Magnum X5 Repair Manual - Control Board Diagnostics
Control Board Diagnostics
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3A1943B
Control Board Diagnostics
NOTE: Check for motor problems before replacing con-
trol board. A damaged motor may burn out a good con-
trol card.
Check for a damaged control board or pressure control
switch as follows:
1.
Relieve pressure, page 9.
2.
Unplug electrical cord.
3.
Remove cover screws and front cover.
4.
Remove yoke and guide rods.
5.
Remove gear.
6.
Remove pressure control harness from control
board. Using tip of small, flat blade screwdriver,
press tab on right side connector to release.
7.
Attach harness from a pressure control switch you
know is functioning correctly to control board.
NOTE: Pressure control switch does not have to be
installed in pump.
8.
Turn pressure control adjustment knob clockwise to
maximum pressure setting.
9.
Plug electrical cord into receptacle.
10. Turn power switch ON.
•
If motor runs, replace pressure switch.
Pressure Control Switch Kit, page 16.
•
If motor does not run, replace control board
repeat test. Control Board Kit, page 16.
Pump Diagnostics
When pump packings wear, paint begins to leak down
outside of pump. Replace pump packings at the first
sign of leaking or additional damage to drive train could
occur. Use Pump Repair Kit, page 16.
Pump Service
If sprayer continues to cycle (motor and pump run) when
the spray gun trigger is released, or if performance is
poor even with new spray tips and clean filters, the
pump inlet or outlet valve may be obstructed or worn. If
a pump is worn, replace it using Pump Repair Kit (see
List of Kits, page 16).
CAUTION
When repairing or cleaning the pump, never submerge
pump in water or allow fluid to enter pressure control.
CAUTION
When repairing or cleaning pump, never submerge
pump in water or allow fluid to enter pressure control.