Concordia XPRESS - Water System: Water Temperature Too Low

3033-015B Section 15: Troubleshooting
Concordia Xpress Technical Support Manual 15-31
2900-300B
Water System: Water Temperature Too Low
Constant Low
Water Temp
Navigate to CHK
TEMPERATURES
> BREW WATER.
Temperature
more than
146.3F?
Is needle
on black scale
at zero?
Yes
No
Open top panel
door of unit.
Observe gauge.
Yes
No
Navigate to TEST
ROUTINES >
WATER HEATER
and active water
tank element for
15-20 seconds.
Did
gauge
change?
Yes
Did
temperature
change?
Navigate to CHK
TEMPERATURES
> BREW WATER
and observe the
water temperature.
No
No
Replace probe.
PN 2660-038
Remove enclosure
cover and measure
voltage across two
inside pins of AC
drawer connector
housing below label.
Verify water to
machine is on.
Replace faulty
gauge if
necessary.
Voltage
at
200-215?
Temperature
between
146.5-198F?
Yes
Pressure
relief valve
leaking?
Verify manual
water drain is shut.
Replace pressure
relief valve.
PN1210-043
Yes
No
No
Yes
Remove rear panel.
Navigate to TEST
ROUTINES > WATER
HEATER. Verify 24Vdc on
lower terminals of lower
relays on rear grinder
plate when heater is
activated.
24Vdc
present?
No
Replace
AC drawer.
Yes
No
Power unit off. Unplug
unit from source and
verify AC voltage.
Power unit back on.
Verify AC voltage
present on red and
black wires to the
upper terminals on
the lower set of
relays.
Verify main
harness
connections to
backplanes.
Harness
OK?
Reconnect/repair/
replace harness.
Yes
AC
voltage
present?
Replace
AC drawer.
No
Yes
AC
voltage at
element?
Power unit down.
Check fuses for
blown fuse.
No
Yes
Check element
resistance.
Replace and
retest.
No
Replace AC
drawer.