7
Instructional Leafl et
IL03901001E
Effective June 2009
DS6 series soft start controllers
EATON CORPORATION
www.eaton.com
Table 9. DS6 Basic Troubleshooting Guide
Possible Problem
Possible Solution
Fault LED illuminates during the operation of the DS6 soft start controller
Control voltage loss
Check for the following conditions: power supply failure and/or intermittent operation and volt-
age stability. Check all connections for condition and security. Verify proper size and capacity
of the power supply.
EN and heat sink temperature less than 0°C
Verify that unit temperature is not below 0°C during application of control voltage or starter
operation.
Fault LED illuminates during start ramp, TOR, or stop ramp
Mains connection open or undervoltage
Check for the following conditions: verify presence and stability of mains voltage. Check sys-
tem for phase loss. Check main breaker and/or isolation contactor and/or reversing contactors
are not open or have been cycled during starter operation, and verify proper operation. Verify
all connections for condition and security.
Motor connection open
Check for the following conditions: verify proper motor cable connections, and check for condi-
tion and security. Verify installation and integrity of motor coupling to load. Test motor for
proper condition. Check that isolation and/or reversing contactors are not open.
Heat sink temperature less than 0°C or above 80°C
Verify that unit temperature is not below 0°C or above 80°C.
Bypass contactor(s) closed during start ramp or stop ramp time
Verify that bypass contactor(s) do not close when START command is initiated and remain
open until top of ramp is achieved. Verify that bypass contactor(s) open when STOP command
or STOP RAMP command are initiated.
Bypass contactor not closed after ramp time
Verify that bypass contactor(s) close at top of ramp and remain closed until STOP command or
STOP RAMP command are initiated.
SCR fault
Verify that one or more of the SCRs are not open. Verify that one or more of the SCRs are
not shorted.
Faults
In the event of a motor stop due to a trip condition by the soft start
controller, the FAULT status LED will be illuminated (flashing). In this
case, one or more conditions found in
Table 9
may have occured.
Use standard troubleshooting techniques to determine the cause of
the trip. The DS6 does not provide any specific method of identifying
the cause of the trip.
