Chapter 4: Troubleshooting
Chapter 4:3
Troubleshooting
Steps
Table 17 - Troubleshooting Steps
Control Device Status Solution
Pre-start - no start
command given but
device is faulted
LED Flashing
• Reset Fault
• Allow device to cool (overload or SCR over temp),
Reset Fault
• Cycle power to device
Motor fails to start after
start command given
LED Off
• Check Control Power
• Check control circuit connections
LED ON
• Verify proper operation of fault contactor or isolation
devices
• Check connections to the motor
• Verify line power and frequency are within
specifications
LED Flashing
• Reference Table 16 for information related to
specific fault codes
Motor Attempts to start
after start command is
given but fails to reach an
up to speed condition
LED ON
• Verify proper operation of fault contactor or isolation
devices
• Verify line power and frequency are within
specifications
• Try increasing the initial torque or current limit
setting
LED Flashing
• Reference Table 16 for information related to
specific fault codes
Motor Stops abruptly and
fails to restart
LED Off
• Check for blown fuse or tripped circuit breaker
• Insure control power and start command are present
• Verify proper operation of fault contactor or isolation
devices
LED ON
• Verify proper operation of fault contactor or isolation
devices
LED Flashing
• Reference Table 16 for information related to
specific fault codes
Fault Contactor Fails to
close when power is
applied
All Conditions
• Verify wiring to coil ( the contactor should close
when power is applied to the controller)
• Verify voltage across coil (A1 to A2)
• Check resistance of coil, replace if measured open
• Verify internal contact of controller (terminals 97/98)
are properly changing state, replace controller if
contact does not operate correctly
To Next Page
Loading...
Need help?
General