Cornelius NITROPRO MINI Service And Preventative Maintenance Manual page 26

Nitropro Mini Service Manual
5.0 TROUBLESHOOTING (Cont.)
Table 5-3 - Compressed Air & Infusion Troubleshooting
Malfunction
No gas infusion on right side
tap (no foam in Nitro coffee)
Air compressor not turning
on
Air compressor cycling on/off
too frequently
Air compressor runs
continuously
Publication Number: 548000106SER
Possible Causes
A. Infusion air regulator in cabinet is not set
properly
B. The air compressor did not activate or is
cycling on/off
C. Sparger (infusion manifold) clogged, dirty
D. Stuck check valve
A. Malfunctioning pressure switch
B. Malfunctioning 24 Vdc power supply
C. No voltage to air compressor
D. Malfunctioning air compressor
A. Leak in the compressed air circuit
B. Air-storage relief valve not fully seating
C. Pressure switch malfunction
A. Leak in the compressed air circuit
B. Malfunctioning pressure switch
C. Air-storage relief valve not fully seating
due to obstruction
D. Air-storage relief valve worn out
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Corrective Action
A. Pull regulator knob outward, turn CW
for more air injection or CCW for less
B. See air compressor symptoms
C. Preform the weekly sanitize/cleaning
procedure (per Install-Operator manual)
D. Flush out, same as C above.
A. Check pressure switch for continuity
with zero pressure in system. If circuit is
open, replace switch
B. Confirm output voltage is 24VDC at
power supply. Replace as required
C. Measure for 24VDC at compressor,
inspect wire connections, power supply
D. If air compressor is receiving 24 Vdc,
replace it
A. Leak check circuit starting at compressor
through to air regulator in cabinet. Repair
or replace defective component
B. Pull relief valve ring and purge any
possible debris. If it continues to leak,
replace relief valve
C. Check pressure switch per Sec. 5.1.
A. Leak check circuit starting at compressor
through to air regulator in cabinet. Repair
or replace defective component
B. Check pressure switch for continuity
with zero pressure in system. If circuit is
open, replace switch
C. Pull relief valve ring and purge any
possible debris. If it continues to leak,
replace relief valve
D. Hold down relief valve stem and allow
air compressor to cycle & shut off at 80 psi.
Release stem and if it still leaks, replace
the relief valve
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