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Troubleshooting
10 311209J
Troubleshooting
.
Some solutions require disassembling gun. Always
relieve system pressure and disconnect electrical cable
before performing these procedures.
Problem Cause(s) Solution(s)
Material leaks from front of gun body Seat or packing is worn
Obstruction inside gun
Worn needle
Replace seat (6) or packing (47).
Remove seat (6). Check and replace
if necessary.
Check and replace needle (4a) if nec-
essary.
Material leaks from back of gun body Needle seal or packing is worn Replace seals (4c) or packing (4d).
Gun does not shut off Needle or seat is worn
Spring is broken or not installed cor-
rectly
Obstruction inside gun
Replace needle (4a) or seat (6).
Check and replace spring (14) if nec-
essary.
Remove seat (6). Check and replace
if necessary.
Gun does not heat material Loose heater wires
Loose sensor wires
Heater cartridge failed
Sensor failed
Temperature controller failed
No power to heating circuitry
Check and reconnect wire connec-
tions.
Check and reconnect wire connec-
tions.
Replace failed heater.
Replace failed sensor.
Refer to Therm-O-Flow
®
200 manual
311208 as appropriate.