Concordia XPRESS - Electrical System: AC Voltage Error

3033-015B Section 15: Troubleshooting
Concordia Xpress Technical Support Manual 15-51
2900-300B
Electrical System: AC Voltage Error
AC Voltage
Failure
Power unit down. Unplug unit
from power receptacle and use a
voltmeter to measure source AC
voltage.
No
Inform customer of
electrical problem
with site power.
Request breaker
reset.
Yes
Remove the right side and rear
panels. Remove electrical
enclosure cover. Plug unit in.
Power unit on. Using a voltmeter,
measure the voltage across the
inside pins of the connector on the
front of the AC drawer.
AC
voltage
present?
No
Yes
Power unit down.
Unplug unit. Check
F1 and F2 on the
lower AC drawer.
Inspect for visual
damage.
Fuses
good?
No
Yes
Replace
fuses.
Power unit down. Unplug unit. Use
a multimeter set to ohms and
check all four relays on the rear
grinder plate for a short. Measure
across relay terminals 1 and 2 of
each relay. Verify steam and water
fuses are OK.
With drawer out, plug unit in.
Use a voltmeter and
measure the input voltage
across P1-7 and P1-8.
Line
voltage
present?
Unplug unit. Disconnect
transformer and inspect
4 pin input connection
for loose/shorted
contacts.
No
Replace main
power cable.
Connection
OK?
No
Yes
Repair connection
or replace
transformer.
No
For single-phase machines,
replace AC drawer.
PN 2630-049
For international machines,
contact Concordia Beverage
Systems for assistance.
1-800-778-0990
Yes
Water
element
shorted?
No
Verify steam tank
element is not
shorted.
YesYes
Call Concordia
Beverage Systems
for assistance.
1-800-778-0990
No
No
Is AC
voltage less than
¾ of the line
voltage?
Yes
Yes
Power unit down. Unplug unit.
Disconnect power to water
pump motor, grinders, and rear
grinder plate relays. Replace
any blown fuses in the AC
drawer and reinsert the drawer
carefully. Power unit on.
AC
voltage
present?
Yes
Replace
AC drawer.
PN 2630-049
No
Reconnect power to
both grinders. Navigate
to TEST ROUTINES
and activate each
grinder and check for
AC voltage.
Reconnect water
pump power.
Navigate to TEST
ROUTINES >
WATER PUMP
and activate the
water pump.
Yes
AC
voltage
present?
Yes
No
Replace
shorted
grinder.
Replace
water pump
motor.
Shorted
relay?
Steam
element
shorted?
Replace
steam tank
element.
PN 2650-019
Replace
shorted
relay.
Verify water tank
element is not
shorted.
No
Replace
water tank
element.
PN 2650-008
Yes
AC
voltage
present?
AC
voltage
present?