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