Protective Control Function - Mitsubishi Heavy Industries SRF25ZS-W Service Manual
Inverter floor standing type residential air-conditioners
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Also See for SRF25ZS-W:
- User manual (38 pages) ,
- User manual (37 pages) ,
- Technical manual (311 pages)
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※It can not be changed to heating mode if outdoor air temperature is 28℃ or higher.
(c) When the unit is started again within one hour after the stop of automatic operation or when the automatic operation is
selected during heating, cooling or dehumidifying operation, the unit is operated in the previous operation mode.
(d) Setting temperature can be adjusted within the following range. There is the relationship as shown below between the signals
of the wireless remote control and the setting temperature.
Cooling
Setting
temperature
Heating
(e) When the unit is operated automatically with the wired remote control, the cooling operation is controlled according to
the display temperatures while the setting temperature is compensated by ＋2℃ during heating.
(17) Protective control function
(a) Dew prevention control [Cooling]:Prevents dewing on the indoor unit.
(i) Operating conditions
When the following conditions have been satisfied for more than 30 minutes after starting operation
1) Compressor's command speed is 32 (SRF50 : 28) rps or higher.
2) Detected value of humidity is 68% or higher.
(ii) Contents of operation
1) Air capacity control
Item
LO, ULO
AUTO,HI,MED
Note (1) Ranges A and B are as shown below.
2) When this control has continued for more than 30 minutes continuously,the following wind direction control is per-
formed.
・ Upper flap : Approx 38 °
・ Lower flap and Damper : Close
(iii) Reset conditions
When any of followings is satisfied
1) Compressor's command speed is less than 32 (SRF50 : 28) rps.
2) Detected value of humidity is less than 63%.
SP − 1
Indoor air temperature−Setting temperature (˚C)
18
19
20
18
19
20
20
21
22
Upper limit of compressor's command speed
Indoor fan
Upper limit of compressor's command speed
Indoor fan
Range A
SP ＋ 1
Signals of wireless remote control (Display)
24
21
22
23
24
21
22
23
23
24
25
26
Model
RangeA: 60rps, RangeB: 40 (SRF35 : 45) rps RangeA: 50rps, RangeB: 30rps
RangeA: 60rps, RangeB: 40 (SRF35 : 45) rps RangeA: 50rps, RangeB: 30rps
Adaptable to compressor's command speed (Lower limit 5th speed)
Range B
68
73
Humidity(%)
10
-
-
'20 • SRF-SM-311
25
26
27
28
25
26
27
28
27
28
29
30
SRF25, 35
5th speed
Unit : ℃
29
30
29
30
31
32
SRF50
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