Control Board Diagnostics - Graco GMax 232624 Instructions-Parts List Manual

1. Fig. 11. Remove five screws (307) and
cover (322).
2. Start sprayer.
LED SPRAYER OPERATION
BLINKS
Two times Sprayer shuts down and LED contin-
repeatedly
ues to blink two times repeatedly
Three Sprayer shuts down and LED contin-
times re-
ues to blink three times repeatedly
peatedly
Four times Sprayer shuts down and LED contin-
repeatedly
ues to blink four times repeatedly
Five times Sprayer shuts down and LED contin-
repeatedly
ues to blink five times repeatedly
Six times Sprayer shuts down and LED contin-
repeatedly
ues to blink six times repeatedly
Pressure Control

Control Board Diagnostics

3. Turn ON/OFF switch ON.
4. Observe LED operation and reference following
INDICATES
Run away pressure.
Pressure greater than
4500 psi (310 bar, 31
MPa).
Pressure transducer is
faulty or missing
Generator voltage is
low
High clutch current
High clutch temperature 1. If clutch is new, let sprayer cool
table:
WHAT TO DO
1. Check pressure transducer con-
nection at control board
2. Replace pressure transducer
3. Replace control board
1. Check pressure transducer con-
nection at control board
2. Replace pressure transducer
3. Replace control board
1. Increase engine throttle
2. Check wiring connections
3. Service Honda engine alternator
1. Check clutch 5-pin bulkhead con-
nector. Clean contacts.
2. Measure 1.7 ±0.2Ω across clutch
field at 70_F
3. Replace clutch field assembly
down and then restart
2. Inspect clutch. Replace clutch if
there is excessive wear.
3. Remove pump pin, separate pin-
ion housing from clutch housing.
Rotate rotor clockwise to check
for excessive drag.
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