Control Board Diagnostics
20 311020Y
Control Board Diagnostics
Digital Display Messages
Relieve pressure before repair; page 7. No display does not mean that sprayer is not pressurized.
After a fault, follow these steps to restart sprayer:
1. Correct fault condition
2. Turn sprayer OFF
3. Turn sprayer ON
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
disassembly. 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 applied. (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
triggering is locked open if using
Auto-Clean 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
runnings.
High clutch current 1. Check clutch 7-pin bulkhead
connector. Clean contacts.
2. Measure 1.2 ± 0.2Ω
(LineLazer IV 3900/R300); 1.7 ±
0.2Ω (LineLazer IV 5900)
across clutch field at 70°F.
3. Replace clutch field assembly
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