30 309421
Advanced Troubleshooting
General Problem: Excessive Pressure is Building Up
SPECIFIC PROBLEM
CAUSE
SOLUTION
Spray–Prime/Drain valve
actuates automatically,
relieving pressure
through drain tube.
Pressure control switch is worn.
Replace pressure control switch using
Pressure
Control Switch Kit
244267 (see
List of Kits
,
page 31).
Water or paint entered pressure control switch
or shorted control board.
Clean out and/or dry out, and retry. Replace if
necessary using
Pressure Control Switch Kit
244267 (see
List of Kits
, page 31).
Control board has failed.
See
Control Board Diagnostics
on page 32, and
replace control board if damaged using
Control
Board Kit
243228 (see
List of Kits
, page 31).