Toshiba HWT-602S21SM3W-E(TR) Service Manual page 74

Item
7-2. 4) Cooling operation
Operation Mode
Pressing the [
and Control
1) Operation start condition
Method
Pressing the [
2) Operation 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
DN
02
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.
The heat pump maintains a supply of hot water for up to
30 minutes during a simultaneous operation.
If TTW does not reach the TSC_H during 30 minutes,
the operation repeat the heating 20 minutes/
Hot water supply 30 minutes cycle unil TTW reach
the TSC_H.
Operation mode by zone
Zone
f
h
*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
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.
Operation flow and applicable data, etc.
] button twice, starts a cooling operation.
] button twice, starts a cooling operation.
Setting item
Cooling mode availability
Upper limit of cooling setting temperature
Lower limit of cooling setting temperature
Hot water supply side
Heat pump *2
Heater *3
Hot water supply side
f' Heater
Higher of
TSC_F+2K or 12°C
C
Default
0
25
7
-20
(-25)*
* ( ): 801, 1101, 1401
Heating side
Stop *2
Heater *3
Heating side
Heat pump
73
TWI
Heat pump operation
(Cooling)
d zone
TSC_F
e zone
Thermostat off operation
TSC is a cooling temperature
set with the remote controller
Setting available range
0: Permitted
18 - 30°C
7 - 20°C
TO
Hot water
supply heat
pump priority
operation
Heater operation
f zone
Diff: 5deg
h zone *3