Mitsubishi SRR60ZJ-S, Service Manual

Page: 36 / 162

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35
-
'10 • SCM-SM-094
'09•SRK-DB-087D
1.8
ޓ
Protective control function
(1) Frost prevention control
(a) Operating conditions
(b) Detail of anti-frost operation
(c) Reset conditions:
Indoor heat exchanger
temperature (ºC)
2.5 8
(2) Cooling overload protective control
(a) Operating conditions:
(b) Detail of operation
(c) Reset conditions:
(3) Cooling high pressure control
(a) Purpose:
(b) Detector:
(c) Detail of operation:
53
58 60
Outdoor heat exchanger temperature (°C)
8rps (1)
8rps (1)
0rps
After lapse of 30 sec. or over (3)
After lapse of 30 sec. or over (3)
After lapse of 30 sec. or over (3)
lower limit
speed 30 rps
(Example) Fuzzy
Operation mode
Item
Protective control Reset
Compressor operation
Indoor fan
Item
SCM 40~80 ZJ-S
Outdoor air temperature
Lower limit speed
Model
Forced outage Operation instruction
Depends on operation mode
h
60 8 20
60
8
2.5
Reset
Protective
control
40 41 46 47
OFF
ON1
ON2
Outdoor air temperature ( )
C
º
'09•SRK-DB-087D
(6) Heating overload protective control
(a) Indoor unit side
1) Operating conditions :
2) Detail of operation :
(SRF, SRR:9th, FDTC:4th)
3) Reset conditions :
(b) Outdoor unit side
1) Operating conditions :
2) Detail of operation
3) Reset conditions:
(a) Operating conditions:
(b) Detail of operation:
(7) Heating low outdoor temperature protective control
(c) Reset conditions:
-8 -6 4 6
Lower limit 40 rps (model 50:45 rps)
Lower limit 35 rps
Normal operation
Outdoor air temperature(°C)
6
h
h
h
10 or 17 (model 60 ~ 80:13 )
A or C
B or D
B or D
B or D.
(model 60 ~ 80:11 ).
8 h
h 4
ާޓޓޓޓޓޓޓޓޓޓޓޓޓޓޓި
11(8) 13(10) 16 17
OFF
Upper C
Lower D
Upper A
Lower B
Outdoor air temperature( )
Item
Model
SCM40, 45
SCM50
SCM60, 71, 80
90
90
90
A
35
35
30
B
75
75
75
C
40
40
40
D
Unit: rps
Note(1) Value in ( ) are for the model SCM40, 45.
or 17
when the thermo becomes OFF, the speed is
º
(5) Heating high pressure control
(a) Indoor unit side
1) Start condition: When the indoor heat exchanger temperature (Th2) has become higher than the start temperature for
1 minute continuously.
2) Contents of control: Compressor stop
3) Release condition: When the indoor heat exchanger temperature (Th2) has become lower than the release tempera-
ture.
(b) Outdoor unit side
1) Start condition:
When the indoor heat exchanger temperature (Th2) has risen to a specified temperature while the
compressor is turned on.
2) Compressor command speed is controlled according to the zones of indoor heat exchanger tem-
perature as shown by the following table.
Item
Indoor
air temp.(Th1)
Release temperature Start temperature
Th1 <= 24°C 48.5°C 62°C
24°C < Th1<=27°C 47.5°C 61°C
27°C < Th1 46.5°C 60°C
Th2 < P1 P1 <= Th2 < P2 P2 <= Th2 < P3 P3 <= Th2
Protection control speed (NP) Normal Retention NP
−
4rps NP
−
8rps
Sampling time (s) Normal 20 20 20
Th2
NP
P1 P2 P3
10 <= NP < 115 45 52 57.5
115 <= NP < 120 45 ~ 43 52 ~ 50 57.5 ~ 55
120 <= NP
43 50 55
Unit: °C
• Model SCM40~50
Th2
NP
P1 P2 P3
10 <= NP < 90 45 52 57
90 <= NP < 100 45 ~ 44.5 52 ~ 49.5 57 ~ 54
100 <= NP < 110 44.5 ~ 44 49.5 ~ 47.5 54 ~ 51
110 <= NP < 120 44 ~ 43 47.5 ~ 45 51 ~ 48
120 <= NP
43
45
48
• Model SCM60~80
Unit: °C