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Item
8-2.
Operation Mode
and Control
Method
Operation flow and applicable data, etc.
4) Cooling operation
Pressing the [ZONE1, 2] button and then [OPERATION MODE] starts a cooling operation.
1) Operation start condition
Pressing the [ZONE1, 2] button and then [OPERATION
MODE] starts a cooling operation.
TWI
Heat pump operation
(cooling)
TSC_F
(Temperature set with
2) Operation mode selection
An operation mode is determined according to the
temperature of TWI sensor.
d zone
Diff : 2k
remote controller)
e zone
TSC_F
Thermostat off operation
• Heat pump operation selection *1
When TWI
TSC_F (d zone in the right figure) is met, the
heat pump operation is selected.
• Thermostat status "OFF"
When TWI < TSC_F (e zone in the right figure) is met, the
thermostat status "OFF" is selected.
TSC is a cooling temperature
set with the remote controller
3) Operation stop condition
When either of the following conditions is met, the cooling
operation stops.
• The remote controller gives a stop instruction.
• The operation is switched to heating.
*1: When the outside temperature is 10°C or below, cooling does
not start even if the TWI temperature falls into "d zone".
Related FC
FC No.
Setting item
Default
Setting available range
1: Not permit
0: Permitted
Upper limit of cooling setting temperature
25
20-30°C
Lower limit of cooling setting temperature
10
10-20°C
02
Cooling mode availability
18
19
5) Simultaneous operations of "hot water supply" and "heating"
At the time of "Hot water supply" and "Heating" simultaneous
operation, the operation mode is select as follows depending on
the outside air temperature.
• f zone Operation with hot water supply priority
A heat pump operation is performed in the hot water supply
side, and a heating operation in the heating side.
• g zone Operation with heating priority
A heat pump operation is performed in the heating side, and
a cylinder heater operation in the hot water supply side.
TO
Hot water
supply heat
pump priority
operation
0
(FC22) Heating heat
pump priority
operation
-20
Heater operation
f zone
Diff : 5deg
g zone
Diff : 5deg
h zone *3
Operation mode by zone
Zone
Hot water supply side
f
Heat pump *2
Heating side
Stop *2
g
Heater
Heat pump
h
Heater *3
Heater *3
*2: Note that after a heat pump operation for "Hot water supply" is selected in f zone, when the operation moves to a
heater operation for "hot water" and then 5 minutes has passed (Hot water supply operation in b zone), the operation
mode changes as follows.
Zone
Hot water supply side
Heating side
f'
Heater
Heat pump
When TTW
45°C (FC: changeable) is met, the operation ends f' zone and returns to f zone.
*3: If the h-zone operation starts while external temperature is higher than -20°C, the h-zone operation continues for 60
minutes.
50