5-2-2 Major functions
Description of the input/output functions of the control unit
Classification
Item Type Function
INPUT
Cold/Hot water
selection switch
TACT
S/W Switch to select cold/Hot water
Extracton switch
Electrostatic
capacity switch
Extraction switch for the selected cold/
hot/room temperature water.
Hot water lock switch
TACT
S/W
Sets the hot water extraction lock
function.
Hot water
temperature sensor
Thermistor
Temperature sensor of the hot water
tank.
Cold water
temperature sensor
Thermistor
Temperature sensor of the cold water
tank.
Water level sensor
REED LEVEL
sensor
Detects low/high water level and water
overflow.
Light sensor CDS Senses illumination.
OUTPUT
FND indication part
Hot water LED
Displays temperatures in 4 steps:
below 75°C
/75°C/83°C/91°C.
Cold water
temperature LED
Displays temperatures in 4 steps:
5°C/7.3°C/10°C/13°C.
Status LED
Cold/Hot/Room
temperature water
selection LED
Displays the selected cold/hot/room
temperature water
.
The concerned LED flashes during the
water extraction.
Extraction LED
Indicates that the extraction switch is
selected.
Hot water lock LED
Indicates that the hot water lock switch
is selected.
W
ater heater Heater Heats water.
Cold water
compressor
Compressor
Cools water.
Cooling F
AN BOX FAN
A ventilation fan to improve the cooling
function.
Operation alarm bell Bell
The bell rings to indicate the operation
status.
Extraction valve 3-W
A
Y V/V
The extraction valve used when to
extract the selected cold/hot/room
temperature water.
Feed water valve FEED V/V A feed water inlet valve.
NOS valve NOS V/V A safety shut-of
f valve.
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