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Pressure Control Replacement: FinishPro 390
311911C 29
Motor Control Board Diagnostics: FinishPro 395
• Keep new transducer on hand for use for test.
• Refer to Digital Display Messages, page 30.
1. Relieve pressure, page 7 and unplug sprayer.
2. Remove screws and cover.
3. Turn ON/OFF switch, ON.
4. Observe LED operation and reference following
table:
CAUTION
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
Once Sprayer runs Normal operation Do nothing
Two times repeatedly Sprayer shuts down and
LED continues to blink
two times repeatedly
Run away pressure. Pressure greater than
4500 psi (310 bar) or damaged 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 transducer
in sprayer. If sprayer runs,
replace transducer
Four times repeatedly Sprayer shuts down and
LED continues to blink
four times repeatedly
Line voltage is too high Check for voltage supply prob-
lems
Five times repeatedly Sprayer does not start or
shuts down and LED con-
tinues to blink five times
repeatedly
Motor fault Check for locked rotor, shorted
wiring or disconnected motor.
Repair or replace failed parts.