Concordia XPRESS - Steam System: Check Steam Tank

Section 15: Troubleshooting 3033-015B
15-28 Concordia Xpress Technical Support Manual
2900-300B
Steam System: Check Steam Tank
CHECK STEAM
TANK Error
END PROCESS
Navigate to TEST
ROUTINES >
UPPER STEAM
PROBE or
LOWER STEAM
PROBE.
Both
probes
wet?
No
Yes
Power unit off. Drain the
steam tank and remove
both probes. Verify
probes are clean of
scale and debris.
Probes
clean?
No
Clean probes of
scale and debris.
Re-tape fittings and
re-insert into tank
body. Restart unit
and verify probe
status.
Yes
Reinsert the
probes. Check for
a short between
the probe and tank
body.
Probes
shorting?
Both
probes wet for
up to 10
minutes?
Restart unit and
allow unit to come
up to temperature.
Yes
CHECK
STEAM TANK
error
displayed?
No
Yes
Replace probe.
PN 2660-001
No
Check the connection
to the housing on the
wire harness. Inspect
the harness
connections.
Harness
OK?
No
Repair or replace
harness.
No
Drain the steam tank. Power the unit
on and measure the voltage from the
steam probes to ground. 0.5vac should
be present until the water reaches the
probes. The level should then drop to
ground when the water level reaches
the probes.
Voltage
present?
Yes
No
Yes
Check the wire
harness back to
JP7 for shorts/
opens. Verify the
cables are plugged
into the
backplanes.
Voltage
present?
No
Verify the steam
tank ground wire is
secure.
Yes
Replace CPU.
PN 2630-111
Retest for voltage
at steam tank
probes.
Call Concordia
Beverage Systems
for assistance.
1-800-778-0990
Yes
No END PROCESS
Navigate to TEST
ROUTINES > STEAM FILL
VALVE and drain the steam
tank. Remove the fill tube
from rear of the tank. Place
in cup. Activate the fill valve.
Water
filling
cup?
No
Yes
Disconnect coil from the
harness. Check for 24Vdc
at the coil harness side.
Verify the coil resistance is
at least 60 ohms.
24Vdc
present at coil
harness?
No
Yes
Replace chips U14
and U15 on CPU
assembly.
PN 1373-022
Coil
shorted?
Yes
Replace valve.
Retest.
No
Reconnect fill
tubing to tank and
retest unit.
Verify that water is
present at fill valve
input.
Water
present?
No
Check the manifold on
the water tank and the
tubing from the top of
the water tank for
blockage debris. Verify
the ferrule is open.
Yes
CHECK
STEAM TANK
error
displayed?
END PROCESS
Yes
No
Steam
tank drain
open?
No
Yes
Close manual
drain. Retest
for error.
CHECK
STEAM TANK
error
displayed?
Yes
No
CHECK
STEAM TANK
error
displayed?