81
Diagnostics
General
This chapter describes the various diagnostic displays of the control panel
and lists the most common causes for the particular display. If the fault cannot
be resolved by the given instructions, contact an ABB service representative.
Caution! Do not attempt any measurement, parts replacement or other
service procedures not described in this manual. Such actions will void
guarantee, endanger correct operation, and increase downtime and expense.
Alarm and Fault displays
The seven-segment display unit of 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. Green LED blinks for AL10-21,
meaning that the ACS140 cannot fully follow the control commands. The
faults are indicated by red LED.
The alarm and fault messages disappear by pressing MENU, ENTER or the
arrow buttons of the control panel. 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 ACS140 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 is still
active, the ACS140 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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