Toshiba MM-A0280HT User manual

Service Manual
Air Conditioner – Multi Split Type System
Modular Multi System
HFCR407C
A90-0130

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Contents
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Outline of MMS (Modular Multi System) . . . . . . . . . . . . . . . . . . . 8
Parts Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Construction Views – Outdoor Units . . . . . . . . . . . . . . . . . . . . . . 14
Construction Views – Indoor Units. . . . . . . . . . . . . . . . . . . . . . . . 15
Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Refrigerant Piping Systematic Drawings . . . . . . . . . . . . . . . . . . 25
Combined Refrigerant Piping Systematic Drawings . . . . . . . . 28
Refrigerant Cycle Schematic. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Outline of Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Self Diagnostic Display Information . . . . . . . . . . . . . . . . . . . . . . 46
Control Circuit Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Backup Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
Forced Function of Oil Level Detection. . . . . . . . . . . . . . . . . . . 105
Refrigerant Pipe Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
Trial Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
Exploded Views and Service Parts. . . . . . . . . . . . . . . . . . . . . . . 124
Additional Literature and Contacts. . . . . . . . . . . . . . . . . . . . . . 134

Precautions
4
1
Introduction
Read these Safety Notes carefully before installing this unit.
These Safety Notes contain very important safety information. Always be sure to observe these
cautions.
After installation is complete, trial the operation of the unit to make sure that it is operating
normally. Instruct the customer about how to operate the unit, and about necessary
maintenance.
The dealer or a special contractor must install this unit.
Attempts to install this unit by a customer could result in leaks, electric shock, or fire.
Improper installation could result in leaks, electric shock, or fire.
If this unit is installed in a small room, measures must be taken to ensure that, even
in the event of a refrigerant leak, the maximum safe limit for refrigerant
concentration levels in the air is not exceeded.
Consult the dealer for details on what measures can be taken to keep from exceeding the
maximum safe limit. If a refrigerant leak does cause refrigerant concentration levels in the air
to exceed the maximum safe limit, asphyxiation could result.
Select a location for installation that will be able to safely bear the weight of the unit.
If the installation location is not strong enough to support the unit and the unit falls, injury
could result.
Install the unit in the prescribed manner to withstand strong (hurricane-level) winds
and earthquakes.
Insufficiently secure installation could allow the unit to tip over, fall, or otherwise cause an
accident.
Ventilate the area if any refrigerant leaks during installation.
If the refrigerant comes into contact with an open flame, it will produce a toxic gas.
After completing installation, make sure that no refrigerant is leaking.
If the refrigerant leaks indoors and comes into contact with an open flame in a water heater,
stove, oven, or other such appliance, it will produce a toxic gas.
Electrical work must be performed by a qualified electrician as described in the
Installation Manual.
The unit must be connected to its own independent circuit. Inadequate circuit capacity or
improper installation could result in electric shock or fire.
Wiring must be performed securely, using the prescribed cables.
The cables must be secured in a manner that prevents any force that pulls on the cables from
being relayed to the terminal connectors. If the cables are not connected or secured properly,
fire or other accidents could result.
The unit must be grounded.
Do not connect the ground wire to a gas pipe, water pipe, lightning rod, or telephone
ground wire. When wiring the system to the main power source, follow the standards
established by the local power company. Inadequate grounding can result in electric shock.
Do not install the unit in a location where combustible gases could conceivably leak.
Leaking gases that accumulate in the vicinity of the unit could be ignited by the unit.

Introduction
Components
5
1
Inverter unit Fixed-speed unit Appearance
Corresponding HP 8HP 10HP 6HP 8HP 10HP
Model name MM-A0224HT MM-A0280HT MM-A0160HX MM-A0224HX MM-A0280HX
Cooling capacity (kW) 22.4 28.0 16.0 22.4 28.0
Heating capacity (kW) 25.0 31.5 18.0 25.0 31.5
Corresponding HP 8HP 10HP 14HP 16HP 18HP 20HP 22HP 24HP 26HP 28HP 30HP 32HP 34HP 36HP 38HP 40HP 42HP 44HP 46HP
Combined Model MM-A~HT
0224 0280 0384 0440 0504 0560 0608 0672 0728 0784 0840 0896 0952 1008 1064 1120 1176 1232 1288
Cooling capacity (kW) 22.4 28.0 38.4 44.8 50.4 56.0 60.8 67.2 72.8 78.4 84.0 89.6 95.2 100.8 106.4 112.0 117.6 123.2 128.8
Inverter unit 8HP 10HP 8HP 8HP 10HP 10HP 8HP 8HP 10HP 10HP 10HP 8HP 10HP 10HP 10HP 10HP 10HP 10HP 10HP
— — 6HP 8HP 8HP 10HP 8HP 8HP 8HP 10HP 10HP 8HP 8HP 10HP 10HP 10HP 8HP 10HP 10HP
— — — — — — 6HP 8HP 8HP 8HP 10HP 8HP 8HP 8HP 10HP 10HP 8HP 8HP 10HP
— — — — — — — — — — — 8HP 8HP 8HP 8HP 10HP 8HP 8HP 8HP
— — — — — — — — — — — — — — — — 8HP 8HP 8HP
13 16 16 18 18 20 22 24 26 28 30 32 34 36 38 40 40 40 40
Min. HP Connected 4 5 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
Max. HP Connected 10.8 13.5 18.9 21.6 24.3 27 29.7 32.4 35.1 37.8 40.5 43.2 45.9 48.6 51.3 54 56.7 59.4 62.1
Combined
outdoor
units
No. of connectable
indoor units
Fixed-
speed unit
1. Outdoor Unit
2. Outdoor Units (Combination of Outdoor Units)
(*1). Code is determined according to the capacity code of the indoor units connected.
(*2). If the total capacity code value of indoor units exceeds that of outdoor units, apply the
capacity code of outdoor units.
(*3). When using a branch header, indoor units with a maximum of 6.0 capacity code in total
can be connected to each branch.
NOTE: If the length of the gas pipe exceeds 30m from the 1st branching to an indoor unit,
increase the gas pipe size by 1 size, i.e. MM-U140 = Gas Ø22.2, Liquid Ø9.5
Model name Usage Appearance
RBM-Y018 Indoor unit capacity code (*1): Total below 6.4
Y-shape branching joint RBM-Y037 Indoor unit capacity code (*1): Total 6.4 or more and below 13.2 (*2)
RBM-Y071 Indoor unit capacity code (*1): Total 13.2 or more and below 25.2 (*2)
RBM-Y129 Indoor unit capacity code (*1): Total 25.2 or more (*2)
4-branching header (*3) RBM-H4037 Indoor unit capacity code (*1): Total below 13.2 Max. 4
RBM-H4071 Indoor unit capacity code (*1): Total 13.2 or more and below 25.2 branches
8-branching header (*3) RBM-H8037 Indoor unit capacity code (*1): Total below 13.2 Max. 8
RBM-H8071 Indoor unit capacity code (*1): Total 13.2 or more and below 25.2 branches
1 set of 3 types of T-shape joint pipes as described below:
The required quantity is arranged and they are combined at the site.
T-shape branching joint
(For connection of RBM-T129
outdoor unit)
Connecting pipe Corresponding dia. (mm). Qty
Balancing pipe Ø9.52 1
Piping at liquid side Ø12.7 to Ø22.2 1
Piping at gas side Ø22.2 to Ø54.1 1
3. Branching joints/headers

