Mitsubishi SRK25ZSP-W Service Manual page 8

(9) Outline of heating operation
(a) Operation of major functional components in heating mode
(a) Operation of major functional components in heating mode
Compressor
Compressor
Indoor fan motor
Indoor fan motor
Outdoor fan motor
(ii) Hot keep operation
Outdoor fan motor
During the heating operation, the indoor fan speed can be controlled based on the temperature of the indoor heat ex-
4-way valve
4-way valve
changer (Th2) to prevent blowing of cold air.
*It can be set the indoor fan motor off or the heating thermostat OFF with connecting a wired remote control.
In the case, indoor air temperature is detected by sensor on the wired remote control.
(b) Details of control at each operation mode (pattern)
1) Fuzzy operation
(b) Details of control at each operation mode (pattern)
(i) Fuzzy operation
Fan speed
Auto
Fan speed
Auto HI
HI MED
LO
MED
follows. LO
ULO
2) Hot keep operation
(ii) Hot keep operation
During the heating operation, the indoor fan speed can be controlled based on the temperature of the indoor heat
(c) Defrosting operation exchanger (Th2) to prevent blowing out of cold air.
Models SRK25, 35, 45ZSP-W
(i)
(c) Defrost operation
0
1)
(i)
1)
-5
2)
2) After finish of defrost operation
-10
3)
3)
-15
4)
-20
4)
− ≦
is as following.
(model DXK15 : ＋10
-25
-20
5)
5)
In case satisfied all of following conditions.
• Connect compressor speed 0 rps 10 times or more.
• Satisfy 1), 2) and 3) conditions above.
−
• Outdoor air temperature is 3°C or less.
(ii)
(ii)
1)
1)
2)
2) Continued operation time of defrost operation → For more than 16 minutes and 50 seconds (model SRK50 : 18 minutes).
Heating operation
Thermostat ON
Thermostat ON
ON
ON
ON
ON
ON
ON
ON
ON
Model
SRK20ZJ-S
Model
SRK20ZS-S
30~115rps
20~115rps 30~115rps
20~115rps 30~66rps
20~86rps 30~40rps
20~70rps
20~44rps
35 (model DXK12 : 45)
(model SRK50 : 35)
35 (model DXK12 : 45)
(model SRK50 : 35)
−
Defrost operation
−
start
C or less for 3 minutes continuously.
(model DXK15 : ≧ −2
≧
) higher
-15 -10 -5 0
＜ −
Outdoor air temperature (℃)
TH2
operation
Defrost operation
●
Max. 16 minutes and 50 seconds
(Mode SRK45: Max.17 minutes and 30 seconds)
Depends on an operation condition, the time can be longer than 7 minutes.
Heating
Heating
Thermostat OFF
Thermostat OFF
OFF
OFF
ON(HOT KEEP)*
ON(HOT KEEP)
OFF
(few minutes ON)
OFF
(few minutes ON)
ON
ON
SRK25ZJ-S SRK35ZJ-S
SRK25ZS-S SRK35ZS-S
30~115rps 30~115rps
20~115rps 30~115rps 20~115rps 30~115rps
20~115rps 30~72rps 20~115rps 30~76rps
20~104rps 30~42rps 20~108rps 30~46rps
20~84rps 20~96rps
20~54rps 20~60rps
Model DXK15Z6-S
0
-5
(Total compressor operation time)
-10
(Total compressor operation time)
-15
)
-20
＜ (model DXK15 : ≧ −2
-25
5 10 -20
−
1) 2) 3) 5)
(model SRK50 : 10 )
16 minutes and 50 seconds (model SRK45 : 17 minutes
6
- -
Failure
'18 • SRK-SM-259
Failure
OFF
OFF
OFF
OFF
OFF
OFF
OFF
(3 minutes ON)
OFF
(3 minutes ON)
SRK50ZJ-S
SRK50ZS-S
23~106rps
23~106rps 23~106rps
23~106rps 23~78rps
23~82rps 23~50rps
23~70rps
23~37rps
met.
are satisfied.)
Defrost operation
start
(model DXK15 : 10 )
)
-15 -10 -5 0
Outdoor air temperature (℃)
TH2
−
satisfied.
is satisfied.)
2-7 minutes
Hot keep operation
5 10