Cornelius NITROPRO MINI Service And Preventative Maintenance Manual page 25

5.0 TROUBLESHOOTING (Cont.)
Malfunction
Dispensed coffee is too weak
Dispensed coffee is too strong
Excessive foam in Nitro
coffee
Warm drinks
Concentrate is warm, water is
cold
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Table 5-2 - Drink-Quality Troubleshooting
Possible Causes
A. Incorrect ratio DIP switch selected for
product ratio being used
B. Brix adjustment needs to be made
C. Concentrate hose or pump-motor mal-
function
A. Incorrect ratio DIP switch selected for
product ratio being used
B. Brix adjustment needs to be made
C. Water pressure too low
A. Air regulator in cabinet not set properly
B. Regulator not holding set point. Pressure
reading is drifting upwards
C. Air-storage pressure-switch malfunction
(causing high pressure)
A. Environment around dispenser too warm
B. Excessive demand on dispenser
C. Dirty condenser coil
D. Inoperative condenser fan
E. Defective ice bank control module
F. Refrigerant low due to leak in system
G. Defective ice probe
A. Cabinet fan malfunction
B. Product box too close to fan
C. Agitator motor/pump malfunction or
output is restricted
D. Loss of refrigerant charge due to leak in
system
Corrective Action
A. Confirm product ratio and select
appropriate ratio DIP switch
B. Using the ratio-tuning buttons located
behind the splash panel, press the UP
button to increase pump speed and
recheck Brix measurement
C. Verify BIB connection and harness con-
nection to concentrate pump
A. Confirm product ratio and select
appropriate DIP switch
B. Using the ratio-tuning buttons located
behind the splash panel, press the DOWN
button to decrease pump speed and
recheck Brix measurement
C. Verify water supply to unit is in range
A. Pull regulator knob outward turn CW for
more air or CCW for less air injection
B. Bleed off all pressure and reset
regulator. If after setting pressure the
gauge reading continues to drift upward,
replace the regulator
C. Inside cabinet, connect pressure gauge
to air outlet quick disconnect (see Sec.
5.1). Gauge should read 75 to 85 psi (517
to 586 kPa). If reading is outside of range,
replace pressure switch
A. Relocate dispenser
B. Add a water precooler or a second
dispenser to divide usage load
C. Clean condenser coil
D. Replace condenser fan motor
E. Test & replace if necessary
F. Repair leak and recharge system
G. Check and replace as necessary
A. Check/replace fan
B. Move product box away from fan
C. Check/replace agitator motor, check
water lines & flow
D. Repair leak, recharge system
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Nitropro Mini Service Manual
Publication Number: 548000106SER