Hitachi GMAX 309411E - Manual (Page 15)

psi
bar
MPa
15 309411
Pressure Control Repair
Digital Display Messages
Relieve pressure before repair; page 6. No display does not mean that sprayer is not pressurized.
DISPLAY SPRAYER
OPERATION
INDICATION ACTION
No Display Sprayer may be pressurized. Loss of power or display
not connected Check power source. Relieve
pressure before repair or dis-
assembly. Verify display is
connected.
Sprayer may be pressurized. Pressure less than
200 psi (14 bar, 1.4 MPa) Increase pressure as needed
Sprayer is pressurized. Power is ap-
plied. (Pressure varies with tip size and
pressure control setting.) Normal operation Spray
Sprayer stops. Engine is running. Exceeded pressure limit Remove any filter clogs or
flow obstructions. Make sure
gun trigger is locked open if
using AutoClean valve.
Sprayer stops. Engine is running. Pressure transducer faulty,
bad connection or broken
wire. Check transducer connections
and wire. Replace transducer
or control board, if necessary.
Sprayer stops. Engine is running. High clutch current 1. Check clutch 7–pin bulk-
head connector. Clean
contacts.
2. Measure 1.7
±
0.2
Ω
across clutch field at 70 _ F
3. Replace clutch field as-
sembly
Sprayer stops. Engine is running.
Display alternates E=06. High clutch temperature 1. If clutch is new, let spray-
er cool down and then re-
start
2. Inspect clutch. Replace
clutch if there is excessive
wear.
3. Remove pump pin, sepa-
rate pinion housing from
clutch housing. Rotate
rotor clockwise to check
for excessive drag.
Sprayer stops. Engine is running. Pressure greater than
2000 psi (138 bar, 14 MPa)
while in Flush Timer Mode 1. Flush paint from hose be-
fore operating Flush Timer
Mode
2. Verify AutoClean is acti-
vated and gun valve and
prime valve are open
After a fault, follow these steps to restart sprayer:
1. Correct fault condition
2. Turn sprayer OFF
3. Turn sprayer ON