Technibel MCAV180R5VAA, KPAV180R5VAA, MCAV220R5VAA, KPAV220R5VAA, GR180R5TAA Technical Data & Service Manual

TECHNICAL DATA & SERVICE MANUAL

Indoor Unit Outdoor Unit

MCAV180/220R5VAA GR180R5TAA

KPAV180/220R5VAA GR220R5TAA

SPLIT SYSTEM AIR CONDITIONER

GR180R5TAA

GR220R5TAA

KPAV180/220R5VAA

MCAV180/220R5VAA

0.8180.165.0 02/2001

i

Important!
Please Read Before Starting

This air conditioning system meets strict safety and
operating standards. As the installer or service person,
it is an important part of your job to install or service the
system so it operates safely and efficiently.

For safe installation and trouble-free operation, you
must:

●Carefully read this instruction booklet before
beginning.

●Follow each installation or repair step exactly as
shown.

●Observe all local, state, and national electrical codes.

●Pay close attention to all warning and caution notices

given in this manual.

This symbol refers to a hazard or
unsafe practice which can result
in severe personal injury or
death.

This symbol refers to a hazard or
unsafe practice which can result
in personal injury or product or
property damage.

If Necessary, Get Help

These instructions are all you need for most installation
sites and maintenance conditions. If you require help
for a special problem, contact our sales/service outlet
or your certified dealer for additional instructions.

In Case of Improper Installation

The manufacturer shall in no way be responsible for
improper installation or maintenance service, including
failure to follow the instructions in this document.

Special Precautions

When Wiring

ELECTRICAL SHOCK CAN CAUSE
SEVERE PERSONAL INJURY OR
DEATH. ONLY A QUALIFIED,
EXPERIENCED ELECTRICIAN SHOULD
ATTEMPT TO WIRE THIS SYSTEM.

• Do not supply power to the unit until all wiring and
tubing are completed or reconnected and checked.

• Highly dangerous electrical voltages are used in this
system. Carefully refer to the wiring diagram and
these instructions when wiring. Improper connections
and inadequate grounding can cause accidental
injury or death.

• Ground the unit following local electrical codes.

• Connect all wiring tightly. Loose wiring may cause
overheating at connection points and a possible fire
hazard.

WARNING

CAUTION

WARNING

When Transporting

Be careful when picking up and moving the indoor and
outdoor units. Get a partner to help, and bend your
knees when lifting to reduce strain on your back. Sharp
edges or thin aluminum fins on the air conditioner can
cut your fingers.

When Installing…

…In a Ceiling or Wall

Make sure the ceiling/wall is strong enough to hold the
unit’s weight. It may be necessary to construct a strong
wood or metal frame to provide added support.

…In a Room

Properly insulate any tubing run inside a room to
prevent “sweating” that can cause dripping and water
damage to walls and floors.

…In Moist or Uneven Locations

Use a raised concrete pad or concrete blocks to
provide a solid, level foundation for the outdoor unit.
This prevents water damage and abnormal vibration.

…In an Area with High Winds

Securely anchor the outdoor unit down with bolts and a
metal frame. Provide a suitable air baffle.

…In a Snowy Area (for Heat Pump-type Systems)

Install the outdoor unit on a raised platform that is
higher than drifting snow. Provide snow vents.

When Connecting Refrigerant Tubing

• Use the flare method for connecting tubing.

• Apply refrigerant lubricant to the matching surfaces
of the flare and union tubes before connecting them,
then tighten the nut with a torque wrench for a leak­free connection.

• Check carefully for leaks before starting the test run.

When Servicing

• Turn the power off at the main power box (mains)
before opening the unit to check or repair electrical
parts and wiring.

• Keep your fingers and clothing away from any
moving parts.

• Clean up the site after you finish, remembering to
check that no metal scraps or bits of wiring have
been left inside the unit being serviced.

