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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
MCY-MHP
0305
Current value
(A)
21.2
Note 3: Criteria for cycle status
(1) These data are based on operating a 4-way
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
MCY-
mode
Discharge
MHP
Pd
Ps
(TD)
Cooling
2.7
1.0
74
0305
Heating
2.4
0.7
69
Cooling
3.1
0.9
85
0405
Heating
2.5
0.7
73
Cooling
3.3
1.0
88
0505
Heating
2.4
0.7
66
* 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.
* 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."
0405
0505
21.2
21.2
Cassette type air conditioner of 100 % connection with standard
Pipe surface temperature
(°C)
Indoor heat
Outdoor heat
Suction (TS)
exchanger
exchanger
temperature
(TC)
(TE)
17
13
43
5
33
2
16
13
43
3
34
1
15
14
43
0
31
1
C
o
o
n i l
g
H
e
t a
n i
g
18~32
15~25
25~35
5~10
2.0~3.3
2.5~3.3
0.5~0.9
0.5~0.7
68
91
Air temperature
Compressor
condition
drive
(DB / WB) (°C)
Indoor
revolution
fan
Liquid
frequency
Indoor
Outdoor
(rps)*
(TL)
38
50
High
27/19
27
57
High
20/-
37
73
High
27/19
29
79
High
20/-
40
83
High
27/19
30
93
High
20/-
35/-
7/6
35/-
7/6
35/-
7/6
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