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2
Operating Conditions
Summary
The units referred to within this manual conform with the protection requirements of
Directives 89/336/EEC Electromagnetic Compatibility and 73/23/EEC Low voltage.
Operating conditions of the unit are as follows:
Outdoor temperature -5 ~ 43°C Cooling
-15 ~ 21°C Heating
Room Temperature 18 ~ 32°C Cooling
15 ~ 29°C Heating
Room humidity <80% Cooling
Note 1: Cooling capacity is rated at the following temperature conditions:
Indoor air inlet temperature 27°C DB, 19°C WB.
Outdoor air inlet temperature 35°C DB.
Note 2: Heating capacity is rated at the following temperature conditions:
Indoor air inlet temperature 20°C DB.
Outdoor air inlet temperature 7°C DB, 6°C WB.
Note 3: For details about the Outdoor unit, Indoor units or Remote Controller installation
refer to the relevant literature, i.e. Installation Instructions supplied with the units.
Note 4: Operatives handling refrigerants must be suitably qualified in accordance with local
and national codes of practice and statutory requirements.
Note 5: Legislation may regulate the removal of waste refrigerant from the systems. We advise
awareness of any regulations and duty of care. Waste refrigerant must NEVER be
discharged to atmosphere.
Note 6: Electrical work should be in accordance with all relevant codes of practice and should
be carried out by suitably qualified personnel.
Note 7: Metric/Imperial pipe conversion.
1 5/8
Note 8: Within this manual:
ODU = Outdoor Unit IDU = Indoor Unit
R/C = Remote Controller D.O.L. = Direct On-Line compressor
INV = HP Inverter ODU FIX = HP Fixed Speed ODU
DB = Dry Bulb WB = Wet Bulb
Mg-Sw = Magnetic Contactor IOL = Inner Overload Relay
OCR = Over Current Relay IGBT = Inverter Gate Bi-Polar Transistor
Note 9: MPaG ⇒kgf/cm2G Conversion multiplier
10MPaG = 10.2kgf/cm2G
Diameter (mm) 6.4 9.5 12.7 15.9 19.0 22.0 28.6 34.9 41.3 54.1
Nominal diameter (inch) 1⁄43⁄81⁄25⁄83⁄47⁄811⁄813⁄815⁄821⁄8

Summary
Operating Conditions
7
2
1. Model name
2. Range of combined units
No. of combined units : 1 to 5 units
Capacity range : Equivalent to 38.4kW type (14HP) to 128.8kW (46HP)
3. Restriction for combination units
(1) The Inverter Unit should have the maximum capacity among all units in
that combination.
(2) The 16.0kW (6HP) fixed-speed unit is available only with the combination of 38.4kW
(14HP) and 60.8kW (22HP). (It cannot be used for any other combination.)
4. Mode priority
This Outdoor Unit is set to operate with the Heating mode taking precidence. This
precidence can be switched between Heat and Cool mode using the DIP switch 07
on the Outdoor Unit Interface PCB (MCC-1343-01) as follows:
T – Inverter
X – Fixed Speed
0280 – 28.0kW (10HP)
0224 – 22.4kW (8HP)
0160 – 16.0kW (6HP)
C – Cooling
H – Heating
MM–A0280HT
INDOOR
OUTDOOR
A – Outdoor
Modular Multi
028 – 2.8kW (1HP)
042 – 4.2kW (1.5HP)
056 – 5.6kW (2HP)
080 – 8.0kW (3HP)
112 – 11.2kW (4HP)
140 – 14.0kW (5HP)
MM–TU056
Modular Multi
B – Built-In Duct Type
C (CR)– Ceiling Type (IR Remote)
K (KR) – High Wall Type (IR Remote)
N – Carcase Type
S (SR) – Low Wall Type (IR Remote)
SB – Built-In Slim Duct Type
TU – 2 Way Cassette Type
U – 4 Way Cassette Type
ON
OFF ON OFF
Heat Priority (factory set) Cool Priority