Others

• Ventilate any enclosed areas when installing or
testing the refrigeration system. Escaped refrigerant
gas, on contact with fire or heat, can produce
dangerously toxic gas.

• Confirm upon completing installation that no
refrigerant gas is leaking. If escaped gas comes in
contact with a stove, gas water heater, electric room
heater or other heat source, it can produce
dangerously toxic gas.

CAUTION

Table of Contents

Page

1 OPERATING RANGE 1
2 SPECIFICATIONS

2-1 Unit Specification 2
2-2 Major Component Specifications 6

2-3 Other Component Specifications 12
3 DIMENSIONAL DATA 15
4 REFRIGERANT FLOW DIAGRAM 19
5 PERFORMANCE DATA

5-1 Performance Charts 21
5-2 Air Throw Distance Chart 23
5-3 Cooling Capacity 29
5-4 Heating Capacity 33

6 ELECTRICAL DATA

6-1 Electrical Characteristic 34

6-2 Electric Wiring Diagrams 38
7 INSTALLATION INSTRUCTIONS

7-1 Installation Site Selection 42
7-2 Remote Control Unit Installation Position 44
7-3 Recommended Wire Length and Diameter 45

8 DISASSEMBLY PROCEDURE FOR INDOOR UNIT
8-1 Removing air intake grille 46
8-2 Removing side panels 47
8-3 Access and removal of electrical components box 47
8-4 Removing flap motor 48
8-5 Removing evaporator 48
8-6 Removing fan and fan motor 50

9 FUNCTION
9-1 Room Temperature Control 51
9-2 Dry Operation 53
9-3 Automatic Switching between Cooling and Heating 53
9-4 Freeze prevention 54
9-5 Overload Prevention 54
9-6 Cold Draft Prevention 55
9-7 Defrosting Operation 56
9-8 Outdoor Fan Speed Control 58

10 TROUBLESHOOTING

10-1 Check before and after troubleshooting 59

10-2 Air Conditioner Does not operate 60

10-3 Some Parts of Air Conditioner does not operate 64
10-4 Air Conditioner Operates, but abnormalities are observed 66
10-5 If a sensor is defective 68

11 CHECKING ELECTRICAL COMPONENTS
11-1 Measurements of insulation resistance 69
11-2 Checking continuity of fuse on PCB ass’y 70
11-3 Checking motor capacitor 70

ii

1

1. OPERATING RANGE

Temperature Indoor Air Intake Temp. Outdoor Air Intake Temp.

Cooling

Maximum 32°C D.B. / 23°C W.B. 43°C D.B.

Minimum 19°C D.B. / 14°C W.B. 19°C D.B.

Heating

Maximum 27°C D.B. 24°C D.B. / 18°C W.B.

Minimum 16°C D.B. – 8°C D.B. / –9°C W.B.

3

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

Remarks: Rating conditions are:

Cooling: Indoor air temperature 27°C D.B. / 19°C W.B.

Outdoor air temperature 35°C D.B. / 24°C W.B.

Heating: Indoor air temperature 20°C D.B.

Outdoor air temperature 7°C D.B. / 6°C W.B.

Power Source 230 V Single phase 50Hz
Voltage rating V 230

Cooling Heating

Capacity

kW 5.00 6.00

BTU/h 17100 20500

Air circulation (High) m

3

/h 760
Moisture removal (High) Liters/h 2.7 —
Available voltage range V 198 to 264
Running amperes A 9.8 10.3
Power input W 2100 2150
Power factor % 93 91
C.O.P. W/W 2.38 2.79
Compressor locked rotor amperes A 57
Controls / Temperature control Microprocessor / I.C. thermostat
Control unit Wireless remote control unit
Timer ON/OFF 24 hours & Daily program, 1-hour OFF
Fan speeds Indoor / Outdoor 3 and Auto / Auto(Hi, Lo)

Airflow direction (Indoor)

