– 36 –
Note 1: Criteria for the difference between suction and discharge temperatures, between water
inlet and water outlet temperature
(1) Cooling operation
After operating for a minimum of 30 minutes in “COOL” mode, if the
Δ
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
Δ
T dry bulb temperature difference
between suction and discharge air of the indoor unit is 15°C or more, it is normal.
After operating for a minimum of 30 minutes in “HEAT” mode, if the
Δ
T water temperature difference
between water inlet and water outlet of the hot water module is 3 to 5 degrees, it is normal. (Hot water
module)
* 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 or the difference between the temperature
set by the remote controller and the water inlet temperature is small, then the
Δ
T temperature difference is
small.
* Consider that
Δ
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
0804
∗
1004
∗
1204
∗
1404
∗
1604
∗
Current value
(A)
23.5
25.5
28.5
33.2
36.5
* 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.
Outdoor
unit
MMY-
MAP
Operating
mode
Pressure
(MPa)
Pipe surface temperature
(˚C)
Number of compressor rotations
(rps)*
Indoor
fan
Air temperature
condition
(DB/WB) (˚C)
Pd
Ps
Discharge
(TD)
Suction (TS)
Indoor heat
exchanger
(TC)
Outdoor heat
exchanger
(TE)
Liquid
temperature
(TL)
Compressor
Compressor
Compressor
Indoor
Outdoor
1
1
1
08
Cooling
Heating
Cooling
Heating
Cooling
Heating
Cooling
Heating
Cooling
Heating
2.9
3.0
3.0
3.1
3.1
3.1
3.0
3.1
3.1
3.1
0.9
0.7
0.8
0.7
0.8
0.7
0.8
0.7
0.8
0.7
85
85
85
85
85
90
85
85
90
90
15
5
15
4
17
2
15
4
15
2
10
35
8
35
8
35
10
35
10
35
40
3
40
2
40
2
40
3
40
2
40
30
40
30
40
30
40
30
40
30
50
50
65
65
70
75
60
60
65
65
50
50
65
65
70
75
60
60
65
65
—
—
—
—
—
—
60
60
65
65
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/-
35/-
7/6
35/-
7/6
35/-
7/6
35/-
7/6
35/-
7/6
04
∗
1004
∗
1204
∗
1404
∗
1604
∗
* Criteria after 15 minutes or more has passed since operating started
Operating mode
Cooling
Heating
Indoor temperature (˚C)
18~32
15~32
Outdoor temperature (˚C)
25~35
5~35
Pressure
High pressure (MPa)
2.0~3.3
2.5~3.3
Low pressure (MPa)
0.5~0.9
0.5~0.7
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).
(2) Criteria for operating pressure
(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.”