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8
3
Outline of MMS (Modular Multi System)
• Non-polarized control wiring between
outdoor and indoor units
• Wiring diagnosis system
[Example of wiring diagnosis]
Use the switches on the microcomputer
PCB of the outdoor unit.
• Detects wiring to the indoor unit b4
which should not be in system A.
• b4 is missing in system B.
Outdoor unit
Indoor unit
Indoor unit
Piping
Wiring
System A
System B
Outdoor
unit
1st branching
section
Height difference between indoor unit and outdoor unit: 30m
Height difference between indoor unit and outdoor unit: 50m
From 1st branching to the
farthest indoor unit: 50m
Allowable pipe length :
100m real length
(Equivalent to 125m)
Outdoor
unit
Outdoor
unit
Compact design
The design of the Toshiba MMS outdoor unit allows for easy unit
maneuvering into any standard lift. Its size also allows it to be easily
installed in limited spaces.
Largest system capacity
Toshiba’s Multi Modular System can be combined up to 128.8kW
(46 HP).
Advanced bus communication system
Wiring between indoor and outdoor unit is a simple 2-wire system.
Communication address is also automatically configured.
A default test mode operation is available.
Self diagnostic system
Comprehensive troubleshooting code enables quick identification of
problems arising.
High lift design
Real pipe length of 100m (equivalent length 125m) and vertical lift of
50m is made possible with Toshiba’s Multi Modular System.
Vertical lift between indoor units of 30m is the highest in the market.
This allows for greater flexibility in the location of the system.
Multiple indoor units
Indoor units with different capacities and configurations can be
combined up to 135% of the outdoor unit capacity.
A maximum of 40 indoor units can be combined with the 46 HP
outdoor module.
Intelligent control
Toshiba’s MMS intelligent controls and modulating valves deliver the
required capacity, according to the load variation from 50% to 100%.
The intelligent controls and modulating valves limit or increase the
cooling/heating capacity dynamically so humidity and temperature
are kept in the comfort zone.
Outline of MMS (Modular Multi System)
Branching
Line Branching
Header Branching
Line + Header Branching
Line Branching after Header Branching
Combination of line and header branching is highly flexible. This allows
for the shortest design route possible, thereby saving on installation
time and cost. Line/header branching after header branching is only
available with Toshiba’s Multi Modular System.
Outdoor Unit
Outdoor Unit
Outdoor Unit
Outdoor Unit
Outdoor Unit
Indoor Unit
Indoor Unit
Indoor Unit
Indoor Unit
Indoor Unit
Branching joint
Branching joint
Branching joint
Branching
Header
Header
Header
Header
Header
MMS
Only
MMS
Only
8F
7F
2F
1F

10
4
Parts Specifications
Indoor Units
Type Appearance Model name Capacity code Cooling Capacity Heating Capacity
(kW) (kW)
MM-U056 2 5.6 6.4
MM-U080 3 8.0 9.6
MM-U112 4 11.2 12.8
MM-U140 5 14.0 15.8
MM-TU028 1 2.8 3.2
MM-TU042 1.5 4.2 4.8
MM-TU056 2 5.6 6.4
MM-SB028 1 2.8 3.2
MM-B056 2 5.6 6.4
MM-B080 3 8.0 9.6
MM-B112 4 11.2 12.8
MM-B140 5 14.0 15.8
MM-C/CR042 1.5 4.2 4.8
MM-C/CR056 2 5.6 6.4
MM-C/CR080 3 8.0 9.6
MM-C/CR112 4 11.2 12.8
MM-C/CR140 5 14.0 15.8
MM-K/KR042 1.5 4.2 4.8
MM-K/KR056 2 5.6 6.4
MM-K/KR080 3 8.0 9.6
MM-N028 1 2.8 3.2
MM-N042 1.5 4.2 4.8
MM-N056 2 5.6 6.4
MM-N080 3 8.0 9.6
MM-S/SR056 2 5.6 6.4
MM-S/SR080 3 8.0 9.6
4 Way Cassette
Type ‘U’
2 Way Cassette
Type ‘TU’
Built-In Slim
Duct Type ‘SB’
Built-In Duct,
Type ‘B’
Ceiling
Type ‘C’
High Wall
Type ‘K’
Carcase
Type ‘N’
Low Wall
Type ‘S’

