Cornelius MILLENNIUM MJ41-6PB Installation & Service Manual page 13

TROUBLESHOOTING GUIDE
Problem
UNIT DISPENSING
CONCENTRATE ONLY NO
WATER TO ALL VALVES
FROM SINGLE VALVE
UNIT WILL NOT DISPENSE
WATER OR
CONCENTRATE
FROM SINGLE VALVE,
UNIT IS DISPENSING
CONCENTRATE ONLY
Probable Cause
No water reaching dispenser
from the water supply line.
Water pressure over 100 psi or
7 bar. High pressure will not
allow the water solenoids to
open.
Freeze up of water coil.
Inoperative or defective push
button switch, or portion
control board.
Defective Voltage Regulator
(VRB) board.
Inoperative water valve
solenoid coil.
Solenoid makes clicking
sound when energized, but
still does, not function.
Flow control binding or
defective.
12
Remedy
Check line to see if the water is shut
off at the source.
Install regulator onto incoming water
line to reduce the pressure to
between 30 and 80 psi. (2-5- bar).
Refer to the Refrigeration System
Troubleshooting section.
Check for loose or broken wire
connections at the switch. Check the
continuity of switch. Replace as
needed.
The VRB boards are contained in the
electrical box mounted on the
refrigeration deck.. There is one for
each valve.
CAUTION: Access to this panel
requires the removal of the upper
bonnet while the dispenser is
energized and operational.
Check the power input for 26 VAC
and the output for 28 VDC.
Check to see all wire connections are
secured at the coil. Check power for
26 VDC. If power is present, coil
maybe defective , replace as needed.
Armature maybe stuck, disassemble
and check function. Return spring
could also be defective replace as
needed.
Disassemble the coil assembly and
check plunger seal for defects.
Replace as required. Inspect valve
seat for restrictions.
Disassemble flow control assembly
and check the spool and sleeve
assembly . Be sure the spool moves
freely within the sleeve and there are
no restrictions