU, ENTER or the arrow buttons of control panel
are pressed. The message will reappear after a few seconds if the keypad is not touched and the
alarm or fault is still active.
Last three fault codes are stored into parameters 0128 - 0130. These fault memories can be cleared
from the control panel by pressing UP and DOWN buttons simultaneously in parameter set mode or
through serial communication mode by writing 0 into them.
Fault Resetting
Faults can be reset either from the control panel (by pressing START/STOP button), by digital input
(Parameter 1604) or serial communication, or switching the supply voltage off for a while. When the
fault has been removed, the motor can be started.
The ACS 160 can be configured to automatically reset certain faults. Refer to parameter group 31
AUTOMATIC RESET.
Warning!
If an external source for start command is selected and it is active, the ACS 160 may start
immediately after fault reset.
Warning!
All electrical installation and maintenance work described in this chapter should only be
undertaken by a qualified electrician. The Safety Instructions on the first pages of this manual must
be followed.
Use of the ACS 160 without control panel
If no control panel or serial communication is in use and the fault persists, check the following:
•
Motor cable connections for possible short circuit.
•
The supply voltage and cables.
•
If analogue input is used, check the DIP switch settings.
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