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4
Parts Specifications
Outdoor Units
COMPRESSOR MODEL
MM-A0280HT MM-A0224HT MM-A0280HX MM-A0224HX MM-A0160HX
Model Name MG1450CW-21B YG1800CW-B1 YG1700CW-B1 YG890C-B1
Motor Type 3 – Phase induction motor
Power Supply 380 – 415V, 3 – Phase, 50Hz
Output (kΩ) 7.5 7.5 7.5 7.5 4.1
Pole (P) 2/2 (INV/Fixed) 2/2 (Fixed/Fixed) 2
Coil Resistance (W) 1.18/2.25 (INV/Fixed) 2.25/2.25 (Fixed/Fixed) 2.250
Comp. Oil Name NISSEKI RB68AF VG 74
Amount of Oil (ml) 7500 7500 7500 7500 2000
Inner Over-load Relay Opens: 115±5 °C Closes: 93±10°C
PARTS NAME SPECIFICATION
Model Name STF-200-350A
Motor Type 1-Phase induction motor
Fan Motor Power Supply AC 220-240V, 1 Phase, 50Hz
Output (W) 400
Current (A) 4.81~5.89
Pole (P) 6
High Pressure Switch Model Name INV=ACB-JB128 FIX=ACB-JA64
Operating Pressure (kgf/cm2G) Operation: 3.2, Reset 2.55
High Pressure Sensor Model Name 150NH4-H
Operating Conditions 0~3.33MPa
Low Pressure Sensor Model Name 150NH4-L
Operating Conditions 0~0.98MPa
Compressor Case Heater AC240V, 74W
Accumulator Case Heater AC240V, 29W
Discharge Temperature Sensor At 50ºC=18.1KΩ, At 100ºC=3.35KΩW,
Suction Temperature Sensor At 0ºC=34.6KΩ, At 25ºC=10.0KΩ, At 50ºC=3.4KΩ
Pulse Modulating Valve L12A-03, DC12V
Pulse Modulating Valve (For Cooling Bypass) A12A-15, DC12V
2-way Valve VPV-603D, Coil 240V
2-way Valve NEV-202D, Coil 240V
4-WAY VALVE MODEL
MM-A0280HT MM-A0224HT MM-A0280HX MM-A0224HX MM-A0160HX
Model Name CHV-0712 CHV-0712 CHV-0712 CHV-0712 CHV-0401
Coil Specification AC240V AC240V AC240V AC240V AC240V
MM-A0280HT, MM-A0224HT, MM-A0280HX, MM-A0224HX, MM-A0160HX

12
4
Parts Specifications
Indoor Units
No. PARTS NAME TYPE SPECFICATIONS
1 Fan Motor STF-200-140-4F Output (rated) 140W, 4 pole, 200V, 1 Phase 50Hz
2 Running Capacitor – fan motor EAG40M106UF AC 400V 10µF
3 Pulse Motor Valve EDM-B60YPTF-7B-A Capacity: 60
Built-In Duct:MM-B140
No. PARTS NAME TYPE SPECFICATIONS
1 Fan Motor STF-200-120-4B Output (rated) 120W, 4 pole, 200V, 1 Phase 50Hz
2 Running Capacitor – fan motor EAG40M505UF AC 400V 5µF
3 Pulse Motor Valve EDM-B40YPTR-7B-A Capacity: 40
Built-In Duct:MM-B112
No. PARTS NAME TYPE SPECFICATIONS
1 Fan Motor STF-200-100-4B Output (rated) 100W, 4 pole, 200V, 1 Phase 50Hz
2 Running Capacitor – fan motor EAG40M505UF AC 400V 5µF
3 Pulse Motor Valve EDM-B40YPTR-7B-A Capacity: 40
Built-In Duct:MM-B080
No. PARTS NAME TYPE SPECFICATIONS
1 Fan Motor STF-230-60-4A Output (rated) 60W, 4 pole, 230V, 1 Phase 50Hz
2 Running Capacitor – fan motor EEP2G405HQA114 AC 400V 4µF
3 Pulse Motor Valve EDM-B40YPTR-7B-A Capacity: 40
Built-In Duct:MM-B056
No. PARTS NAME TYPE SPECFICATIONS
4 Transformer TT-03-1 DC 16.3V 0.5A/AC 11.6V 0.15A
5 Pulse Motor EDM-MD12TF-3 DC12V
6 Pressure Sensor 150/100NH6-D Power Voltage DC 12V
7 Sensor for room temperature TA Maximum input °C 25 50
38mA (at 25°C) kΩ10 3.45
8 Sensor for heat exchanger Tc1 Maximum input °C -12 0 25 50
34mA (at 25°C) kΩ62.3 32.8 10 3.6
9 Sensor for heat exchanger Tc2 Maximum input °C 0 25 50
26mA (at 25°C) kΩ34.6 10 3.4
10 Control PCB CM00C02 AC 220-240V
11 Power PCB P00RC01 AC 220-240V
Built-In Duct: MM-B140, MM-B112, MM-B080, MM-B056
No. PARTS NAME TYPE SPECFICATIONS
1 Fan Motor SMF-230-34-4J Output (rated) 34W, 4 pole, 230V, 1 Phase 50Hz
2 Running Capacitor - fan motor EEP2H105HQA105 AC 500V 1.0µF
3 Pulse Motor Valve EDM-B25YPTF-7B-A Capacity: 25
4 Transformer TT-03-1 DC 16.3V 0.5A/AC 11.6V 0.15A
5 Pulse Motor EDM-MD12TF-3 DC12V
6 Pressure Sensor 150/100NH6-D Power Voltage DC 12V
7 Sensor for room temperature TA Maximum input °C 25 50
38mA (at 25°C) kΩ10 3.45
8 Sensor for heat exchanger Tc1 Maximum input °C -12 0 25 50
34mA (at 25°C) kΩ62.3 32.8 10 3.6
9 Sensor for heat exchanger Tc2 Maximum input °C 0 25 50
26mA (at 25°C) kΩ34.6 10 3.4
10 Control PCB CM00C02 AC 220-240V
11 Power PCB P00RC01 AC 220-240V
Built-In Slim Duct: MM-SB028

