Duke DQ GEN-102, Operator’S Manual With Illustrated Parts List

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Soft Serve Freezer Model GEN-102
Error Code Description/Action Probable Cause Remedy
Main P.C.
Board
Heartbeat
L.E.D not
blinking/
U.I. Not
Energizing
Occurs if there is a
power loss to the Main
P.C. Board or a possible
U.I. Issue
1. Power Loss to Main
P.C. Board
2. Main P.C. Board Fuse
blown
3. Power Not being
supplied to U.I. Board
from main P.C. Board
4. Faulty wire
connection
1. Check control transformer for main
24 VAC power supply to main P.C.
Board.
2. Remove fuse and ohm to check for
continuity, if none replace fuse. If once
fuse is replaced and power is restored,
the Main P.C. Board L.E.D. starts
blinking however the U.I. Board does
not energize then continue with this
troubleshooting chart
3. Remove communication wire from
U.I. Board, This cable connects the
U.I. Board to Main P.C. Board. Using
a meter set to DC voltage and power
to the Main P.C. Board on, test voltage
across both Black wires. If voltage
reads about 5.96 VDC then Main P.C.
Board and the communication cable
are working properly and the problem
lies with the U.I. Board
4. If 5.96 VDC is read on the black
wires but the U.I. Board does not
light up, the issue might lie with the
communication cable, and that it is
not making a good connection with
the U.I. Board. Check the connector
on the U.I. Board for damaged pins;
also check the communication cable
for loose wires in the cable connector
(Contact H.C. Duke & Son Factory
Tech Support).
If tested to the control board ground (Large aluminum plate on upper left side of Main
Board) relay coil will read 12 VDC to ground and then zero VDC when activated, if
tested across relay coil then it will read 0 VDC if sitting idle, and 12 VDC when activated.
If a Power Failure Occurs unit will log the change of state i.e. switching to night mode
on re-start, when the unit is powered back up. The Power Failure error will be displayed
on the screen until the SELECT button is pressed acknowledging the Failure. Once the
SELECT button is pressed error will reset.
The Head Switch, Spigot Switch, Center Spigot Switch, Mix Low, and Mix Out Errors will
all Auto Reset after the problem has been rectified.
15 VQM Error Codes
(continued)