lancer 85-3322, Installation And Service Manual

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would not restart immediately when power is re-established. There is a restart delay circuit
[approximately five (5) minutes] built into the ice bank control to prevent the compressor from
starting under pressure. This feature protects the compressor from premature failure.
The unit has a “lift out” refrigeration deck. The compressor, condenser, fan and agitation motors,
evaporator, and ice bank control system are mounted on a common deck plate. The deck is
attached to the insulated tank assembly in the back of the unit above the water bath compartment.
A removable grill mounted to the top cover provides access to the deck components. The
refrigeration deck assembly can also be separated from the unit by first removing the two doors,
followed by removing the top cover of the unit. After removing the mounting hardware, the deck can
be lifted up and out of the unit.
3.4 ELECTRICAL SYSTEM
WARNING
THIS UNIT MUST BE ELECTRICALLY GROUNDED TO AVOID POSSIBLE FATAL ELECTRICAL
SHOCK OR SERIOUS INJURY TO THE OPERATOR. THE POWER CORD IS PROVIDED WITH
A THREE PRONG GROUNDED PLUG. IF A THREE HOLE GROUNDED OUTLET IS NOT
AVAILABLE, USE AN APPROVED METHOD TO GROUND THE UNIT.
The unit’s power cord plugs directly into the transformer box located on the front, left corner of the
dispenser, behind the splash plate. The transformer box contains the transformer. The transformer
supplies 24 VDC power to the CPU (PN 52-2927). A jumper harness from the transformer box
connects the supply line power to the compressor deck.
The transformer, compressor, agitator, and condenser fan motor have internal circuit protection. The
24 VDC transformer has a manual reset button located on the side of the transformer.
3.5 ELECTRONIC SYSTEM
The dispenser’s electronic systems control all of the dispenser functions. The refrigeration system
is controlled by an electronic Ice Bank Controller located on the compressor deck. A printed circuit
board, located in the doors, operates the front display panel light and relays membrane switch
information to the electronics box. All other functions are controlled by the electronics box located
behind the splash plate. Sensors located in the refrigerated product compartment feed status
information to the electronics box which continuously monitors dispenser functions.
A. Water Solenoid/Flow Meter
(1) Inlet water is controlled by a combination solenoid valve/flow meter. When the dispense
mode is activated, the solenoid opens and water flows through the water coil, solenoid valve
and integral flow meter until it exits at the front of the unit. Each package slot has a
stainless nipple that connects to the mixer of the concentrate package when the package is
installed.
(2) The flow of water activates the integral digital flow meter which sends a pulse to the
microprocessor. The microprocessor continuously monitors the flow rate and adjusts the
concentrate drive motor to correct for any variations in flow rate due to pressure variations.
There is a flow control washer in the connecting tube, downstream from the solenoid
valve/flow meter that limits the flow rate to 1.5 ounces per second, in case there is excessive
water pressure at the installation site.
B. Lighted Front Display
The front door display is illuminated by high intensity LEDs. The printed circuit board is
located in the door below the light reflector.
C. Electronic Ice Bank Controller
The ice bank controller housing is mounted on the compressor deck. It connects to a probe
that is mounted to the evaporator coil. The probe allows the controller to measure the
difference in resistance between water and ice, and shuts the compressor off when the ice
bank grows enough to cover the probe. The printed circuit board inside the housing uses an
edge connector so that it can be easily serviced.
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