'20 • SRF-SM-311
-
11
-
(c) Cooling overload protective control
(i) Operating conditions
When the outdoor air temperature (TH2) has become continuously for 30 seconds at 41ºC or more, or 47ºC or more with
the compressor running, the lower limit speed of compressor is brought up.
(ii) Detail of operation
1) The outdoor fan is stepped up by 3 speed step. (Upper limit 8th speed.)
2)
The lower limit of compressor command speed is set to 30 or 45 rps (SRF50 : 40 rps) and even if the calculated result becomes
lower than that after fuzzy calculation, the speed is kept to 30 or 45 rps (SRF50 : 40 rps). However, when the thermo OFF, the
speed is reduced to 0 rps.
(iii) Reset conditions
When either of the following condition is satised
1) The outdoor air temperature is lower than 40ºC.
2) The compressor command speed is 0 rps.
Model
Item
SRF25, 35, 50
Outdoor air temperature
41°C or more 47°C or more
Lower limit speed
30 rps 45 rps (SRF50 : 40 rps)
Outdoor air temperature (ºC)
10
1((
40 41 46 47
(b) Frost prevention control
(During cooling or dehumidifying)
(17) Frost prevention control
Operating conditions
Detail of anti-frost operation
(ii)
(iii) Reset condition
Indoor heat exchanger
temperature (ºC)
2.
Operation mode
Item
Protective control Reset
Compressor operation
Indoor fan
Forced outage Operation instruction
Depends on operation mode
8
2.51)
2)
Reset
Protective
control
(d) Cooling high pressure control
(i) Purpose
Prevents anomalous high pressure operation during cooling
(ii) Detector
Outdoor heat exchanger temperature (TH1)
(iii) Detail of operation
TH1(ºC)
P1 P2 P3
25
Range B 53 58 63
Range A 47 50 53
35
Range B 53 58 63
Range A 48 53 55
50
Range B 53 58 63
Range A 51 53 56
Range C 47 49 51
Outdoor air tamperature(
℃
)
Range C
25 26 31 32
Range A
Range B
To Next Page
General
