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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 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 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 connected 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.
Outdoor unit
MMY-MAP
Current value
(A)
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).
Pressure
Outdoor
(MPa)
unit
Operating
MMY-
mode
MAP
Pd
Ps
Cooling
2.9
0.9
0804
Heating
3.0
0.7
Cooling
3.0
0.8
1004
Heating
3.1
0.7
Cooling
3.1
0.8
1204
Heating
3.1
0.7
Cooling
3.0
0.8
1404
Heating
3.1
0.7
Cooling
3.1
0.8
1604
Heating
3.1
0.7
* 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
heating, respectively.
(2) Criteria for operating pressure
O
p
r e
t a
n i
g
m
o
d
e
Indoor temperature (°C)
Outdoor temperature (°C)
High pressure (MPa)
Pressure
Low pressure (MPa)
* Criteria after 15 minutes or more has passed since operating started
(3) On rotations of outdoor fans
Outdoor fans may rotate slowly to control pressure when cooling with low outer air temperature or heating with
excessive load. For control content, also refer to items in Section 5, "Control Outline: Outdoor Unit, Outdoor Fan
Control."
0804
1004
1204
23.5
25.5
28.5
Pipe surface temperature
(°C)
Indoor heat
Discharge
Suction (TS)
exchanger
(TD)
(TC)
85
15
10
85
5
35
85
15
8
85
4
35
85
17
8
90
2
35
85
15
10
85
4
35
90
15
10
90
2
35
C
o
o
n i l
g
H
e
t a
18~32
15~32
25~35
5~35
2.0~3.3
2.5~3.3
0.5~0.9
0.5~0.7
1404
1604
33.2
36.5
Number of compressor rotations
Outdoor heat
Liquid
Compressor
exchanger
temperature
1
(TE)
(TL)
40
40
50
3
30
50
40
40
65
2
30
65
40
40
70
2
30
75
40
40
60
3
30
60
40
40
65
2
30
65
n i
g
– 145 –
(rps)*
Indoor
fan
Compressor
Compressor
2
3
50
–
High
50
–
High
65
–
High
65
–
High
70
–
High
75
–
High
60
60
High
60
60
High
65
65
High
65
65
High
Air temperature
condition
(DB/WB) (°C)
Indoor
Outdoor
27/19
35/-
20/-
7/6
27/19
35/-
20/-
7/6
27/19
35/-
20/-
7/6
27/19
35/-
20/-
7/6
27/19
35/-
20/-
7/6
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