Graco 334530D Operation And Parts Manual page 35

Electric airless sprayers
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Problem
334530D
What to Check
Troubleshooting
How to check
6.Perform Field Short Test: Test at
large 4-pin motor field connector.
There should not be continuity from
pin 4, the ground wire, and any of
the remaining 3 pins. If motor field
connector tests fail, replace motor.
7.Check Motor Thermal Switch:
Unplug thermal wires. Set meter to
ohms. Meter should read 100k
ohms.
1-3 ohms
-
8.Reconnect motor connector(s) to
control board socket(s). Connect
power, turn ON/OFF switch ON and
control knob to 1/2 turn clockwise. If
motor does not run, replace control
board.
35

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