Product manual

Series B900-N and B900SW-N Manifold Mounted Electric Guns

Part 1041221B

E 2006 Nordson Corporation

Cleaning Nozzles (contd)

Problem Possible Cause Corrective Action

5. Gun fails

to heat

Poor electrical connections Check all wires and wire

terminations in the output

connector and RTD circuit and

repair as needed. Refer to the

wiring diagram. With the system

power off, disconnect the gun

cordsets from the melter. Check

for heater and RTD continuity

through the wires to gun. Also

check the heater from wire to

ground to ensure that a wire is not

grounded. Replace if there is no

continuity or if a heater wire is

grounded.

Incorrect system settings Verify system settings. Refer to

the melter manual.

Defective heater or RTD Check the resistance of the RTD

and heater across the appropriate

pins on the gun cordset. If the

resistance is not correct, replace

the RTD or heater. Refer to the

wiring diagram and resistance

data.

6. Gun

overheats

Incorrect system voltage Ensure that system voltages

match.

Temperature settings too high Check the component

temperature settings.

Defective RTD Unplug the gun cordset and verify

that the RTD connections are

secure. If the connections are

secure, check the continuity and

resistance of the RTD across the

RTD pins on the cordset. If there

is no continuity, replace the RTD.

Refer to the wiring diagram.

Continued...