Mitsubishi Heavy Industries SRK60ZJX-S, Technical Manual

Page: 123 / 272

-
122
-
'10 • SR-T-091
'09•SRK-DB-087D
(f) Heating overload protective control
1) Indoor unit side
a) Operating conditions :
b) Detail of operation :
c) Reset conditions :
2) Outdoor unit side
a) Operating conditions :
b) Detail of operation
c) Reset conditions:
1) Operating conditions:
2) Detail of operation:
(g) Heating low outdoor temperature protective control
3) Reset conditions:
-10 -8 -2 2
Lower limit 45 rps
Lower limit 40 rps
Normal operation
Outdoor air temperature(°C)
10 11 19 20
Normal operation
Protective control ON1
Protective control ON2
Outdoor air temperature(°C)
21 22
Normal operation
Protective
control
Outdoor air temperature(°C)
• Model 50
• Model 50
• Models 20 ~ 35
• Models 20 ~ 35
1)
ޓ
Operating conditions:
When the outdoor air temperature (TH2) is lower than 4ºC or higher continues for 30 seconds
while the compressor command speed is other than 0 rps.
2)
ޓ
Detail of operation: The lower limit compressor command speed is change as shown in the figure belo.
Lower limit 29 rps
Normal operation
4 6
Outdoor air temperature(°C)
Model 50
A B C D
RPSmin < 40
40 <= RPSmin < 80
80 <= RPSmin < 90
90 <= RPSmin < 102
102 <= RPSmin
49
53
41
53 ~ 47
47 ~ 41
53
57
45
57 ~ 51
51 ~ 45
55
59
47
59 ~ 53
53 ~ 47
58
62
51
58
51
When the outdoor air temperature (TH2) is 22ºC or higher continues for 30 seconds while
the compressor command speed other than 0 rps.
i)
ii)
iii)
iv)
Taking the upper limit of compressor command speed range at 60 rps, if the output speed obtained with the fuzzy
calculation exceeds the upper limit, the upper limit value is maintained.
The lower limit of compressor command speed is set to 40 rps and even if the calculated result becomes lower than
that after fuzzy calculation, the speed is kept to 40 rps. However, when the
thermo becomes OFF, the speed is
reduced to 0 prs.
rps.
a) Operating conditions :
b) Detail of operation
When the outdoor air temperature (TH2) is 11ºC or higher continues for 30 seconds while
the compressor command speed other than 0 rps.
i)
ii)
iii)
iv)
Taking the upper limit of compressor command speed range at 78 rps, if the output speed obtained with the fuzzy
calculation exceeds the upper limit, the upper limit value is maintained.
The lower limit of compressor command speed is set to 30 rps and even if the calculated result becomes lower than
that after fuzzy calculation, the speed is kept to 30 rps. However, when the
thermo becomes OFF, the speed is
reduced to 0 prs.
rps.
.
c) Reset conditions:
.
a)
b)
30
Protective
control
NO1
NO2
Item
Compressor command speed
Low limit
30 rps
30 rps
Upper limit
78 rps
51 rps
It depends on compressor command speed
Outdoor fan speed
2nd
10
'09•SRK-DB-087D
(h) Compressor overheat protection
1) Purpose:
2) Detail of operation
a)
Discharge pipe temperature (˚C)
(Example) Fuzzy
90 100 110
b)
(i) Current safe
1) Purpose:
2) Detail of operation:
(j) Current cut
1) Purpose:
2) Detail of operation:
(k) Outdoor unit failure
(l) Indoor fan motor protection
Cooling Heating
Lower limit speed
Item
Model
3)
ޓ
Reset conditions:
When either of the following condition is satisfied.
a)
ޓ
The outdoor air temperature (TH2) becomes 6ºC.
b)
ޓ
The compressor command speed is 0 rps.
20 ~ 35 20 rps
24 rps
30 rps
29 rps 50
item 1), 2) is satisfied. Once the unit is stopped by this function, ti is not
1)
2)
'09•SRK-DB-087D
(m) Serial signal transmission error protection
1) Purpose:
2) Detail of operation:
(n) Rotor lock
(o) Outdoor fan motor protection
(p) Outdoor fan control at low outdoor temperature
Cooling
1) Operating conditions:
(q) Refrigeration cycle system protection
1) Starting conditions
2) Detail of operation:
3) Reset conditions:
Heating
1) Operating conditions:
2) Detail of operation:
3) Reset conditions:
Outdoor temperature > 10˚C
Outdoor temperature <= 10˚C
Outdoor fan
a)
b)
a)
b)
a)
b)
a)
b)
c)
(model 50 : 0ºC)
(model 50 : 2ºC)
When 5 minutes have elapsed after the compressor ON or the completion of the defrost control
Other than the defrost control
2) Contents of control
a)
3) Resetting condition
When the compressor has been turned OFF
b)
When the conditions of 1) above are met, the compressor stops.
Error stop occurs when the compressor has stopped 3 times within 60 minutes.
c) When, after meeting the conditions of a) and b) above, the compressor speed, indoor air temperature (Th1) and indoor
heat exchanger temperature (Th2) have met the conditions in the following table for 5 minutes:
Compressor speed (N) Operation mode
Cooling
Heating
Indoor air temperature (Th1)
Th1−4<Th2
Indoor air temperature (Th1)/
Indoor heat exchanger temperature (Th2)
Th2<Th1+6
50 N <
=
10 Th1 40 <
=
<
=
0 Th1 40 <
=
<
=
50 N <
=