Rockwell Automation 1397 DC Drive Firmware 2.xx - Manual (Page 217)

6–7 Troubleshooting
Publication 1397-5.0 — June, 2001
Table 6.B presents a listing and description of the Drive alarms.
CTB = Control Terminal Block in the following table.
Table 6.B
Alarm Conditions
Alarm No. Alarm Name Description
001 “Brush Wear Low” The Motor brush wear detector indicates the brushes are worn, or that the customer
terminal block pins CTB–12 & CTB–14 have not been jumpered in cases where a brush
wear detector is not supplied
Other possible causes include:
• Disconnected, loosely connected or damaged motor brush wear indicator wiring
• Brush wear indicator has malfunctioned.
002 “AC Line Volt Low” The AC line voltage has fallen below 90% of the figure established in Nominal AC Line
Voltage.
Possible causes include:
• Low AC line voltage
• An incorrect value has been entered for Nominal AC Volts (P. 051)
• Blown AC line fuse(s)
003 “AC Line Vlt High” The AC line voltage rose 115% above the figure established in Nominal AC Volts (P.051)
Possible causes include:
• High AC line voltage
• Incorrect value entered for Nominal AC Volts (P. 051)
020 “Fld Loss Det Dis” Field Loss detection has been disabled through a jumper on the regulator board (J20).
NOTE: Option used only when no field exists.
030 “Contcr Not Open” The main (FN) contactor did not open following a stop. If a dynamic braking (DB) kit is
used, the DB AUX contact is wired in series with the FN AUX contact
Possible causes include:
• Disconnected, loosely connected or damaged FN, FN AUX, DB or DB AUX wiring.
• FN, FN AUX, DB or DB AUX contactor failure.
• Disconnected, loosely connected or damaged main contactor or dynamic brake control
wiring (MCR or DBCR).
031 “Contcr Not Closed” The main (FN) contactor did not close following a run or jog command. If a dynamic
braking (DB) kit is used, the DB AUX contact is wired in series with the FN AUX contact.
Possible causes include:
• Disconnected, loosely connected or damaged FN, FN AUX, DB or DB AUX wiring.
• FN, FN AUX, DB or DB AUX contactor failure.
• Disconnected, loosely connected or damaged main contactor or dynamic brake control
wiring (MCR or DBCR).
032 “Sustained Speed” Motor speed did not fall below the value set in Stop Speed Level (P. 116) in the required
period of time during a stop (automatically set to 2x the Decel Time (P. 038) setting).
Possible causes include:
• Decel Time not set properly
• Stop Speed Level (P.116) not set properly
• Incorrect speed/voltage feedback scaling
033 “Sustained Arm I” Armature current was unable to reach discontinuous conduction while stopping the Drive.
Possible causes include:
• Motor CEMF too high or line voltage too low for proper commutation
034 “Aux Contact Open” M Contactor Auxiliary contact opened unexpectedly – check contactor for proper
operation.
Alarms