Advanced Troubleshooting
24
312667K
Motor runs and pump cycles,
but pressure does not build up.
Intake valve or outlet valve is
not seating properly.
Remove and clean inlet valves and outlet valves.
Replace if necessary. See
List of Kits
, page 28.
Pump packings are worn or
damaged.
Check for leaking around pump.
ProX7 and ProX9:
Replace pump packings. See
List of Kits
, page 28.
X5 and X7:
Replace complete pump. See
List of
Kits
, page 28.
Specific Problem
Cause
Solution
General Problem: Excessive Pressure Build Up
Specific Problem
Cause
Solution
Prime/Spray Valve actuates
automatically, relieving
pressure through drain tube.
Pressure control switch has
pinched wires or switch is
worn.
Replace pressure control switch using
Pressure
Control Switch Kit
, page 28.
Water or paint entered
pressure control switch or
shorted control board.
Use
Pressure Control Switch Kit
, to replace
switch. See
List of Kits
, page 28.
Control board failed.
See
Control Board Diagnostics
, page 27.
Replace damaged control board using
Control
Board Kit
, page 28.
Summary of Contents for Magnum ProX7
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