Outline Of Cooling Operation; Outline Of Dehumidifying (Dry) Opertaion - Mitsubishi Heavy Industries SRK60ZSX-S Technical Manual

(ii) Contents of control
Before setting
After setting
(iii) Reset condition
Push ON/OFF button 30 seconds or more during setting this mode. At completion of the reset, the indoor
(d) Countermeasure for excessive temperature rise
unit emits a buzzer sound "Pip Pip Pip".
If it feels excessive temperature rise in heating operation, setting temperature can be lower.

(18) Outline of cooling operation

(a) Operation of major functional components in cooling mode
Compressor
Indoor fan
Outdoor fan
4-way valve
(b) Detail of control in each mode (Pattern)
(i) Fuzzy operation
Fan speed
Auto
HI
MED
LO
ULO
ECO
(20) Outline of automatic operation
(19) Outline of dehumidifying (DRY) operation
(a) Determination of operation mode
(a) Purpose of DRY mode
The purpose is "Dehumidification", and not to control the humidity to the target condition.
Indoor/outdoor unit control the operation condition to reduce the humidity, and also prevent over cooling.
(b) Outline of control
(i) Indoor unit fan speed and compressor are controlled by the area which is selected by the temperature difference.
Indoor air temperature (˚C)
Indoor
fan speed
(b)
Compressor
(i)
speed
(ii) When both the indoor and the outdoor air temperatures are in the range "A", cooling or heating is switched depending on
the difference between the setting temperature and the indoor air temperature.
When the operation mode has been judged following the change of setting temperature with the remote control, the hourly j-
(iii)
(ii) The indoor unit check the current area by every 5 minutes, and operate by the next checking.
udgment of operation mode is cancelled.
(c) Other
(c)
When the outdoor air temperature and room temperature is low in cooling operation, indoor unit can not operate in cooling,
and dehumidify. In this case, the units operate in heating to rise the indoor air temperature and after that start DRY operation.
(d)
Setting
18 19 20
20 21 22
18 19 20
Thermostat ON
ON
ON
ON
OFF
Model
SRK20ZSX-S
12-50rps
12-50rps
12-34rps
12-30rps
12-30rps
12-34rps
27.5
25.5
Indoor unit fan speed
18.0
D C
Stop
Minimum
Stop
Difference between set temperature and indoor air temperature.
–6 –5
Cooling
Signal of wireless remote control (Display)
21 22 23 24
23 24 25 26
21 22 23 24
Cooling
Thermostat OFF
OFF
ON
OFF
(few minutes ON)
OFF
SRK25ZSX-S SRK35ZSX-S
12-58rps 12-74rps
12-58rps 12-74rps
12-38rps 12-54rps
12-34rps 12-42rps
12-30rps 12-30rps
12-38rps 12-54rps
A Dehumidifying
Area
B A
Lo speed
Heating
ULo speed 18
Outdoor air temperature (˚C)
Limited （Lower than
normal cooling operation）
Limited
（Lower than the speed in"Area A"）
Setting temperature
43
- -
Signals of wireless remote control (Display)
–4 –3 –2 –1
25 26 27 28
'17 • SRK-T-203
27 28 29 30
25 26 27 28
'09•SRK-DB-087D
Failure
OFF
OFF
OFF
(few minutes ON)
OFF
SRK50ZSX-S
12-86rps
12-86rps
12-70rps
12-50rps
12-30rps
12-70rps
Cooling
30
±0
+1 +2 +3
Unit : °C
29 30
31 32
29 30
SRK60ZSX-S
12-110rps
12-110rps
12-90rps
12-66rps
12-30rps
12-90rps
+4 +5 +6