Horizontal Manual

Vertical Auto
Air filter Washable
Compressor Rotary (Hermetic)
Refrigerant / Amount charged at shipment g R22 / 1570
Refrigerant control Capillary tube

Noise power level

Indoor – Hi / Me / Lo dB-A 55 / 51 / 49

Outdoor – Hi dB-A 65
Refrigerant tubing connections Flare type
Max. allowable tubing length at shipment m 7.5

Refrigerant tube

Narrow tube mm (in.) 6.35 (1/4)
diameter

Wide tube mm (in.) 12.7 (1/2")

Indoor Unit Outdoor Unit

Unit dimensions Height mm 285 630

Width mm 995 830

Depth mm 206 305
Package dimensions Height mm 276 713

Width mm 1,070 994

Depth mm 363 413

Weight Net

kg 12.0 55

Shipping

kg 15.0 60

Shipping volume m

3

0.11 0.29

Dimensions & Weight Features Electrical Rating Performance

Indoor Unit MCAV180R5VAA
Outdoor Unit GR180R5TAA

2

2. SPECIFICATIONS

2-1. Unit Specifications

3

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

Remarks: Rating conditions are:

Cooling: Indoor air temperature 27°C D.B. / 19°C W.B.

Outdoor air temperature 35°C D.B. / 24°C W.B.

Heating: Indoor air temperature 20°C D.B.

Outdoor air temperature 7°C D.B. / 6°C W.B.

Power Source 220 – 240 V Single phase 50Hz
Voltage rating V 230

Cooling Heating

Capacity

kW 6.10 7.45

BTU/h 20800 25400

Air circulation (High) m

3

/h 830
Moisture removal (High) Liters/h 3.3 —
Available voltage range V 198 to 264
Running amperes A 12.0 13.6
Power input W 2650 2970
Power factor % 96 95
C.O.P. W/W 2.30 2.51
Compressor locked rotor amperes A 70
Controls / Temperature control Microprocessor / I.C. thermostat
Control unit Wireless remote control unit
Timer ON/OFF 24 hours & Daily program, 1-hour OFF
Fan speeds Indoor / Outdoor 3 and Auto / Auto(Hi, Lo)

Airflow direction (Indoor)

Horizontal Manual

Vertical Auto
Air filter Washable
Compressor Rotary (Hermetic)
Refrigerant / Amount charged at shipment g R22 / 2,280
Refrigerant control Capillary tube

Noise power level

Indoor – Hi / Me / Lo dB-A 58 / 55 / 52

Outdoor – Hi dB-A 68
Refrigerant tubing connections Flare type
Max. allowable tubing length at shipment m 7.5

Refrigerant tube

Narrow tube mm (in.) 6.35 (1/4)
diameter

Wide tube mm (in.) 15.88 (5/8)

Indoor Unit Outdoor Unit

Unit dimensions Height mm 285 835

Width mm 995 850

Depth mm 206 305
Package dimensions Height mm 276 913

Width mm 1,070 1,000

Depth mm 363 400

Weight Net

kg 12.0 70.0

Shipping

kg 15.0 79.0

Shipping volume m

3

0.11 0.37

Dimensions & Weight Features Electrical Rating Performance

Indoor Unit MCAV220R5VAA
Outdoor Unit GR220R5TAA

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

Remarks: Rating conditions are:

Cooling: Indoor air temperature 27°C DB / 19°C WB

Outdoor air temperature 35°C DB / 24°C WB

Heating: Indoor air temperature 20°C DB

Outdoor air temperature 7°C DB / 6°C WB

Power Source 220 – 240 V ~ 50 Hz
Voltage rating V 230

Cooling Heating

Capacity

kW 5.0 6.0

BTU/h 17000 20500

Air circulation (High) m

3

/h 800
Moisture removal (High) Liters/h 1.4 —
Available voltage range V 198 to 264
Running amperes A 9.8 10.3
Power input W 2100 2150
Power factor % 94 90
C.O.P. W/ W 2.40 2.80
Compressor locked rotor amperes A 57
Controls / Temperature control Microprocessor / I.C. thermostat
Control unit Wireless remote control unit
Timer ON / OFF 24-hours & Daily Program
Fan speeds Indoor / Outdoor 3 and Auto / Auto (Hi, Lo)