13
4
Parts Specifications
Indoor Units
No. PARTS NAME TYPE SPECFICATIONS
1 Fan Motor MMF-230-36A Output (rated) 36W, 6 pole, 230V, 1 Phase 50Hz
2 Running Capacitor – fan motor EVM45M305UF AC 450V, 3.0µF
3 Pulse Motor Valve EDM-B60YPTF-7B-A Capacity: 60
4-Way Cassette: MM-U140
No. PARTS NAME TYPE SPECFICATIONS
1 Fan Motor MMF-230-36A Output (rated) 36W, 6 pole, 230V, 1 Phase 50Hz
2 Running Capacitor – fan motor EEP2W255HQA113 AC 450V 2.5µF
3 Pulse Motor Valve EDM-B40YPTR-7B-A Capacity: 40
4-Way Cassette: MM-U112
No. PARTS NAME TYPE SPECFICATIONS
1 Fan Motor MMF-230-28A Output (rated) 28W, 6 pole, 230V, 1 Phase 50Hz
2 Running Capacitor – fan motor EEP2W205HQA107 AC 450V 2.0µF
3 Pulse Motor Valve EDM-B40YPTR-7B-A Capacity: 40
4-Way Cassette: MM-U080
No. PARTS NAME TYPE SPECFICATIONS
1 Fan Motor MMF-230-28A Output (rated) 28W, 6 pole, 230V, 1 Phase 50Hz
2 Running Capacitor – fan motor EEP2H105HQA105 AC 500V 1.0µF
3 Pulse Motor Valve EDM-B40YPTR-7B-A Capacity: 40
4-Way Cassette: MM-U056
No. PARTS NAME TYPE SPECFICATIONS
4 Transformer TT-03-1 DC 16.3V 0.5A/AC 11.6V 0.15A
5 Pulse Motor EDM-MD12TF-3 DC12V
6 Pressure Sensor 150/100NH6-D Power Voltage DC 12V
7 Sensor for room temperature TA Maximum input °C 25 50
38mA (at 25°C) kΩ10 3.45
8 Sensor for heat exchanger Tc1 Maximum input °C -12 0 25 50
34mA (at 25°C) kΩ62.3 32.8 10 3.6
9 Sensor for heat exchanger Tc2 Maximum input °C 0 25 50
26mA (at 25°C) kΩ34.6 10 3.4
10 Control PCB CM00C02 AC 220-240V
11 Power PCB P00RC01 AC 220-240V
4-Way Cassette: MM-U140, MM-U112, MM-U080, MM-U056

130
145
140
170
125
64
20
65 35
60 115
173
14
5
Construction Views
Outdoor Units
MM-A0280HT, MM-A0280HX, MM-A0224HT, MM-A0224HX, MM-A0160HX
700
990
790
500
1700
1560
700 9088
610 100
700
750
100
630 80
755
80
245
190 755
235
Model ØA ØB ØC
mm mm mm
MM-A0280HT, MM-A0280HX 22.2 12.7 9.52
MM-A0224HT, MM-A0224HX 22.2 12.7 9.52
MM-A0160HX 22.2 9.52 9.52
4-15 x 20 (Slot)
Fixing bolt pitch
Fixing bolt pitch
(including fixed leg)
Grounding part
of bottom plate Base
Fixing bolt pitch
Base
Fixing bolt pitch
Refrigerant pipe connecting port
(Gas side) braze connection (ØA)
Refrigerant pipe connecting port
(Liquid side) flare connection (ØB)
Balance pipe connecting
port flare connection (ØC)
(Slot pitch)
2-60 x 150 Slot
(for transport)
(knock out)
Refrigerant pipe
connecting port
(Liquid side)
Balance pipe
connecting port
Refrigerant pipe
connecting port
(Gas side)
(knock out)
Details of piping
connections
Base bolt position
Note: All dimensions in (mm)

15
6
Construction Views
Indoor Units
15
Built-In Duct
MM-B056, MM-B080, MM-B112, MM-B140
200
450
450
300-400
Inspection
hole
Provide an inspection
hole in this position
Ensure that there is sufficient space around the
indoor unit for installation and servicing
Indoor unit
Model A B E ØF ØG H J K M N
MM-B056 700 750 780 12.7 6.4 252 280 280 1 2
MM-B080 1,000 1,050 1,080 15.9 9.5 252 580 290 2 3
MM-B112, B140 1,350 1,400 1,430 19.0 9.5 252 930 310 3 4
(Gas ØF)
Hanging Bolt Pitch B Refrigerant Pipe
Connection
Unit Dimension A
Hanging Bolt
4-M10
Provided at site
Nx Ø200
Air Outlet
Drain pipe connection
(inner diameter 32)
(diameter 32 minimal for PVC pipes)
Refrigerant pipe
connection (Liquid ØG)
Hanging Bolt Pitch:565
Unit Dimension:800
J = M x K (H)
6 x Ø4 holes (Ø160)
Fresh air inlet Ø125
cut-out (other side)
Filter kit
(Unit: mm)

16
6
Construction Views
Indoor Units
Built-In Slim Duct
MM-SB028
158
45
57
81 333
700
450
125
125
12
150
200
500
480
397
700
750
800
220
700
150 150150
150
342.5 342.5
75
75
37.5
480
220
265
276
331
364
391
480
200
150
35 35
Refrigerant pipe
connection
(Gas Ø12.7)
Refrigerant pipe
connection
(Liquid Ø6.4)
Washable filter
Air outlet
Air inlet
Filter
Filter
Hanging bolt pitch
Hanging bolt
pitch
Unit dimension
Unit dimension
Optional Air Flow (Lower air inlet)
Shelter board
Shelter board
Air flow
Air flow
Drain pipe connection (1" BSP threaded connection)
Electrical box (PCB, Transformer and MF Capacitor)

