59
7-2.
Operation Mode
and Control
Method
4) Cooling operation
Pressing the [
] button twice, starts a cooling operation.
1) Operation start condition
Pressing the [
] button twice, starts a cooling operation.
2) Op
eration mode selection
An operation mode is determined according to the
temperature of TWI sensor.
• 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.
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 DN
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.
The heat pump maintains a supply of hot water for up to
30 minutes during a simultaneous operation.
• 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.
Operation mode by zone
*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.
When TTW < 38°C (DN_20) 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 -25°C, the h-zone operation continues for
60 minutes.
Item Operation flow and applicable data, etc.
TWI
Higher of
TSC_F+2K or 12°C
TSC_F
Thermostat off operation
Heat pump operation
(Cooling)
e zone
d zone
TSC is a cooling temperature
set with the remote controller
DN Setting item Default Setting available range
02 Cooling mode availability 0 0: Permitted
18 Upper limit of cooling setting temperature 25 18 - 30°C
19 Lower limit of cooling setting temperature 7 7 - 20°C
Zone Hot water supply side Heating side
f Heat pump *2 Stop *2
g Heater Heat pump
h Heater *3 Heater *3
0
(DN_22)
-20
(-25)*
* ( ): 801, 1101
Diff: 5deg
f zone
h zone *3
Diff: 5deg
g zone
Heater operation
Hot water
supply heat
pump priority
operation
Heating heat
pump priority
operation
TO
Zone Hot water supply side Heating side
f' Heater Heat pump
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