Airflow direction (Indoor)

Horizontal Manual

Vertical Auto
Air filter Washable, Anti-Mold
Compressor Rotary (Hermetic)
Refrigerant / Amount charged at shipment g R22 / 1870
Refrigerant control Capillary tube

Operation sound

Indoor – Hi / Me / Lo dB-A 48 / 44 / 39

Outdoor – Hi dB-A 51
Refrigerant tubing connections Flare type
Max. allowable tubing length at shipment m 10

Refrigerant tube

Narrow tube mm (in.) 6.35 (1/4)
diameter

Wide tube mm (in.) 12.7 (1/2)
Refrigerant tube kit Optional

Indoor Unit Outdoor Unit

Unit dimensions Height mm 680 630

Width mm 900 830

Depth mm 190 305
Package dimensions Height mm 813 713

Width mm 1,011 994

Depth mm 296 413

Weight Net

kg 23.5 59.0

Shipping

kg 30.0 64.0

Shipping volume m

3

0.24 0.29

Dimensions & Weight Features Electrical Rating Performance

Indoor Unit KPAV180R5VAA
Outdoor Unit GR180R5TAA

4

5

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

Remarks: Rating conditions are:

Cooling: Indoor air temperature 27°C DB / 19°C WB

Outdoor air temperature 35°C DB / 24°C WB

Heating: Indoor air temperature 20°C DB

Outdoor air temperature 7°C DB / 6°C WB

Power Source 220 – 240 V ~ 50 Hz
Voltage rating V 230

Cooling Heating

Capacity

kW 6.10 7.45

BTU/h 20800 25400

Air circulation (High) m

3

/h 900
Moisture removal (High) Liters/h 2.6 —
Available voltage range V 198 to 264
Running amperes A 12 13.6
Power input W 2650 2970
Power factor % 96 95
C.O.P. W/W 2.3 2.5
Compressor locked rotor amperes A 70
Controls / Temperature control Microprocessor / I.C. thermostat
Control unit Wireless remote control unit
Timer ON / OFF 24-hours & Daily Program
Fan speeds Indoor / Outdoor 3 and Auto / Auto (Hi, Lo)

Airflow direction (Indoor)

Horizontal Manual

Vertical Auto
Air filter Washable, Anti-Mold
Compressor Rotary (Hermetic)
Refrigerant / Amount charged at shipment g R22 /2280
Refrigerant control Capillary tube

Operation sound

Indoor – Hi / Me / Lo dB-A 50 / 47 / 44

Outdoor – Hi dB-A 55
Refrigerant tubing connections Flare type
Max. allowable tubing length at shipment m 10

Refrigerant tube

Narrow tube mm (in.) 6.35 (1/4)
diameter

Wide tube mm (in.) 15.88 (5/8)
Refrigerant tube kit Optional

Indoor Unit Outdoor Unit

Unit dimensions Height mm 680 835

Width mm 900 850

Depth mm 190 305
Package dimensions Height mm 813 913

Width mm 1,011 1,000

Depth mm 296 400

Weight Net

kg 23.5 70.0

Shipping

kg 30.0 79.0

Shipping volume m

3

0.24 0.37

Dimensions & Weight Features Electrical Rating Performance

Indoor Unit KPAV220R5VAA
Outdoor Unit GR220R5TAA

6

2-2. Major Component Specifications

2-2-1. Indoor Unit

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

Part No. POW–K181GJH
Controls Microprocessor
Control circuit fuse 250 V – 3.15 A

Remote Control Unit RCS–8HPS3E

Type Cross-flow
Q´ty ... Dia. and length mm 1 ... ø88 / L746
Fan motor model ... Q´ty UF2– 31A5PA–S ... 1
No. of poles ...Cool / Heat rpm (High) 2 ... 1,305 / 1,335
Nominal output W 30
Coil resistance (Ambient temp. 20°C) Ω WHT – BRN :130.4

