AIRLESSCO SP200 - Manual (Page 24)

Pressure Control Switch Diagnostics
24 3A0997F
Pressure Control Switch Diagnostics
SP200, Mustang 2400, SP300, Mustang 3100
If pressure control switch diagnostics reveal a damaged
pressure control, replace it with the correct Pressure
Control Switch Kit, see page 26. SP200 and Mustang
2400 sprayers have different pressure control kits
because stall pressure is preset at the factory.
1. Unplug power cord and Relieve Pressure, page 10.
2. If paint is leaking from pressure control switch
between pressure control knob and base, replace
pressure control switch.
3. SP300 and Mustang 3100: Remove front cover,
yoke, and pins. Disconnect pressure control switch
connector from control board.
SP200 and Mustang 2400: Remove enclosure and
disconnect pressure control switch connector from
control board. Use finger to support control board
when removing pressure control switch connector.
4. Use ohmmeter to check for no continuity between
sprayer ground and both pressure control terminals
in connector. If either pressure control switch lead is
shorted to ground, pressure control switch wires
have been pinched to ground during assembly and
pressure control switch needs to be replaced.
5. Use Ohmmeter to measure across two terminals in
pressure control connector. No continuity or open
circuit should exist when pressure control knob is at
lowest pressure setting (full counter-clockwise).
Replace pressure control switch if continuity exists.
6. Using ohmmeter to measure across two terminals in
pressure control connector. Continuity or closed cir-
cuit should exist when pressure control knob is set
at maximum pressure (full clockwise). Replace
pressure control switch if no continuity exists.