17
6
Construction Views
Indoor Units
4-Way Cassette
MM-U056, MM-U080
195
106
106
298
138 160
259
30
39
20
30
40
536
405
400
268 195
536
130
30
940
940
80
240
138
185
170
100
73
140
200
80
10
30 6
32
130
130
80
10
30 2
Knockout for side ducts Ø150
(both sides)
Ceiling Drain pipe connection
(1" BSP threaded
connection)
Wiring connection
(Gland plate 3xØ20 holes)
Refrigerant pipe connection
(Gas ØA)
Refrigerant pipe connection
(Liquid ØB)
Ø150
Ø144
Ø30
Ø97
Ø100
Ø200
6-Ø6
4-Ø6
Ø180
Ø130
Ø144
45°
45°
45°
Ø180
45°
Side outlet duct size
Fresh air inlet duct size
Condensate pipe 1" BSP
threaded connection
Fresh air inlet
620 Hanging bolt pitch
820 External cassette dimension
880 Ceiling opening
940 Panel dimension
800 Hanging bolt pitch
820 External cassette dimension
880 Ceiling opening
940 Panel dimension
Model (MM-) U056 U080
ØA 12.7 15.9
ØB 12.7 9.5

18
6
Construction Views
Indoor Units
4-Way Cassette
MM-U112, MM-U140
30
202
941
106
210
348
309
138
30
39
20
106
40 30
610
605
940
30
130
940
1350
80
240
138
185
170
100
73
140
200
80
10
30 6
32
130
130
80
10
30 2
Knockout for side ducts Ø150
(both sides)
Ceiling
Ceiling
panel Drain pipe connection
(1" BSP threaded
connection)
Wiring connection
(Gland plate 3xØ20 holes)
Refrigerant pipe connection
(Gas side Ø19.0)
Refrigerant pipe connection
(Liquid side Ø9.5)
Ø150
Ø144
Ø30
Ø97
Ø100
Ø200
6-Ø6
4-Ø6
Ø180
Ø130
Ø144
45°
45°
45°
Ø180
45°
Side outlet duct size
Fresh air inlet duct size
Condensate pipe
1" BSP threaded connection
Fresh air inlet
620 Hanging bolt pitch
820 External cassette dimension
880 Ceiling opening
940 Panel dimension
800 Hanging bolt pitch
820 External cassette dimension
880 Ceiling opening
940 Panel dimension

19
7
Wiring Diagrams
Outdoor Units
Inverter Unit (10HP, 8HP)
MM-A0280HT, MM-A0224HT
TK2
RED
RED
WHI
BLU
BLU
BLK
BLK
CN515
(BLU)
3 1
3 1
CN402 CN403
CN401CN400
(WHI)
(BLU)
WHI
BLK
GRY
ON 1 2 3 4
SW06
ON 1 2 3 4
SW07
SW04
SW05SW03 SW02 SW01
ON 1 2
SW08
ON 1 2
SW09
D716 D717 D715D714
6 5 4 3 2 1
6 5 4 3 2 1
6 4 3 2 1
CN311
CN312
CN313
CN314
BLU
BLU
BLU
BLU
BLU BLU
BLU BLU
(BLU) (BLK)
(BLU)
(BLK)
BLU
BLU
PMV
1PMV
2PMV
3
CN300 CN301 CN302
D801
D802
RED
BLU
ORG
YEL
WHI
RED
BLU
ORG
YEL
WHI
GRY
RED
BLU
ORG
YEL
WHI
(WHI) (WHI) (RED)
Interface Control PC Board
MCC
-
1343
-
03
CN602
(WHI) CN601
(BLU)
BLU
52C2
FL1
FL2
RED
RED
RED
RED
RED
REDREDRED
WHI
WHI BLK
BLK GRY
GRY
CN01
CN02
CN03
CN04
CN17
CN18 CN19 CN20
GRY
(WHI) (BLU)
RED
WHI
BLK
GRY
MCC
-
1366
-
01
L1
L2
L3
N
RED
WHI
BLK
GRY
RED
WHI
BLK
(D.O.L.)
(RED)
ORG
ORG
RED
WHI
(WHI)
WHI
PNK
49C2
GRY
GRY
YEL
BLK
BLK
(RED)
63H2
RED
ORG
GRY
BRN
BLK
PUR
BRN
CN307
CN308
(WHI) (BLK)
CN304
(RED)
(BLU)
CN316
CN317
AH
ORG
ORG
BLK
RED (WHI)
BLU BLU
1 1
3 3
7 7 5 5
1 1
3 3
1 1
3 3
5 5
7 7
SV3A
SV2
SV3C
SV3B
GRY
4 2 1
4 2 1
1 1
3 3
1 1
3 3
FM
BLK
RC
N T1 T2 T3 E
N L1 L2 L3 E
6 4 3 2 1 6 4 3 2 1
6 4 3 2 1
R
SU
V
51C 52C1
U
V
W
GRY
GRY
GRY
GRY
CN604
(WHI)
12
12
BLK
TK3
TD1
TS1
TE TD2
BLK
BLK
BLK
BLK
BLK
BLK
BLK
BLK
BLK
3 1 3 1 3 1
3 1
CN502
CN505 CN504 CN503
(BLU) (WHI) (RED) (WHI) (GRN)
3 1
CN600
(WHI)
3 1
CN501
CN500 CN100 CN516
TK1
CN507 (RED)
(BLU)
(WHI)
(BLK)
RED
BLK
BLK
BLK
WHI
3 1
3 1
3 1
3 1
49C1
ORG
BLK
BLK
YEL
BLU
BLU
WHI
WHI
(WHI)
WHI
WHI
WHI
WHI
BLU
BLU
BLU
CN11 CN08 CN09 PO5 PO4
CN07
(WHI)
T03
CN10
PINK
RED
BLU
WHI
BLK
12345
12345
CN501
(BLK)
11 T02
CN01
CN02 CN03 CN14
CN15 CN16
CN04
CN06
(BLU)
(BLK)
RED GRY
RED BLU
BLK RED WHI
11
11
33
33
33
D406
MCC
-
1342
-
01
FL3
21
21
21
21
4 3 1
4 3 1
RED
BLK
WHI
4 3 2
4 3 2
1 1
3 3
1 1
3 3
1 3
1 3
1 3
1 3
5 3 1
5 3 1
5 3 1
5 3 1 5 3 1
5 3 1
5 3 1
5 3 1 5 3 1
5 3 1
5 3 1
5 3 1 5 3 1
5 3 1
5 3 1
5 3 1
1 2 3 4
20SF
3 1 3 1
3 1 3 1
CM2
SV42
21
21 21
21
CN22 CN23
(WHI)
ORG
BLK
6 5 4 3 2 1
6 5 4 3 2 1
CM1
RED
WHI
BLK
63H1
BLK BLK
(BLK)
ORG
BLK
ORG
PQ
PQ
XY
XY
PQ
12
12
12
12
Symbol Part Name CM 1, 2 Compressor FM Fan motor 52C 1, 2 Electromagnetic contactor
for compressor
49C 1, 2 Inner overload relay 51C Overload relay PMV 1, 2, 3 Electronic flow control valve 63H 1, 2 High pressure switch RC Running capacitor SV Two-way valve 20SF Four-way valve Tr Transformer AH Accumulator heater
Temperature sensor Ferrite Core
FL 1, 2, 3 Fuse (20 AMP)
42, 2 3A, 3B, 3C
TD1, 2 TE TK1, 2, 3 TS
MCC-1342-01
MCC-1366-01
RC
L1 L2 L3
N
FL1 FL2 FL3
52C2 51C2
52C1
X YP Q
MCC-1343-03
Power Supply
Electolytic Capacitor
Posistor
Parts Layout
Filter Board
Posistor
Pressure
Sensor
PD
Pressure
Sensor
PS
Reactor
Reactor
Electrolytic
Capacitor
Tr
(Inverter)
IPDU Board
Isolator
1. The dashed line indicates wiring on the site. 2. and indicates terminal blocks and the
numbers within them are terminal numbers.
3. indicates a printed circuit board.
Power Supply
50H
z
3N~380/415V

