Troubleshooting Chart - Graco A Series Instructions-Parts List Manual

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Service instructions given here for the electrical controls
of the Modular Fluid Commander system are for
qualified service personnel only. Service instructions for
other custom assemblies are given in separate instruc-
tion manuals.
Check only the probable causes and perform only the
possible remedies listed. If trouble cannot be corrected,
contact your Grace factory representative.
Before checking for loose or shorted wires or at-
tempting any service to modules
disconnect power supply cord from 120 volt
TROUBLESHOOTING CHART
TROUBLES:
"Power On" linht won't olow -
Dispense
"Ready"
Button won't activate svstem
More fluid dispensed than ordered
Less fluid dispensed than ordered
Fluid flow won't stop when "ready" light goes out
Totalizing indicator doesn't operate
Station Selector inoperative
120 volt circuit breaker continually "blows"
24 volt circuit breaker continually "blows"
Control module works properly but no fluid flow
Count Set Counter inoperative
PROBABLE CAUSES:
POSSIBLE REMEDIES:
Use Bypass Switch to dispense fluid
*
Blown 120 volt fuse - replace
Faulty 120 volt service outlet - check
"Power On" light burned out - replace
I I 1 I
-
Blown circuit breaker - reset
I I 1 I I I
"Ready" light burned out - r
(see separate instructions)
Faulty Dispense Button - replace
Faulty power Keyswitch - replace
Faulty connection in junction strip
Faulty Station Selector switch -
replace m
Faulty electrical connection at solenoid
valve
Faulty electrical connection
at fluid meter -
(see page 11)
Pump inoperative - servic
Solenoid valve held open -
Faulty solenoid valve - rep
Faulty Totalizer indicator
-
(see page 11)
Shorted wires in 120 volt circuit - check light connection
Shorted or loose wires in 24 volt circuit - check junction
strip
Air in supply lines - purg
Loose knob or switch - t
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*Switch is bad if circuit breakers are good but no power when switch is turned ON.
10 307-362