Operational Status Chart - Follett U155 Installation, Operation & Service Manual

Operational Status
The chart below shows the operational status of various parts when certain switches are turned off or accessories
are removed.
Condition
Top lid off
Rear lid off
Drain pan off
On/off switch
in off position
Beverage
switch in OFF
position
Water bath circuit board operation
The temperature sensor is hard wired directly to the circuit board. The water bath circuit board operates on 24
volts AC. The bath pump will run for 35 minutes whenever ice is dispensed or the bath calls for ice.
Optimal beverage temperature is controlled by the circuit board located in the electrical box. The board monitors
the water bath temperature and holds it to a factory setting. When the Red LED is ON, the bath solenoid, auger
motor, wheel motor and bath pump are energized. Ice will be dispensed into the water bath for 12 seconds,
then stop for 60 seconds. The pump will stay energized, and the circuit board will then monitor the water
temperature. If it is below the set point, the Green LED will come on, the Red LED light will go off, and ice will
not dispense into the water bath. If the temperature of the bath is determined to be above the set point, the Red
LED will remain on. The circuit board has a delay of 60 seconds before more ice is dispensed into the water
bath.
LED indicators:
Green - the water bath is at the set temperature.
Red - the bath temperature is above the set temperature and the bath is calling for ice.
Flashing LED indicators:
Flashing Red and Green - the circuit board has gone into an error mode:
Alternate flashing - circuit board is powered up and waiting for hopper cover and dispenser top to be
replaced.
Simultaneous flashing - the water bath did not reach set temperature in 40 minutes. Reset this error
mode by turning off power, removing top lid, drain pan or rear lid.
power on/off
switch
Pump Solenoids
off on
on on
on on
off off
on on
#1 #2
icemaker
probe
switches
15
Auger Wheel
off off
off off
off off
off off
on on
bev. bath
indicator
cold/green LED
warm/red LED
Electrical box
front view
Beverage
valves
on
on
off
off
off