bonitron M3460D, Customer Reference Manual

Page: 17 / 32

User’s Manual
17
5.
M
AINTENANCE AND
T
ROUBLESHOOTING
Repairs or modifications to this equipment are to be performed by Bonitron approved
personnel only. Any repair or modification to this equipment by personnel not approved
by Bonitron will void any warranty remaining on this unit.
5.1.
T
ROUBLESHOOTING
5.1.1.
C
IRCULATING CURRENTS BETWEEN DRIVES
Make sure the connections are correct between the drives and the Ride-Thru
Module. If one drive is connected to the Ride-Thru Module input, circulating
currents can occur.
5.1.2.
H
EATSINK GETS EXCESSIVELY HOT OR DRIVES DO NOT BEHAVE
PROPERLY DURING NORMAL OPERATING CONDITIONS
Make sure that the connections are correct. Heat can be caused by
circulating currents between the drives.
Make sure the Ride-Thru Module is not operating in the BOOST mode during
normal conditions. See the Ride-Thru manual for more information on that
equipment.
5.1.3.
G
ROUND
F
AULTS
When using a diode isolation module with several drives and a single Ride-
Thru, some drives may trip on ground faults depending on the ground fault
sensing scheme and sensitivity. If this occurs, a separate ground fault
detector on each motor output may be needed.
5.2.
T
ECHNICAL
H
ELP
–
BEFORE YOU CALL
If possible, please have the following information when calling for technical help:
•
Serial number of unit
•
Name of original equipment supplier
•
Brief description of the application
•
Drive and motor hp or kW
•
The line to line voltage on all 3 phases
•
The DC bus voltage
•
KVA rating of power source
•
Source configuration Wye/Delta and grounding