Nordson 3400 Manual page 10

B 2-8
Pump
Pump or Motor Not Working
(contd)
Problem
2. Motor fails to start
(contd.)
B2EN-02-[3-PUMP]-5
Possible Cause
Loose wire nut connections
Failed ribbon cable on motor control
board
Melters with I/O board: Failed
I/O board
Failed ribbon cable between motor
control board and motor control
interface boards
Failed motor control board or motor
control interface boards
41-3000
Issued 11/00
Corrective Action
Disconnect and lock out electrical
power to the melter. Remove the
cover on the bottom of the motor and
inspect the wire nuts connections.
Tighten any loose connections.
Disconnect ribbon cable no. 31 (red
and black) from the motor control
board and check the continuity. If
there is no continuity, replace the
ribbon cable. If there is continuity,
replace the motor. Refer to Checking
a Ribbon Cable in the Control System
section.
Check the status of the motor stop
input. If the status is not okay,
change the I/O board input.
Check the continuity of the ribbon
cables between the motor control
interface boards and the motor
control board. If there is no
continuity, replace the ribbon cable.
Disconnect the ribbon cable from a
motor control interface board and
measure the voltage on the ribbon
cable between positions 16 and 10. If
the voltage is 1.0–2.0 VDC, replace
the motor control interface board. If
the voltage is outside 1.0–2.0 VDC,
replace the motor control board.
E 2000 Nordson Corporation
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