Graco SaniSpray HP 20 Operation - Repair - Parts page 26

Troubleshooting
Problem
Sprayer makes sound but
no disinfectant is sprayed
when Trigger is pulled
Sprayer makes sound
but no disinfectant is
sprayed when Trigger is
pulled (continued)
26
Cause
Sprayer is not primed.
Prime Knob is downward in PRIME
position.
Spray Tip is not in SPRAY position.
Pump Filter plugged.
Speed Control is set too low.
No or low disinfectant in FlexLiner.
Pump has reached the end of its life. Replace pump assembly.
Diagnostic Light blinks four times
when the Trigger is pulled. Indicates
a locked rotor condition.
Solution
Prime the pump. See Pressure
Relief Procedure, page 11.
Make certain there is no foam in
the cup. Wait until foam has
subsided.
Make certain there is only one
FlexLiner in the Cup Support.
Make certain there is no
damage, such as a crease, on
the top surface of the FlexLiner. If
damaged, DO NOT USE.
Make certain the Cup Lid is
properly threaded to the Cup
Support. If threads are visible
below the Cup Lid when tight,
fully remove and reinstall to the
Cup Support so no threads are
visible when tight.
Make certain the Cup Lid is
tightened to Cup Support. For
proper sprayer operation lid must
seal tightly with the cup.
Make certain the cup assembly is
properly locked on the sprayer.
Make certain all the air is out of
the FlexLiner and the VacuValve
Cap is properly closed.
Clean VacuValve Reservoir and
VacuValve Air Hole.
Replace VacuValve Cap.
Clean sprayer. See Cleaning
Sprayer, page 20.
Turn Prime Knob forward to
SPRAY position.
Turn Spray Tip to SPRAY
position.
See step 17 on page 22.
Increase speed until unit sprays.
Refill FlexLiner with disinfectant
and prime the pump. See
Refilling FlexLiner, page 19.
Replace pump assembly and/or
motor.
3A7646F