18
Checking the Normal PCB Operation
THE ELECTRONIC ICE BANK CONTROL (EIBC)
Terminal block has AC line voltage and should be covered with tape. Tape should cover bare electrical connections to
prevent electrical shock.
!
WARNING
1.
Turn power OFF or insure that power has been
disconnected from dispenser
2.
Check condition of 0.5 amp fuse at location shown in
diagram to the right. If fuse is blown, trace cause of short
in valve wire harness and associated 24 VAC lines and
replace fuse. If fuse is good, continue with next step.
3. Disconnect leads from the terminal block that connect to the
PCB, noting their specific location for reconnection.
4. Disconnect both the Ice Bank probe (J2) and the
Carbonator probe (J3) (if equipped) connections from
board.
5.
Use a short copper wire, paper clip, or other means to short
the Ice Bank probe terminals (J2) on the PCB by touching
all three (3) pins together.
6. Set Ohm test meter to measure continuity.
7.
Reconnect power or turn dispenser ON.
8.
Observe time and check continuity of the PCB screw lug
connections:
9. Turn electrical power OFF for 15 seconds and then back ON again to reset Carbonator timer. Again, measure continuity of the
PCB screw lug connections
•
Terminal 3 to 4 (Carbonator): During the first 2.5 to
3.5 minutes there should be continuity. After 2.5 to 3.5
minutes, there should be NO continuity.
•
Terminal 2 to 1 (Compressor): During first 4 to 6
minutes, there should be NO continuity. After 4 to 6
minutes, there should be continuity. There should be
NO continuity from 2 to 1.
•
You should be able to hear a “click” sound of the relay
closing when the time delay ends.
•
Terminal 3 to 4: There should be continuity. Use a short copper wire, paper clip, or other means to short the Carbonator
probe terminals (J3) on the PCB by touching all three (3) pins together. This should be done before the 2.5 to 3.5 minute
time limit has elapsed. Measure the continuity again between Terminal 3 to 4: There should be
NO
continuity.
10.
If all the above work as noted, then the board is functioning properly. Remove tape and reconnect board. If any non-conformities
are found, the PCB must be replaced (PN 52-1423/01).
