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12
A20A Automatic Electric Airless Spray Gun
Troubleshooting
Problem
1.
Gun fails to trigger
2.
Fluid is spitting or
leaking from nozzle
3.
Fluid is leaking
around nozzle nut
4.
Fluid leaks between
gun body and
solenoid housing
and/or seat
Part 108182-03
WARNING: Allow only qualified personnel to perform the following tasks.
Follow the safety instructions in this document and all other related
documentation.
Possible Cause
Poor electrical connection
Ball and seat module installed
incorrectly
Failed solenoid coil
Dirty or worn ball and seat module
Dirty or damaged metal sealing
surfaces
Damaged O-rings
Corrective Action
Check the gun, driver, and timer
electrical connections.
Remove, clean, and reinstall the ball
and seat module. Refer to Ball and
Seat Module Replacement.
Disconnect the coil wires and check
the coil resistance with an ohmmeter.
The reading should be approximately
18 ohms. Replace the coil if the
resistance check fails. Refer to
Solenoid Coil Replacement.
Clean or replace the ball and seat
module. Refer to Ball and Seat
Module Replacement.
Clean or replace the nozzle, nozzle
nut, or ball and seat module. Refer
to Ball and Seat Module
Replacement.
Replace the O-rings. Refer to Ball
and Seat Module Replacement and
Armature Replacement.
E 2017 Nordson Corporation
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