Specifications

112 Part Number STH12 9/10
Compressed Air System
Until repairs can be made on Compressed Air System,
place Air/CO
2
Change-over Valve in the CO
2
Operating position.
Qualifier
Probable
Cause
Corrective Action
No syrup
Air Compressor will
not cycle ON and
Air Pressure Gauge
registers 0 psi.
No power to Air
Compressor.
Verify Toggle Switch to Air
Compressor is in the ON position and
main power supply is ON.
Pressure Switch
defective.
Remove Pressure Switch Cover and
use a voltmeter across Switch to
determine whether “open” or “closed”.
If in “open” position, replace switch.
Motor defective. Verify voltage across Motor with a
voltmeter, if Motor/Pump assembly will
not operate, it is defective and should
be replaced.
Pump frozen. Same as above for Motor defective.
Air Compressor
cycles ON and OFF
and Air Pressure
Gauge readings
range between
70 psi (4.9 kg/cm
2
)
to 90 psi (6.3
kg/cm
2
).
Air/CO
2
Change-over
Valve placed in
incorrect
position.
Place Air/CO
2
Change-over Valve to
the Air or CO
2
“operating” position.
Note: If lever is positioned between
Air and CO
2
the gas supply is shut
OFF to syrup system.
Malfunction of
Syrup System.
Refer to Troubleshooting “Syrup
System”, under No syrup.
Malfunction of
Refrigeration
System.
Refer to Troubleshooting
“Refrigeration System”, under No
carbonated water at dispensing
valves (freeze up).