WHT – PNK : 169.8

– : –
– : –
– : –

Safety

Type Thermal protector

devices Operating temp. Open °C 130 ± 8

Close Automatic reclosing

Run capacitor µF 2.0

VAC 440
Type Stepping motor
Model MP24GA2
Rating DC 12 V
Coil resistance (Ambient temp. 20°C) Ω Each terminals (1–2, 1–3, 1–4, 1–5) 400 : ± 7%
Coil Aluminum plate fin / Copper tube
Rows 2
Fin pitch mm 1.3
Face area m2 0.250

Heat

Exch. Coil

Flap Motor Fan & Fan Motor

Controller

PCB

Indoor Unit MCAV180R5VAA

7

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

Part No. POW–K241GJH
Controls Microprocessor
Control circuit fuse 250 V – 3.15 A

Remote Control Unit RCS–8HPS3E

Type Cross-flow
Q´ty ... Dia. and length mm 1 ... ø88 / L746
Fan motor model ... Q´ty UF2– 31A5PA–S ... 1
No. of poles ...Cool / Heat rpm (High) 2 ... 1,410 / 1,425
Nominal output W 30
Coil resistance (Ambient temp. 20°C) Ω WHT – BRN :130.4

WHT – PNK : 169.8

– : –
– : –
– : –

Safety

Type Thermal protector

devices Operating temp. Open °C 130 ± 8

Close Automatic reclosing

Run capacitor µF 2.0

VAC 440
Type Stepping motor
Model MP24GA2
Rating DC 12 V
Coil resistance (Ambient temp. 20°C) Ω Each terminals (1–2, 1–3, 1–4, 1–5) 400 : ± 7%
Coil Aluminum plate fin / Copper tube
Rows 2
Fin pitch mm 1.3
Face area m2 0.250

Heat

Exch. Coil

Flap Motor Fan & Fan Motor

Circuit

Board

Ass´y

Indoor Unit MCAV220R5VAA

8

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

Part No. POW–K186GHS–(C)
Controls Microprocessor
Control circuit fuse 250 V – 3 A

Remote Control Unit RCS–6HPS3E

Type Centrifugal
Number ... Dia. and length mm 2 ... ø 130 / L 180
Fan motor model ... Number K48410–M01597 ... 1
No. of poles ... rpm (230 V, High) 4 ... 1,140
Nominal output W 27
Coil resistance (Ambient temp. 20°C) Ω GRY – WHT : 194 - 223

WHT – VLT : 80.1 - 92.2
VLT – ORG : 80.1 - 92.2
ORG – YEL : 200 - 230

WHT – PNK : 238 - 274

Safety

Type Internal protector

devices Operating temp. Open °C 145 ± 5

Close Automatic reclosing

Run capacitor µF 2.0

VAC 440
Model M2LJ24ZE31
Rating AC 208 / 230 V, 50 / 60 Hz
No. of poles ... rpm 8 ... 2.5 / 3.0
Nominal output W 3 / 2.5
Coil resistance (Ambient temp. 20°C) kΩ 16.45 ± 15%
Coil Aluminum plate fin / Copper tube
Rows 2
Fin pitch mm 1.8
Face area m

2

0.192

Heat

Exch. Coil

Flap Motor

Fan & Fan Motor

Controller

PCB

Indoor Unit KPAV180R5VAA

9

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

Part No. POW–K186GHS–(C)
Controls Microprocessor
Control circuit fuse 250 V – 3 A

