Graco 254986 Troubleshooting Manual

Flow Switch
Air
Compressor
Control Board
Exhausted
Air
ROTORY
SWITCH
Red High
Yel. Med.
Wht. Com.
Blk. Off
Blu. Prime
Grn. Low
The Flow Switch should
remain open and have no
effect while the rotary switch
is in the prime mode. If the
dump valve remains closed
check the gun and air hose for
leaks, if no leaks are found,
unplug the flow switch from
the control board. If the dump
valve opens, replace flow
sensor kit 234232. If the dump
valve still remains closed
check the dump valve for a
blockage and the Mac Air
Valve for a stuck spool valve.
Gun Valve
No Coil Voltage. This will allow air to enter the
top Black air hose and force the dump valve
open and allow material to be pumped back to
the supply container.
Air
Regulator
0-125psi
Control Board must
see 30psi to operate!
1030FC Electrical and Air Ladder Diagram
Rotary Switch in the Prime Mode .
Thermistor
Engine
Power
Engine
12-18VAC
When the rotary switch is in the Prime position the Control Board
will send out 8-12VDC to the clutch and the pump will engage
and prime the system. Note: The dump valve remains open.
Air
Blue
Black
Transducer:
Sends a signal to the control board for material
pressure and protects the sprayer from over
pressurizing. Shuts pump down at 1000psi!
Clutch Coil
Not
Used
Pinion
Assembly
245399
Dump Valve
287127
Flow Sensor Kit
234232
15B671
234234
Mac Air Valve
15B683
22

Graco 254986 Specifications

General

Brand	Graco
Model	254986
Category	Paint Sprayer
Language	English