Table of Contents
Advertisement
Symptom
Pump inoperative
Machine continues to
dispense after dis-
pense button is
released or dispenses
without operator
input.
© 2022, Marmon Foodservice Technologies Inc.
QUEST ELITE 4 Flavor Installation, Service & Decommissioning Manual
Table 4
Probable Cause
A. Pump motor defective.
B. No power to transformer or no 24VAC out-
put from transformer.
C. Defective voltage regulator board (VRB)
located inside front electrical box.
D. Defective dispense control board (Push
button or portion control).
A. Push button or portion control pad stuck
in ON position.
B. Relay on voltage regulator board (VRB)
stuck on.
- 45 -
Remedy
A. 28VDC should be present at pump motor
during dispense. If voltage is present &
motor does not start, replace motor.
B. Confirm transformer has line voltage pres-
ent on primary side. If no 24VAC output
from secondary, replace transformer.
C. Confirm board produces 28VDC present
when dispense button is pressed (refer to
Electrical Box Wiring Diagram for VDC out-
put location). Replace VRB if necessary.
D. Test & replace if necessary.
A. Disconnect wire harness from rear of portion
control and close the door. If unit does not dis-
pense on its own, dispense control board is
bad (stuck on).
B. Disconnect 4-wire harness from lower
right comer of VRB. If unit continues to dis-
pense on its own VRB is defective (relay
stuck on).
Publication Number:721Q14101MNL
Advertisement
Table of Contents
