Carrier 48LC Series Installation Instructions Manual page 55

VFD Diagnostics
The drive detects error situations and reports them using:
1. Green and red LEDs on the body of the drive (located
under the keypad)
2. Status LED on the control panel
3. Control panel display
4. The Fault Word and Alarm Word parameter bits
(parameters 0305 to 0309)
The form of the display depends on the severity of the
error. The user can specify the severity for many errors by
directing the drive to ignore the error situation, report the
situation as an alarm, or report the situation as a fault.
Faults (Red LED Lit)
The VFD signals that it has detected a severe error, or
fault, by:
1. Enabling the red LED on the drive (LED is either
steady or flashing)
2. Setting an appropriate bit in a Fault Word parameter
(0305 to 0307)
3. Overriding the control panel display with the display
of a fault code
4. Stopping the motor (if it was on)
5. Sets an appropriate bit in Fault Word parameter
0305- - 0307.
The fault code on the control panel display is temporary.
Pressing the MENU, ENTER, UP button or DOWN
buttons removes the fault message. The message
reappears after a few seconds if the control panel is not
touched and the fault is still active.
Alarms (Green LED Flashing)
For less severe errors, called alarms, the diagnostic
display is advisory. For these situations, the drive is
simply reporting that it had detected something unusual.
In these situations, the drive:
1. Flashes the green LED on the drive (does not apply to
alarms that arise from control panel operation errors)
2. Sets an appropriate bit in an Alarm Word parameter
(0308 or 0309)
3. Overrides the control panel display with the display
of an alarm code and/or name
Alarm messages disappear from the control panel display
after a few seconds. The message returns periodically as
long as the alarm condition exists.
Correcting Faults
The recommended corrective action for faults is shown in
the Fault Listing Table 9. The VFD can also be reset to
remove the fault. If an external source for a start
command is selected and is active, the VFD may start
immediately after fault reset.
To reset a fault indicated by a flashing red LED, turn off
the power for 5 minutes. To reset a fault indicated by a red
LED (not flashing), press RESET from the control panel
or turn off the power for 5 minutes. Depending on the
value of parameter 1604 (FAULT RESET SELECT),
digital input or serial communication could also be used
to reset the drive. When the fault has been corrected, the
motor can be started.
History
For reference, the last three fault codes are stored into
parameters 0401, 0412, 0413. For the most recent fault
(identified by parameter 0401), the drive stores additional
data (in parameters 0402 through 0411) to aid in
troubleshooting a problem. For example, a parameter
0404 stores the motor speed at the time of the fault. To
clear the fault history (all of Group 04, Fault History
parameters), follow these steps:
1. In the control panel, Parameters mode, select
parameter 0401.
2. Press EDIT.
3. Press the UP and DOWN buttons simultaneously.
4. Press SAVE.
Correcting Alarms
To correct alarms, first determine if the Alarm requires
any corrective action (action is not always required). Use
Table 10 to find and address the root cause of the
problem.
If diagnostics troubleshooting has determined that the drive
is defective during the warranty period, contact ABB
Automation Inc., at 1- - 800- - 435- - 7365, option 4, option 3. A
qualified technician will review the problem with the caller
and make a determination regarding how to proceed. This
may involve dispatching a designated service station (DSS)
representative from an authorized station, dispatching a
replacement unit, or advising return for repair.
Control Panel Cleaning
Use a soft damp cloth to clean the control panel. Avoid
harsh cleaners which could scratch the display window.
Battery Replacement
A battery is only used in assistant control panels that have
the clock function available and enabled. The battery
keeps the clock operating in memory during power
interruptions. The expected life for the battery is greater
than ten years. To remove the battery, use a coin to rotate
the battery holder on the back of the control panel.
Replace the battery with type CR2032.
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