Note 1: Criteria for the difference between suction and discharge temperatures
(1) Individual 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 46.4°F (8°C) or more, it is normal.
(2) Individual 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 59°F (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.
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
heating, respectively.
(2) Criteria for operating pressure
* 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.”
− 113 −
Outdoor unit MMY-MAP 0726FT*
Current value (A) 47.0
Model
MMY-MAP
Indoor Outdoor
All cooling 410 130 183 82 59 48 105 102 50 50 High 80/67 95/-
All heating 428 102 184 39 40 100 38 90 50 50 High 70/- 47/43
Air temperature
condition
(DB/WB) (°F)
Indoor
fan
Operation
mode
Liquid
temperature
(TL)
Suction 1
(TS1)
Suction 2
(TS2)
Indoor heat
exchanger
(TC)
Outdoor
heat
exchanger
(TE)
Number of compressor rotation
Pressure (psi) Pipe surface temperature (°F)
0726FT*-UL
Pd Ps
Discharge
(TD)
Compressor 1 Compressor 2
All cooling All heating
64~90 59~77
77~95 41~50
High pressure (psi) 290~465 365~475
Low pressure (psi) 75~135 70~110
Pressure
Operating mode
Indoor temperature (°F)
Outdoor temperature (°F)
To Next Page
Loading...
