Vfd Diagnostics (With Keypad) - Carrier 48LC 04 Controls, Start-Up, Operation And Troubleshooting

UNIT UNIT
UNIT
SIZE STATIC
VOLTAGE
(Digits OPTION
(Digit 12)
7 & 8) (Digit 10)*
Medium (2)
208/230v
(5)
High (3)
Medium (2)
460v
03
(6)
High (3)
Medium (2)
575v
(1)
High (3)
Medium (2)
208/230v
(5)
High (3)
Medium (2)
460v
04
(6)
High (3)
Medium (2)
575v
(1)
High (3)
Medium (2)
208/230v
(5)
High (3)
Medium (2)
460v
05
(6)
High (3)
Medium (2)
575v
(1)
High (3)
*If Digit 10 is a 0 or 1 there is no VFD so these parameters will default to Medium (2) option
For proper operation, there are three jumper wires that must remain
installed and the VFD must be set to the auto mode. The 3 jumpers
are shown on the unit schematic and are connected through a plug
called PL25. These jumpers set the VFD to start enabled, run
enabled, and tie the common bus together. The VFD has 2 LEDs
on its front panel to indicate operating status. See below and VFD
Troubleshooting section for details on VFD faults and alarms. The
VFD faults can be reset with the VFD keypad or through the
ComfortLink controls (AlarmsR.CUR =Yes).
The Green LED on steady indicates power is on the VFD, flashing
Green indicates an alarm condition detected. Alarms are advisory
in nature. These indicate a problem has been detected by the VFD's
diagnostics but this problem will not require a shutdown.
The Red LED steady or flashing indicates a fault condition is
detected. A fault is a significant internal situation for the VFD or
Motor. Faults will typically shutdown the motor.

VFD Diagnostics (with Keypad)

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.
Table 26 – VFD Motor Default Configurations
COMFORTLINK CCN POINT (DISPLAY MENU ITEM)
VFD1NVLT VFD1NAMP
(N.VLT) (N.AMP)
230 5.8
230 7.9
460 2.9
460 4
575 3.1
575 3.4
230 5.8
230 9.2
460 2.9
460 4.6
575 3.1
575 4.2
230 7.9
230 9.2
460 4
460 4.6
575 3.4
575 4.2
VFD1NFRQ VFD1NRPM
(N.FRQ) (N.RPM)
60 1725
60 1725
60 1725
60 1725
60 1725
60 1725
60 1725
60 1725
60 1725
60 1725
60 1725
60 1725
60 1725
60 1725
60 1725
60 1725
60 1725
60 1725
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 27. 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 28 to
find and address the root cause of the problem.
58
VFD1NPWR VFD1MAXA
(N.PWR) (MAX.A)
1.7 6.7
2.4 9.1
1.7 3.3
2.4 4.6
1.7 3.6
2.4 3.9
1.7 6.7
2.9 10.6
1.7 3.3
2.9 5.3
1.7 3.6
3.7 4.8
2.4 9.1
2.9 10.6
2.4 4.6
2.9 5.3
2.4 3.9
3.7 4.8