Pump
B 2-7
E 2000 Nordson Corporation
All rights reserved
41-3000
Issued 11/00
B2EN-02-[3-PUMP]-5
WARNING: Risk of electrical shock. Failure to observe
electrical safety procedures may result in equipment damage,
personal injury, or death. Allow only qualified personnel to
perform electrical troubleshooting. Observe all high voltage
indicators.
Problem
Possible Cause Corrective Action
1. Pump not turning but motor
running
Misaligned, damaged, or loose chain
or damaged or worn sprockets
Check the motor chain and sprockets.
Refer to Motor Chain and Sprocket
Check.
2. Motor fails to start Melter not at operating temperature Wait for the time delay to expire and
the SYSTEM READY light to turn on.
Motor speed control dial set at 0 Change the setting.
Blown fuse Remove the electrical enclosure lid
and check the input power neon on
the motor control interface board. If
the neon is off, replace the fuses.
Failed motor control interface board Measure the input voltage to the
motor control board at J2-6 and J2-8
on the motor control interface board.
If you do not measure line voltage,
replace the motor control interface
board.
Failed motor drive board Measure the voltage at the motor
drive board A+ (red wire no. 31) and
A- (black wire no. 31) wires. If the
voltage is less than 10 VDC, replace
the motor drive board.
Continued on next page
Pump or Motor Not Working
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