Concordia XPRESS - Milk System: Cold Milk Pour

3033-015B Section 15: Troubleshooting
Concordia Xpress Technical Support Manual 15-17
2900-300B
Milk System: Cold Milk Pour
Cold milk during
milk Pour
END PROCESS
Lift front top panel and
visually verify steam
gauge measures around
13psi.
Gauge
measures
>13psi?
No
Navigate to CHECK
TEMPERATURES >
STEAM and verify the
steam temperature is
approximately 241-243F.
13-14psi should match
about 241-243F. 226-228F
should match 0psi.
Yes
Navigate to TEST
ROUTINES and open the
steam valves. Verify
steam exits nozzle for all
three valves.
Yes
Inspect the cable connectors
to the milk pump air gate for
opens, shorts, and pin
corrosion. Verify voltage is
present at connections.
Fuses
OK?
AC voltage
at relays for
steam tank?
Steam
temperature
241-243F?
Replace
transducer.
Replace the
AC drawer.
Yes
Relay
control voltage
present?
Manifold
OK?
No
Replace plungers or
manifold, as needed.
Plungers: PN 98525
Manifold: PN 2730-047
If pressure gauge is correct,
check for blockage in the
manifold to the tank fitting.
Are the
air gate tubing
and TEE
clear?
Run a milk drink
and verify the
temperature.
Temperature
correct?
Yes
No
Yes
Remove screws retaining black
gauge plate. Check tubing to air
gate assembly for milk debris
and pinched tubing. Remove
vent needles. If milk pours, there
is a blockage in the tubing or the
air gate assembly is failing.
No
Yes
END PROCESSYes
No
Replace fuses
as necessary.
PN 1342-010
No
No
Steam
temperature
226-228F?
No
Replace
gauge.
Yes
No
No
Yes
Is the
element
resistance
22ohms?
Replace element.
PN 2650-019
No
Restart unit. Yes
Yes
Clear the air gate
tubing and TEE of
debris. Verify there
is no milk debris in
the air gate
assembly.
Run milk drink
and verify
temperature.
Temperature
correct?
Remove the pump cover
inside the refrigeration
unit. Inspect the TEE and
tubing for blockages and
pinched tubing.
Verify voltages are
correct for air gate
function. The milk
pump control should
be 2.5Vdc.
Cable
pins and
connectors
OK?
Repair damaged
or corroded pins.
END PROCESS
Run milk drink
and verify
temperature.
Drink
temperature
correct?
Yes
Voltage
for milk pump
control more than
2.5Vdc?
Inspect steam
orifice, elbows and
fittings for
blockage.
Steam
fittings/orifice
clear?
No
Clean or replace
fittings.
No
Yes
Yes
No
An internal
blockage exists.
Replace the air
gate assembly.
No
END PROCESS
Run milk drink
and verify
temperature.
Drink
temperature
correct?
Yes
Replace
milk pump.
No
Reset the pump
control voltage using
the potentiometer
attached to the CPU.
Yes
Air gate
valve assembly
OK?
Replace air gate
valve.
PN 2790-137
No
Yes