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PROBLEM
Brix Problem
Pump Inoperative
Machine continues to
dispense after dis-
pense button is
released or dis-
penses without opera-
tor input
© 2004, IMI Cornelius Inc.
PROBABLE CAUSE
•
Water supply pressure too low,
less than 20 psi (1.4 bar) flowing
water pressure fluctuates sharply
•
Water flow control binding or
spring is defective
•
Improperly thawed concentrate.
Brix changes as the concentrate
temperature changes (concen-
trate becomes thinner as temper-
ature rises)
•
Pump motor defective
•
No power to transformer or no
28VAC output from transformer
•
Defective voltage regulator board
(VRB) located inside front electri-
cal box
•
Defective dispense control board
(Push button or portion control)
•
Push button or portion control pad
stuck in on position
•
Relay on voltage regulator board
(VRB) stuck on.
- 37 -
Quest Juice Training Manual
REMEDY
•
Correct water supply problem to
ensure a constant 50 psi (3.5 bar)
flowing to the dispenser
•
Clean and/or replace parts as nec-
essary
•
Concentrate should be 35-40°F
(1.7-4.5°C) prior to loading
•
28VDC should be present at pump
motor during dispense. If voltage is
present and motor does not start,
replace pump motor
•
Confirm transformer has line voltage
present on primary side. If no
28VAC output from the secondary
replace transformer
•
Confirm board produces 28VDC
present when the dispense button is
pressed (refer to the Electrical Box
Wiring Diagram for VDC output loca-
tion). Replace VRB if necessary
•
Test and replace if necessary
•
Disconnect the wire harness from
the rear of the portion control and
close the door. If unit does not dis-
pense on its own the dispense con-
trol board is bad (stuck on)
•
Disconnect the 4-wire harness from
the lower right corner of the VRB. If
the unit continues to dispense on its
own the VRB is defective (relay
stuck on)
Publication Number: TP00968
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