-
86
-
'17 • SRK-T-206
(ii) Contents of operation
1) Air capacity control
Note (1) Ranges A and B are as shown below.
Model
Item
SRK63ZSPR-S
SRK71ZSPR-S
SRK80ZSPR-S
Upper limit of compressor’s command speed
(1)
Range A: As per following table, Range B: 40 rps
Range A
63
68
78
Range B
Cancel
Humidity (%)
●
Condition for range A
Compressor’s command speed is controlled according to the indoor
unit heat exchanger temperature (Th2) and the indoor unit room
temperature (Th1).
Condition
Compressor’s command speed
Th2
≦
Th1
‒
10
・
Decreases the compressor’s target max speed
by 4 rps.
・
If the condition is met still 20 seconds later,
the speed is decreased further by 4 rps. This
process is repeated further so far as the
condition is met. (Lower limit is 30 rps.)
Th1
‒
10
＜
Th2
≦
Th1
‒
6 Compressor’s target max. speed or changed
value of the same is maintained.
Th2
‒
6
＜
Th1
Changed compressor’s target max. speed is
increased at a rate of 1 rps/20 seconds.
2) When this control has continued for more than 30 minutes continuously, the following wind direction control is per-
formed.
a) When the vertical wind direction is set at other than the vertical swing, the flaps change to the horizontal position.
b) When the horizontal wind direction is set at other than the horizontal swing, the louver changes to the vertical po-
sition.
'09•SRK-DB-087D
(b) Frost prevention control
(i) Operating conditions
(ii) Detail of anti-frost operation
(iii) Reset conditions:
Indoor heat exchanger
temperature (ºC)
2.5
5
8
0 rps
Lower
limit
speed
Compressor
command
speed
(c) Cooling overload protective control
(i) Operating conditions:
(ii) Detail of operation
(iii) Reset conditions:
(d) Cooling high pressure control
(i) Purpose:
(ii) Detector:
(iii) Detail of operation:
53
58
60
Outdoor heat exchanger temperature (°C)
8rps
(1)
8rps
(1)
0rps
After lapse of 30 sec. or over
(3)
After lapse of 30 sec. or over
(3)
After lapse of 30 sec. or over
(3)
lower limit
speed 30 rps
(Example) Fuzzy
Indoor heat exchanger
temperature
Item
5°C or lower
2.5°C or lower
Lower limit of compressor command speed
Indoor fan
Outdoor fan
4-way valve
Item
SRK63, 71, 80ZM-S
Outdoor air temperature
Lower limit speed
Model
1)
2)
1)
2)
1)
2)
more, with the compressor running, the lower limit
The lower limit of compressor command speed is set to 30 or 40 rps and even if the calculated result becomes lower than
that after fuzzy calculation, the speed is kept to 30 or 40 rps. However, when the thermo OFF, the speed is reduced
to 0 rps.
60
60
20
8
40
41
46
47
ON1
OFF
ON2
Outdoor air temperature (°C)
22 rps (model SRK63 : 25rps)
5–8ºC
2.5–5ºC
(iii) Reset condition:
When any of followings is satisfied.
1) Compressor’s command speed is less than 28 rps.
2) Detected value of humidity is less than 63%.
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