
Refrigeration
GPL 6500 0109 2.02
The Refrigeration Unit
The Refrigeration Unit is comprised of a 1/3
horsepowercompressorandisahermeticallysealed
system (no service ports). The refrigerant used in
the refrigeration system is 134a and the charge is 9
ounces.The refrigerationsystemis controlledbythe
Refrigeration Driver Board. The Fusion glassfront
merchandisers are designed to operate at ambient
temperature of 55ºF to 100ºF (13ºC to 38ºC).
Refrigeration Processing:
The Refrigeration Driver Board (P/N 80492751)
maintainsthe temperature as measured by thesolid
state temperature sensor. The refrigeration unit will
be turned on at the Set Temperature plus 3ºF and
will be turned off at the Set Temperature minus 3ºF.
A minimum of 1 minute is required for both the
cycle-onand cycle-off time of the relay. This insures
the compressor is not cycled on and or off too
rapidly.
Defrost Cycle
Independentof the temperature, the relay, therefore
the compressor, will be turned off for a defrost cycle
after 120 minutes of compressor run time. The
defrost cycle will last a minimum of five minutes or
until the temperature of the cabinet exceeds 45°F
(5.5°C). The power for the evaporator fan motor is
constant and continues to operate during a defrost
cycle.
Settable Temperature Range
The temperature for this machine when dispensing
perishable food is set automatically to 36°F when
“Food” is chosen as the machine type. When selling
non-perishable products and themachinetypeisset
to “Zone”, the settable temperature range is from
37ºF to 80ºF (3ºC to 27ºC). The recommended
temperature when the machine is equipped with
bottle shelves is 42°F (5.5°C). When using the
machine to dispense typical candy and
confectionary products, the recommended
temperature is 65ºF (18ºC).
Setting the Temperature
Refer to Service Mode 40 for the procedure to set
the temperature.
Checking the Current Temperature
The temperature inside the machine can be viewed
from the outside by pressing and holding the * key
for degrees °F or # key for degrees °C.
Refrigeration Driver Board (RDB)
The Refrigeration Driver Board (P/N 80492751) is
located inside the power supply box. The RDB has
thecapabilitytomaintaintwotemperatures,however
in this design, only the lower zone is monitored.
Power and communication to operate the RDB is
supplied via the MDB connector on the logic board
usingacommunications cable. Power to operatethe
refrigeration unit is supplied to the Refrigeration
Driver Board immediately after the EMI filter and is
switched on and off by a relay on the Refrigeration
Driver Board.
Temperature Probe
The temperature probe (P/N 13600001-01) is
located in the cabinet below the bottom shelf on the
right hand side, just below the evaporator coil. The
probe is connected to JP3 on the RDB. An
unplugged or open temperature sensor probe will
display as -9ºF (-9ºC). A shorted probe will display
as 99ºF (37ºC).
For complete pin-outs of the Refrigeration Driver
Board, see the Troubleshooting Section of this
manual.
Health Control Check
Use this procedure to verify proper health control
operation.
1. Access Mode 40 and set the temperature to
food.
2. EnableHealth Shutdown in Mode 42, besureto
set all selections in the machine to on by
pressing 1** in the selection field.
3. Turn machine off.
4. Unplug the compressor. This can be done by
unplugging the 4 pin connector located on the
bottom right hand side of the power box
assembly.
5. Unplug the door switch from P2 (Service) of the
logic board to simulate door closure.
6. Let the cabinet get warm.
7. Power the machine back up and within 3
minutes the machine should go into health
shutdown. The display should now show
“Selection 1XX Out of Service”. Note: If the
cabinet is not allowed to warm long enough the
machinewillnot shut down until thetemperature
has been high for 15 consecutive minutes.
8. Turn machine off, plug the compressor back in,
turn machine back on.
9. Reset the temperature setting in Mode 40, if it
was changed in step 1.
10. Reset the Health Shutdown settingsinMode 42,
if they were changed in step 2.
11. Plug in the door switch and clear the error.