20
7
Wiring Diagrams
Outdoor Units
ORG
(BLK)
5 3 1
5 3 1
ON 1 2 3 4
SW06
ON 1 2 3 4
SW07
SW04
SW05 SW03 SW02 SW01
ON 1 2
SW08
ON 1 2
SW09
D716 D717 D715D714
CN311
CN312
CN313
CN314
CN315
CH
BLU
BLU
BLU
BLU
BLU
BLU BLU BLU
(BLU)
(BLK) (BLU) (BLK)
BLU
BLU
(WHI) (RED) (BLU)
CN316
CN317
CN304
ORG
ORG
AH
ORG
ORG
1 1
3 3 (WHI)
RED BLK
CN03
CN01 CN02
MCC
-
1357
-
01
PMV
2
CN300 CN301 CN302
D801
D802
RED
BLU
ORG
YEL
WHI
RED
BLU
ORG
YEL
WHI
GRY
RED
BLU
ORG
YEL
WHI
3 1
3 1 3 1
3 1
(WHI) (RED)
(WHI)
BLK
(BLU) CN501
CN500
CN100
CN516
TK1
TK3
TD1
TS
TE TD2
CN507
CN502
CN601 CN505 CN504 CN503
BLK
BLK
BLK
BLK
BLK
BLK
BLK
BLK
BLK
(BLU) (WHI) (RED) (WHI) (GRN) (RED)
(BLU)
(WHI)
(BLK)
RED
RED
BLK
BLK
WHI
WHI
3 1 3 1
3 1 321 3 1
3 1
4 3 1
4 3 1
4 3 2
4 3 2
3 1
3 1
TK2
CN306
RED
(RED)
51C1 52C1
RED
WHI
BLK
49C1
YEL
63H1
GRY
(D.O.L.)
(RED)
GRY
ORG
BRN
(RED)
BRN
BLK
PUR
GRY
GRY
RED WHI
BLU BLU
BLK
BLK
1234
1234
CN515
(BLU)
CN402 CN403
CN305 CN401 CN400
(WHI)
(BLU)
WHI
(BLU)
5 3 1
5 3 1
BLK
3 1
3 1
1 3
1 3
1 3
1 3
CM1
12
12
12
12
49C2
BLK
WHI
RED
(D.O.L.)
CM2
51C2 52C2
RC
4 2 1
L1
L2
L3
N
RED
WHI
BLK
GRY
RED
WHI
BLK
RED
WHI
4 2 1
RED WHI BLK
(WHI)
GRY
GRY
ORG
(BLK)
BLK RED
YEL
63H2
GRY
BRN
BLK
PUR
BRN
ORG
GRY
GRY
CN307
5 3 1
5 3 1
CN308
5 3 1
5 3 1
1 2 3 4
1 2 3 4
1 2 3 4
1 2 3 4
5 3 1
5 3 1
5 3 1
5 3 1
5 3 1
5 3 1
BLK
BLK
3 1
3 1
21
21
21
21
21
21
21
6 5 4 3 2 1
6 5 4 3 2 1
PMV
3
6 4 3 2 1
PMV
1
1 1
3 3
5
7
1 1
3 3
SV2
SV41
SV3A
7 7 5 5
1 1
3 3
1 1
3 3
SV3C
SV3B
1 1
3 3
1 1
3 3
1 1
3 3
20SF
1 1
3 3
FM
N T1 T2 T3 E
N L1 L2 L3 E
BLU BLU
(WHI) (BLK)
BLU BLU
(WHI) (BLU)
P Q
P QP Q
SV42
BLU
BLU 5
7
6 4 3 2 1 6 4 3 2 1
6 4 3 2 1
U
V
W
RED
BLK
GRY
GRY
Interface Control PC Board
MCC
-
1343
-
03
CN604
(WHI)
12
Power Supply
50H
z
3N~380/415V
Isolator
Pressure
Sensor
PD
Pressure
Sensor
PS
Tr
Symbol Part Name CM 1, 2 Compressor FM Fan motor 52C 1, 2 Electromagnetic contactor
for compressor
49C 1, 2 Inner overload relay 51C 1, 2 Overload relay PMV 1, 2, 3 Electronic flow control valve 63H 1, 2 High pressure switch RC Running capacitor SV Two-way valve 20SF Four-way valve CH Crank case heater Tr Transformer AH Accumulator heater
Temperature sensor Ferrite Core
41, 42, 2 3A, 3B, 3C
TD1, 2 TE TK1, 2, 3 TS
L1 L2 L3
N
P Q
RC
Tr
MCC-1343-03
MCC-1357-01
R S T
U V W
R S T
U V W
52C2 51C2
52C1 51C1
Surge
Absorber
Parts Layout 10,8 HP (Fixed)
1. The dashed line indicates wiring on the site. 2. and indicates terminal blocks and the
numbers within them are terminal numbers.
3. indicates a printed circuit board.
Fixed Speed Unit (10-HP, 8HP)
MM-A0280HX, MM-A0224HX

