18
Checking the Normal PCB Operation
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 dia
-
gram 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 re-connection.
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 min
-
utes, there should be NO continuity.
•
Terminal 2 to 1 (Compressor): During first 4 to 6 min
-
utes, there should be NO continuity. After 4 to 6 minutes,
there should be continuity. There should be NO continu
-
ity 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).
To prevent possible harm to the environment from improper disposal, recycle the unit
by locating an authorized recycler or contact the retailer where the product was
purchased. Comply with local regulations regarding disposal of the refrigerant and
insulation.
Dispenser Disposal