Cornelius QUEST ELITE QLT 2000 Operator's, Installation And Service Manual page 24

Symptom
No water & no concentrate,
refrigeration is working.
No concentrate dispensed,
water only.
Warm drinks
Water continuously drips
from nozzle in OFF mode.
Concentrate warm, water
cold.
BRIX problem
© 2013-2015, Cornelius Inc.
Probable Cause
A. Black service switch located on the rear of
the cabinet door in OFF position.
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 portion
control board.
A. Concentrate container not fully engaged
into receptacle on pump platform.
B. Dispense/Flush lever in FLUSH position
C. Concentrate too cold, not properly thawed.
D. Defective pump motor.
A. Ambient air around dispenser is too warm.
B. Excessive demand on dispenser.
C. Dirty condenser coil.
D. Inoperative condenser fan.
E. Defective Ice Bank Control.
F. Loss of refrigerant charge due to leak in
system.
A. Main water solenoid at base of unit or
water solenoid on pump platform not shut-
ting off completely.
A. Cabinet fan inoperable.
B. Agitator motor/pump inoperable or
restricted.
C. Loss of refrigerant charge due to leak in
system.
A. Water supply pressure too low, less than
20 psi (1.4 bar) flowing water pressure.
B. Water flow control binding or spring is
defective.
C. Improperly thawed concentrate. BRIX
changes as concentrate temperature
changes (concentrate becomes thinner as
temperature rises)
A. Turn on switch.
B. Door switch must be closed in order to dis-
pense. 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 present
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
°
4.5 C) prior to loading.
D. Replace pump motor.
A. Relocate dispenser.
B. Add water pre-cooler or second dispenser
C. Clean condenser coil.
D. Replace condenser fan motor.
E. Test & replace if necessary.
F. Repair leak and recharge system.
A. Clean solenoid(s), replace parts as neces-
sary (refer to Planned Maintenance sec-
tion).
A. Check/replace fan.
B. Check/replace agitator motor.
C. Repair leak & recharge system.
A. Correct water supply problem to ensure a
constant 50 psi (3.5 bar) flowing to dis-
penser.
B. Clean and/or replace parts as necessary.
C. Concentrate should be 35 to 40
°
4.5 C) prior to loading.
- 20 -
Quest Elite QLT 2000
Remedy
°
F (1.7 to
°
F (1.7 to
Publication Number: 620058442