Diagnostics; General; Alarm And Fault Displays; Fault Resetting - ABB ACS 400 User Manual

Diagnostics

General

This chapter describes the various diagnostic displays of the ACS-PAN and ACS100-PAN control
panels 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 ACS100-PAN indicates alarms and faults using codes "ALxx" or
"FLxx", where xx is the corresponding alarm or fault code. The alphanumeric display of ACS-PAN
control panel shows the alarm and fault codes together with a short message.
Alarms 1-7 arise from button operation. Green LED blinks for codes greater than or equal to 10. The
faults are indicated by red LED.
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.

Fault Resetting

Faults that are indicated by a red blinking LED are reset by turning the power off for a while. Other
faults (indicated by red static LED) can be reset either from the control panel, by digital input 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 400 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 400 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.
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