21
7
Wiring Diagrams
Outdoor Units
5 3 1
5 3 1
ON 1 2 3 4
SW06
ON 1 2 3 4
SW07
SW04
SW05 SW03 SW02 SW01
ON 1 2
SW08
ON 1 2
SW09
D716 D717 D715D714
CN311
CN312
CN313
CN314
CN315
CH
BLU
BLU
BLU
BLU
BLU
BLU BLU BLU
(BLU)
(BLK) (BLU) (BLK)
BLU
BLU
(WHI) (RED) (BLU)
CN316
CN317
CN304
ORG
ORG
AH
ORG
ORG
1 1
3 3 (WHI)
RED BLK
CN03
CN01 CN02
MCC
-
1357
-
01
CN300 CN302
D801
D802
RED
BLU
ORG
YEL
WHI
GRY
RED
BLU
ORG
YEL
WHI
3 1
3 1 3 1
3 1
(WHI) (RED)
BLK
(BLU) CN501
CN500
CN100
CN516
TK1
TK3
TD1
TS
TE
CN507
CN502
CN601 CN505 CN504
BLK
BLK
BLK
BLK
BLK
BLK
BLK
(BLU) (WHI) (WHI) (GRN) (RED)
(BLU)
(WHI)
(BLK)
RED
RED
BLK
BLK
WHI
WHI
3 1 3 1
3 1 321 3 1
3 1
4 3 1
4 3 1
4 3 2
4 3 2
3 1
3 1
TK2
CN306
RED
(RED)
51C1 52C1
RED
WHI
BLK
49C1
YEL
63H1
GRY
(D.O.L.)
(RED)
GRY
ORG
BRN
(RED)
BRN
BLK
PUR
GRY
GRY
RED WHI
BLU BLU
BLK
BLK
1234
1234
CN515
(BLU)
CN402 CN403
CN305 CN401 CN400
(WHI)
(BLU)
WHI
(BLU)
5 3 1
5 3 1
BLK
3 1
3 1
1 3
1 3
1 3
1 3
CM1
12
12
RC
4 2 1
L1
L2
L3
N
RED
WHI
BLK
GRY
RED
WHI
4 2 1
RED WHI BLK
(WHI)
GRY
GRY
1 2 3 4
1 2 3 4
5 3 1
5 3 1
BLK
BLK
3 1
3 1
21
21
21
21
21
21
21
6 5 4 3 2 1
6 5 4 3 2 1
PMV
3
6 4 3 2 1
PMV
1
1 1
3 3
5
7
1 1
3 3
SV2
SV41
SV3A
7 7 5 5
1 1
3 3
1 1
3 3
SV3C
SV3B
1 1
3 3
1 1
3 3
1 1
3 3
20SF
1 1
3 3
FM
N T1 T2 T3 E
N L1 L2 L3 E
BLU BLU
BLU BLU
(WHI) (BLU)
P Q
P QP Q
5
7
6 4 3 2 1 6 4 3 2 1
RED
BLK
GRY
GRY
BLK
5 3 1
5 3 1
Interface Control PC Board
MCC
-
1343
-
03
CN604
(WHI)
12
Power Supply
50H
z
3N~380/415V
Isolator
Surge
Absorber
Pressure
Sensor
PD
Pressure
Sensor
PS
Tr
Symbol Part Name CM 1Compressor FM Fan motor 52C 1Electromagnetic contactor
for compressor
49C 1Inner overload relay 51C 1Overload relay PMV 1, 3 Electronic flow control valve 63H 1High pressure switch RC Running capacitor SV Two-way valve 20SF Four-way valve CH Crank case heater Tr Transformer AH Accumulator heater
Temperature sensor Ferrite Core
41, 2 3A, 3B, 3C
TD1 TE TK1, 2, 3 TS
L1 L2 L3
N
P Q
RC
Tr
MCC-1343-03
MCC-1357-01
R S T
U V W
52C1
51C1
Parts Layout 6 HP (Fixed)
1. The dashed line indicates wiring on the site. 2. and indicates terminal blocks and the
numbers within them are terminal numbers.
3. indicates a printed circuit board.
Fixed Speed Unit (6HP)
MM-A0160HX