Hoshizaki FD-1001MWH(-C) EN - Manual (Page 34)

34
D. Bin Control
An infrared sensor is used to control the level of ice in the dispenser unit/ice storage
bin (S1 dip switch 7 in the "ON" position). The infrared sensor is the primary bin control
device. 20VDC powers the infrared sensor from the control board K6 connector. A green
power LED and a yellow ice detection LED are located on the infrared sensor. See
Fig. 1. The paddle-actuated mechanical bin control is used as a backup bin control and
safety device. See Fig. 2. For further details, see "IV.D. Bin Control Check."
The paddle-actuated mechanical bin control may be used as a stand-alone bin control
when the unit is placed on a standard Hoshizaki ice storage bin (S1 dip switch 7 in
the off position).
WARNING! Do not place S1 dip switch 7 in the off position on
dispenser unit applications.
Proximity
Switch
Actuator
Paddle
Ice Chute
E. Float Switch
A dual float switch is used to determine that there is sufficient water in the reservoir
during fill and refill. The control board monitors the upper float switch to de-energize
the inlet water valve when the upper float switch closes during fill and refill. The control
board monitors the lower float switch to energize the inlet water valve when the lower
float switch opens during the freeze cycle (refill). See Fig. 3. The control board monitors
the time between the lower float switch opening and the upper float switch closing
(90-second low water safety). The control board also monitors the time between the
upper float switch closing and the lower float switch opening (30-minute freeze timer).
No adjustment is required. For a float switch check procedure, see "IV.E.1. Float Switch
Check."
Red (R)
(upper float switch)
Black (BK)
(common)
Dark Blue (DBU)
(lower float switch)
Upper Float Switch
(blue)
Lower Float Switch
(white)
Plastic Retainer Clip
Spring Retainer Clip
Fig. 1
Fig. 2
Fig. 3
Infrared Sensor
Infrared Sensor
Housing
Infrared Sensor
Connector (20V DC
from K6 connector on
control board)
Infrared Sensor LED
Infrared Sensor LED
Infrared Sensor
Lens