Outline Of Automatic Operation; Protective Control Function - Mitsubishi Heavy Industries SRK60ZSX-S Technical Manual

HI
MED
LO
ULO
ECO

(20) Outline of automatic operation

(a) Determination of operation mode
(a) Determination of operation mode
Operation mode is determined by indoor air temperature and outdoor air temperature as following.
Indoor air
temperature (˚C)
Indoor air temperature (˚C)
(b) Operation mode is changes when keep cooling and heating thermostat off 20 minutes and be satisfied following conditions.
If the setting temperature is changed with the remote control, the operation mode is judged immediately.
(b)
(i)
※It can not be changed to heating mode if outdoor air temperature is 28℃ or higher.
(ii) When both the indoor and the outdoor air temperatures are in the range "A", cooling or heating is switched depending on
(c) When the unit is started again within one hour after the stop of automatic operation or when the automatic operation is
the difference between the setting temperature and the indoor air temperature.
selected during heating, cooling or dehumidifying operation, the unit is operated in the previous operation mode.
When the operation mode has been judged following the change of setting temperature with the remote control, the hourly j-
(iii)
(d) Setting temperature can be adjusted within the following range. There is the relationship as shown below between the signals
udgment of operation mode is cancelled.
of the wireless remote control and the setting temperature.
(c)
Cooling
(d)
Setting
temperature
Heating

(21) Protective control function

(a) Dew prevention control [Cooling]
Cooling
Setting
Dehumidifying
Prevents dewing on the indoor unit.
temperature
Heating
(i) Operating conditions
When the following conditions have been satisfied for more than 30 minutes after starting operation
1) Compressor's speed is 22 rps or higher.
2) Detected value of humidity is 68% or higher.
(ii) Contents of operation
1) Air capacity control
Item
ULO
LO
AUTO,HI,MED
Note (1) Ranges A and B are as shown below.
Range A
12-50rps
12-34rps
12-30rps
12-30rps
12-34rps
SP
Heating
27.5
25.5
Outdoor air temperature (˚C)
18.0
Keep operation
mode
Heating
SP － 1
Indoor air temperature－Setting temperature (˚C)
18 19 20
18 19 20
18 19 20
–6 –5
Model
Upper limit of compressor's speed RangeA: 40rps, RangeB: 24rps RangeA: 45rps, RangeB: 24rps RangeA: 50rps, RangeB: 24rps
Indoor fan
Upper limit of compressor's speed RangeA: 40rps, RangeB: 24rps RangeA: 45rps, RangeB: 24rps RangeA: 50rps, RangeB: 24rps
Indoor fan
Upper limit of compressor's speed RangeA: 40rps, RangeB: 30rps RangeA: 45rps, RangeB: 30rps RangeA: 50rps, RangeB: 30rps
Indoor fan
Range B
68 73
Humidity(%)
12-58rps 12-74rps
12-38rps 12-54rps
12-34rps 12-42rps
12-30rps 12-30rps
12-38rps 12-54rps
Cooling
SP: Setting temperature
28
A Dehumidifying
Heating
Cooling
18
Outdoor air temperature (˚C)
SP: Setting temperature
SP ＋ 1
Signals of wireless remote control (Display)
24
21 22 23
24
21 22 23
24
21 22 23
Signals of wireless remote control (Display)
–4 –3 –2 –1
SRK20, 25ZSX-S
Adaptable to compressor speed
Adaptable to compressor speed
44
- -
12-86rps
12-70rps
12-50rps
'17 • SRK-T-203
12-30rps
12-70rps
Cooling
30
25 26 27 28
25 26 27 28
25 26 27 28
±0
+1 +2 +3
SRK35ZSX-S SRK50, 60ZSX-S
4th speed
12-110rps
12-90rps
12-66rps
12-30rps
12-90rps
Unit : ℃
29 30
29 30
29 30
+4 +5 +6