Carrier WeatherExpert 48LC Series Service And Maintenance Instructions page 54

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 re-
port 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 advi-
sory. For these situations, the drive is simply reporting that it de-
tects 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
Table 29. The VFD can also be reset to remove the fault. If an ex-
ternal 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 flash-
ing), 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 parame-
ter 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 correc-
tive action (action is not always required). Use Table 30 to find
and address the root cause of the problem.
If diagnostics troubleshooting has determined that the drive is de-
fective 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 re-
garding how to proceed. This may involve dispatching a designat-
ed 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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