Troubleshooting - Graco SaniSpray HP 20 Operation - Repair - Parts

Troubleshooting

Disconnect power and relieve pressure
before disassembling or repairing. See
Pressure Relief Procedure, page 11.
Sprayer Diagnostics
Problem
Sprayer makes no sound
when Trigger is pulled
3A7646F
Cause
Diagnostic Light does not blink when
the spray is first plugged in. Indicates
no power to the sprayer.
Diagnostic Light blinks once when
the sprayer is first plugged in.
Indicates power to the sprayer.
Diagnostic Light blinks four times
when the Trigger is pulled. Indicates
a locked rotor condition.
Troubleshooting
www.graco.com/techsupport
Solution
Verify power to the sprayer.
Replace Enclosure/
SmartControl assembly.
Replace SmartControl
Enclosure Assembly.
Motor has overheated, wait 20–
30 minutes for the motor to cool.
Motor brushes are worn, replace
motor.
Replace pump assembly and/or
motor.
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