Cornelius QUEST ELITE 4000 Service Manual page 25

Symptom
No water dispensed,
concentrate only
No water & no con-
centrate, refrigeration
is working.
No concentrate dis-
pensed, water only.
© 2010-2014, Cornelius Inc.
Table 2
Probable Cause
A. No water in dispenser.
B. Water supply line inside refrigerated
cabinet disconnected from pump plat-
form.
C. Water solenoid located on pump plat-
form clogged or defective.
D. Main water solenoid/strainer located at
the rear of dispenser is clogged, bind-
ing or defective.
E. Water supply pressure is greater than
80 psi (5.5 bar) forcing BRIX flow con-
trol closed.
F. Freeze-up of water coil in ice bath.
A. Black service switch located on the
rear of the cabinet door in OFF posi-
tion.
B. White door switch open

C. 6.25 amp fuse inside front electrical
box blown.
D. No output from transformer.
E. Defective voltage regulator board
(VRB) located inside front electrical
box.

F. Defective dispense push button or por-
tion control board.
A. Concentrate container not fully
engaged into receptacle on pump
platform.
B. Dispense/Flush lever in FLUSH posi-
tion
C. Concentrate too cold, not properly
thawed.
D. Defective pump motor.
- 21 -
Quest Elite 4000 Service Manual
Remedy
A. Restore water.
B. Reconnect
C. Disassemble & clean solenoid.
Replace if necessary.
D. Remove & clean strainer. Confirm
24VDC is present at solenoid during
dispense. Confirm solenoid coil is not
open. Disassemble & clean solenoid.
E. Add external regulator & lower pres-
sure to 50 psi (3.5 bar).
F. Unplug dispenser & allow 2-4 hrs. to
thaw. Check operation of agitator motor
& ice bank control.
Refrigeration system may be low on
charge resulting in a deformed ice
bank & freeze-up of water coil in ice
bath.
A. Turn on switch.
B. Door switch must be closed in order to
dispense. Check switch operation &
replace if necessary.
C. Replace with 6.25, 250VAC slow blow
fuse & test.
D. Confirm transformer output of 24VAC
+/-2. Replace transformer if necessary.
E. Measure across the VDC output of the
board. There should be 28VDC pres-
ent when the dispense button is
pressed. Replace VRB if necessary.
F. Test & replace if necessary.
A. Refer to Concentrate Loading section
of this manual.
B. Move lever to DISPENSE position
C. Concentrate should be 35 to 40
°
to 4.5 C) prior to loading.
D. Replace pump motor.
Publication Number: 620048956SER
°
F (1.7