10 310538
Troubleshooting
Some solutions require disassembling the automatic dispense valve. Always relieve system pressure before per-
forming these procedures.
WARNING
To reduce the risk of serious injury whenever you are instructed to relieve pressure, always follow
the Pressure Relief Procedure (page 11).
See PARTS section for the parts that need to be serviced.
Problem
Cause(s)
Solution(s)
Air leaks from automatic dis-
l
Loose air connections
Check air connections.
pense valve
Worn o-rings
Replace o-rings (90) and (100) in cylin-
der base.
Worn ring
Replace ring (110) in cylinder base.
Material leaks from front of
automatic dispense valve
Seal, spacer or retaining ring is worn
Replace rod seal (150), spacer (160),
and retaining ring (170).
Obstruction inside dispense valve
Remove seat adapter (10). Check and
replace if necessary, rod seal (150),
spacer (160), and retaining ring (170).
Worn needle
Check and replace needle (140), if
necessary.If replacing needle, you must
disassemble dispense valve.
Worn seat (Base seal models)
Check and replace seat (10) if neces-
sary.
Material leaks from automatic
di
l
b d
Seal not installed correctly
Check seal (70) and replace if neces-
dispense valve body
Seal is worn
sary.
Automatic dispense valve
does not shut off
Loose air connections
Check air connections.
does not shut off
Worn needle-seal interface
Check and replace, if necessary, needle
(140), rod seal (150), spacer (160), and
retaining ring (170).
retaining ring (170).
If replacing needle, you must disas-
semble dispense valve
Automatic dispense valve
does not shut off
Worn spring-piston interface
Disassemble dispense valve. Check
and replace, if necessary, needle (140),
and spring (370).
Automatic dispense valve
does not shut off
Spring broken or not installed correctly
Disassemble dispense valve. Check
and replace, if necessary, needle (140),
and spring (370).
Automatic dispense valve
d
t h
t
t i l
Loose heater wires
Check and reconnect wire connections.
does not heat material
Loose sensor wires
Check and reconnect wire connections.
Heater unit failed
Replace heater. See page 17.
Sensor failed
Replace sensor. See page 17.
Temperature controller failed
Replace temperature controller.
No power to heating circuitry
Apply power to heating circuitry.
Содержание Therm-O-Flow 194485
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