Graco FinishPro 311911C Repair Manual page 30

Pressure Control Replacement: FinishPro 390
Digital Display Messages: FinishPro 395
Display
No Display Sprayer stops. Power is not applied. Sprayer
may be pressurized.
3000 psi Sprayer is pressurized. Power is applied.
210 bar (Pressure varies with tip size and pressure
21 MPa control setting.)
E=02 Sprayer may continue to run. Power is
applied.
E=03 Sprayer stops. Power is applied.
E=04 Sprayer stops. Power is applied.
E=05 Sprayer does not start or stops. Power is
applied.
- - - - Power is applied.
EMPTY Sprayer stops. Power is applied.
Pressure Control Transducer:
FinishPro 395
Removal
1. Relieve pressure, page 7. Unplug sprayer.
2. Remove screws and cover.
3. Disconnect lead (E) from motor control board.
4. Remove two screws and filter housing.
5. Thread transducer lead plastic connector down
through transducer grommet.
30
Sprayer Operation
• No display does not mean the sprayer is not
pressurized. Relieve pressure before repair.
Indicates
Loss of power.
Normal operation.
Pressure greater than
4500p psi (310 bar, 31
mpa) or a pressure trans-
ducer is faulty.
Pressure transducer
faulty, bad connection or
broken wire.
Line voltage too high.
Motor fault.
Pressure is less than 200
psi (14 bar, 1.4 MPa)
Empty paint pail. Loss of
pressure.
6. Remove pressure control transducer and packing
o-ring from filter housing.
Installation
1. Install packing o-ring and pressure control trans-
ducer in filter housing. Torque to 30-35 ft-lb.
2. Thread transducer lead plastic connector up
through transducer grommet.
3. Install filter housing with two screws.
4. Connect lead to motor control board.
5. Install cover with screws.
What To Do
Check power source. Relieve
pressure before repair or disas-
sembly.
Spray.
Replace pressure control board
or pressure transducer.
Check transducer connection.
Open drain valve. Substitute
new transducer for transducer
in sprayer. If sprayer runs,
replace transducer.
Check for voltage supply prob-
lem.
Check for locked rotor, shorted
wiring or disconnected motor.
Repair or replace failed parts.
Increase pressure if desired.
Drain valve may be open.
Refill paint pail. Check for leaks
or clogged pump inlet. Repeat
Startup procedure.
311911C