Mitsubishi SRK63ZM-S Technical Manual page 53

(iii) Resetting condition: When any of followings is met
1) Compressor's command speed is less than 28 rps.
2) Detected value of humidity is less than 63%.
(b) Frost prevention control
(i) Operating conditions
1)
2)
(ii) Detail of anti-frost operation
Indoor heat exchanger
Item
Lower limit of compressor command speed
Indoor fan
Outdoor fan
4-way valve
(iii) Reset conditions:
1)
2)
(c) Cooling overload protective control
(i) Operating conditions:
Item
Outdoor air temperature
Lower limit speed
(ii) Detail of operation
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.
(iii) Reset conditions:
1)
2)
(d) Cooling high pressure control
(i) Purpose:
(ii) Detector:
(iii) Detail of operation:
(Example) Fuzzy
temperature 5°C or lower
more, with the compressor running, the lower limit
Model
SRK63, 71, 80ZM-S
After lapse of 30 sec. or over
After lapse of 30 sec. or over
After lapse of 30 sec. or over
53
Outdoor heat exchanger temperature (°C)
60
2.5°C or lower
(3) 8rps (1)
8rps (1)
(3)
lower limit
(3)
speed 30 rps
58
60
52
- -
'13 • SRK-T-142
'09•SRK-DB-087D
compressor
command
speed
Lower
limit
speed
0 rps
2.5 5
Indoor heat exchanger
temperature (ºC)
ON1
OFF
40 41 46
Outdoor air temperature (°C )
0rps
60
8 20
8
ON2
47