-
14
-
(c) Hot keep operation
If the hot keep operation is selected during the heating operation, the indoor blower is controlled based on the temperature of
the indoor unit heat exchanger (detected with Th2, indoor unit heat exchanger thermistor) to prevent blowing of cool wind.
Note (1) Refer to the table shown above right for the values A and B.
¡ Normal mode (Normal heating operation, operation after HI POWER completion)
Indoor heat exchanger temp. (˚C)
¡ Values of A, B
AB
At 0 rps command 22 25
Other than 0 rps
17 19
command
AB
25·35ZD: 23°C
50ZD: 20°C
28 29.5 31.5 34 36 37.5 39 40
1st speed
3rd speed
4th speed
5th speed
6th speed
7th speed
OFF
Indoor fan
(3) Details of control at each operation mode (pattern)
(a) Fuzzy operation
Deviation between the room temperature setting correction temperature and the suction air temperature is calculated in
accordance with the fuzzy rule, and used for control of the air capacity and the inverter speed.
(b) Heating thermostat operation
¡ Operating conditions
If the speed obtained with the fuzzy calculation drops below -24 rps during the heating fuzzy operation, the operation
changes to the heating thermostat operation.
¡ Detail of operation
4.6 Outline of heating operation
(1) Operation of major functional components in heating mode
(2) Air flow selection
(a) Speed of inverter changes within the range of selected air flow.
(b) When the defrosting, protection device, etc. is actuated, operation is performed in the corresponding mode.
(c) Outdoor unit blower operates in accordance with the inverter command speed.
Model
SRK25ZD-S, 35ZD-S SRK50ZD -S
Item
Inverter speed 0rps [Comp. stopped] 10 rps [10sec.] → 0rps [Comp. stopped]
Indoor fan Hot keep normal mode → 1st speed
Outdoor fan Stop 2nd speed [1min.] → stop
Flap Horizontal
Model
SRK25ZD-S SRK35ZD-S SRK50ZD-S
Air flow selection
Inverter command speed 30~102rps 15~120rps
Air flow Depends on inverter command speed.
Inverter command speed 30~102rps 15~120rps
Air flow 8th speed fixed 6th/7th speed
Inverter command speed 30~72rps 30~76rps 15~62rps
Air flow 6th speed fixed 4th/5th speed
Inverter command speed 30~42rps 30~46rps 15~38rps
Air flow 4th speed fixed 3rd speed fixed
Auto
HI
MED
LO
Item
Indoor fan motor ON ON OFF
Flaps ON or OFF ON or OFF Stop position control
Display Lights up Lights up Lights up or flashes
52C ON ON OFF after stop mode
Outdoor fan motor
OFF (25, 35 type)
ON
OFF (25, 35 type)
Depending on the stop mode (50 type) Depending on the stop mode (50 type)
4-way valve
Depending on the stop mode
ON
Depending on the stop mode
Electronic expansion valve Depending on the EEV control
When the inverter
speed is 0rps
When the inverter speed
is other than 0rps
When the inverter speed is 0rps
due to an anomalous stop
Functional
components
(25, 35ZD only)
8th speed
(25, 35ZD only)
9th speed
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