Pressure Control Repair
22
312496H
Motor Control Board
Diagnostics
NOTE:
• Keep a new transducer on hand to use for test.
• No display does not mean the sprayer is not pres-
surized. Before repair,
Relieve Pressure
, page 6.
1.
Remove screws (12) and cover (50).
2.
Turn ON/OFF switch ON.
3.
Observe LED operation and reference following
table:
NOTICE
Do not allow sprayer to develop fluid pressure without
transducer installed. Leave drain valve open if test
transducer is used.
LED BLINKS
SPRAYER OPERATION
INDICATES
WHAT TO DO
Never blinks
Sprayer stops. Power is not
applied. Sprayer must be pres-
surized.
Loss of power.
Check power source. Relieve pressure
before repair or disassembly.
Once
Sprayer is pressurized. Power is
applied. (Pressure varies with tip
size and pressure control set-
ting.)
Normal operation
Do nothing
Two times
repeatedly
Sprayer may continue to run.
Power is applied.
Run away pressure. Pres-
sure greater than 4500 psi
(310 bar, 31 MPa) or dam-
aged pressure transducer
Replace motor control board or pressure
transducer
Three times
repeatedly
Sprayer shuts down and LED
continues to blink three times
repeatedly
Pressure transducer is
faulty or missing
Check transducer connection. Open drain
valve. Substitute new transducer for trans-
ducer in sprayer. If sprayer runs, replace
transducer
Four times
repeatedly
Sprayer shuts down and LED
continues to blink four times
repeatedly. Power is applied.
Line voltage is too high
Check for voltage supply problems
Five times
repeatedly
Sprayer does not start or stops
and LED continues to blink five
times repeatedly. Power is
applied.
Motor fault
Check for locked rotor, shorted wiring or
disconnected motor. Repair or replace
failed parts.
Six times
repeatedly
Sprayer stops and LED blinks six
times repeatedly. Power is
applied.
Motor is too hot or there is a
fault in motor thermal device
Allow sprayer to cool. If sprayer runs cor-
rectly when cool, check motor fan function
and air flow. Keep sprayer in cool location. If
sprayer does not run when cool and contin-
ues to blink six times, replace motor.
Power is applied.
Pressure less than 200 psi
(14 bar, 1.4 MPa).
Increase pressure if desired. Drain valve
may be open.
Sprayer stops. Power is applied.
Empty paint pail. Loss of
pressure.
Refill paint pail. Check for leaks or clogged
pump inlet. Repeat Startup procedure.
Summary of Contents for ASM M2300 Plus
Page 27: ...Notes 312496H 27 Notes ...
Page 33: ...Notes 312496H 33 Notes ...
