Toshiba SMMS-e - Component Temperature Criteria

48
Service Support
Function
Note 1: Criteria for the difference between suction and discharge temperatures
(1) Cooling operation
After operating for a minimum of 30 minutes in “COOL” mode, if the T dry bulb temperature difference between
suction and discharge air of the indoor unit is 8°C deg or more, it is normal.
(2) Heating operation
After operating for a minimum of 30 minutes in “HEAT” mode, if the T dry bulb temperature difference between
suction and discharge air of the indoor unit is 15°C deg or more, it is normal.
* If demand from the indoor unit on the outdoor unit is low because the difference between the temperature set
by the remote controller and the temperature of the room is small, then the T temperature difference is small.
* Consider that T temperature difference may diminish in cases of a system in which the co
nnected indoor unit
capacity exceeds the outdoor unit capacity, the pipe length is long, or a large difference exists among outdoor
units.
Note 2: Criteria for operating power current
The table below shows the maximum current for each outdoor unit. Under standard conditions, operating current is
about 80% of the value shown in the table below.
Note 3: Criteria for cycle status
(1) These data are based on operating a 4-way Air Discharge Cassette type air conditioner of 100% connection
with standard piping length.
Data may vary depending on temperature conditions, installed pipe length, and room shape combinations, or
indoor unit connection capacity.
For pressure criteria in different temperature conditions, refer to (2).
* This compressor is driven with a 4-pole motor. The value of the compressor frequency (rps) measured with a clamp meter at the
compressor lead line is two times the rotation count (rps) of the compressor.
* Each compressor may have a different frequency as a measure against resonance.
* The temperature of the indoor heat exchanger (TC) indicates TCJ sensor temperature when cooling, and TC2 sensor temperature when
heat
ing, respectively
(2) Criteria for operating pressure
* Criteria after 15 minutes or more
has passed since operating started
Indoor temperature (°C)
Outdoor temperature (°C)
Operating mode Cooling Heating
15~25
5~10
2.5~3.3
0.5~0.7
18~32
25~35
2.0~3.7
0.5~0.9
Pressure
High pressure (MPa)
Low pressure (MPa)
Pd
Ps
Cooling
Heating
Cooling
Heating
Cooling
Heating
Cooling
Heating
Cooling
Heating
Cooling
Heating
Cooling
Heating
Cooling
Heating
Cooling
Heating
Cooling
Heating
Cooling
Heating
2.9
2.6
3.1
2.6
3.2
2.6
3.1
2.6
3.2
2.6
3.2
2.8
3.1
2.6
3.1
2.6
3.1
2.8
3.2
2.7
3.1
2.8
0.9
0.7
0.9
0.7
0.9
0.7
0.9
0.7
0.9
0.7
0.9
0.7
0.9
0.7
0.9
0.7
0.9
0.6
0.9
0.6
0.9
0.7
80
75
85
80
90
85
85
80
90
80
90
85
75
65
80
70
85
75
95
75
80
70
16
5
16
4
16
3
16
5
16
4
16
3
16
4
16
4
15
3
14
3
15
4
10
35
11
35
11
35
10
35
10
35
10
30
11
30
11
30
11
30
11
30
11
30
40
3
40
2
40
2
40
3
40
3
40
2
40
3
40
3
40
2
40
2
40
3
30
30
30
30
30
25
30
30
35
30
35
25
35
30
35
25
35
25
35
20
35
25
50
50
60
65
70
75
50
55
60
65
70
70
60
65
70
75
80
85
100
85
70
75
50
50
60
65
70
75
50
55
60
65
70
70
60
65
70
75
80
85
100
85
70
7
5
High
High
High
High
High
High
High
High
High
High
High
High
High
High
High
High
High
High
High
High
High
High
27/19
20/-
27/19
20/-
27/19
20/-
27/19
20/-
27/19
20/-
27/19
20/-
27/19
20/-
27/19
20/-
27/19
20/-
27/19
20/-
27/19
20/-
35/-
7/6
35/-
7/6
35/-
7/6
35/-
7/6
35/-
7/
6
35/-
7/6
35/-
7/6
35/-
7/6
35/-
7/6
35/-
7/6
35/-
7/6
Outdoor
unit
MMY-
MAP
Operating
mode
Pressure
(MPa)
Indoor
fan
Indoor
Outdoor
Compressor
1
Compress
or
2
Pipe surface temperature
(°C)
Air temperature
condition
(DB/WB) (°C)
Number of compressor
rotations
(rps)
Discharge
(TD)
Suction
(TS)
Outdoor
heat
exchanger
(TE)
Liquid
temperature
(TL3)
Indoor heat
exchanger
(TC)
0806*
1006*
1206*
1406*
1606*
14A6*
16A6*
1806*
2006*
2206*
10A6*
2206* : Heat Recovery type Not use
Outdoor unit MMY-MAP 0806* 1006*
1206*
14B6*
1406*
1606* 18B6* 1806* 2006* 2206*
Current value (A)
20.5 21.5 26.1 29.4
31.0
35.8 39.9 40.6 44.9 49.3