Remote Control Unit RCS–6HPS3E

Type Centrifugal
Number ... Dia. and length mm 2 ... ø 130 / L 180
Fan motor model ... Number K48410–M01598 ... 1
No. of poles ... rpm (230 V, High) 4 ... 1,280
Nominal output W 41
Coil resistance (Ambient temp. 20°C) Ω GRY – WHT : 124 - 144

WHT – VLT : 69.3 - 79.8
VLT – ORG : 69.3 - 79.8
ORG – YEL : 200 - 233

WHT – PNK : 255 - 294

Safety

Type Internal protector

devices Operating temp. Open °C 145 ± 5

Close Automatic reclosing

Run capacitor µF 2.0

VAC 440
Model M2LJ24ZE31
Rating AC 208 / 230 V, 50 / 60 Hz
No. of poles ... rpm 8 ... 2.5 / 3.0
Nominal output W 3 / 2.5
Coil resistance (Ambient temp. 20°C) kΩ 16.45 ± 15%
Coil Aluminum plate fin / Copper tube
Rows 2
Fin pitch mm 1.8
Face area m

2

0.192

Heat

Exch. Coil

Flap Motor

Fan & Fan Motor

Controller

PCB

Indoor Unit KPAV220R5VAA

10

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

Controller PCB POW–C186GH

Type Rotary (Hermetic)
Compressor model PH36VTRT
Nominal output W 1600
Compressor oil ... Amount cc DIAMOND MS32(N1)...900
Coil resistance (Ambient temp. 20°C) Ω C – R : 1.06

C – S : 2.03

Type Internal protector External protector (OLR)

Safety

Overload relay MRA38075-3158

devices Operating temp. Open °C Automatic opening 155 ± 5

Close °C Automatic reclosing 90 ± 10

Operating amp.(Ambient temp. 25°C) — Trip in 3 to 10 sec. at 54 A

Run capacitor µF 55.0

VAC 450
Crank case heater 240V 30W
Type Propeller
Number ... Dia. mm 1 ... ø 400
Fan motor model ... Number Smen 19FTB6055 ... 1
No. of poles ... rpm (230 V, High) 6 ... 914
Nominal output W 50

Coil resistance (Ambient temp. 20°C) Ω WHT – BRN : 77.7 ± 7%

WHT – YEL : 366.0 ± 7%

WHT – PNK : 211 ± 7%

Safety

Type Thermal protector

devices Operating temp. Open °C 130 ± 5

Close Automatic reclosing

Run capacitor µF 2.0

VAC 440
Coil Aluminum plate fin / Copper tube
Rows 2
Fin pitch mm 1.6
Face area m

2

0.487

External Finish Acrylic baked-on enamel finish

Heat

Exch. Coil

CompressorFan & Fan Motor

Outdoor Unit GR180R5TAA

11

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

Controller PCB POW–C226GH

Type Rotary (Hermetic)
Compressor model C–R221H5S 80687145B
Nominal output W 2,200
Compressor oil ... Amount cc 4GSD–T or SAY-56T ... 1,350
Coil resistance (Ambient temp. 25°C) Ω C – R : 0.78

C – S : 2.41

Type Internal protector External protector (OLR)

Safety

Overload relay — OL–D24

devices Operating temp. Open °C Automatic opening 150 ± 5

Close °C Automatic reclosing 63 ± 11

Operating amp.(Ambient temp. 25°C) — Trip in 6 to 16 sec. at 59 A

Run capacitor µF 40.0

VAC 450
Crank case heater 240V 30W
Type Propeller
Number ... Dia. mm 1 ... ø 460
Fan motor model ... Number Smen 19TFB6064 ... 1
No. of poles ... rpm (230 V, High) 6 ... 836
Nominal output W 50

Coil resistance (Ambient temp. 20°C) Ω WHT – BRN : 99.5 ± 7%

WHT – YEL : 252.0 ± 7%

WHT – PNK : 63.2 ± 7%

Safety

Type Thermal protector

devices Operating temp. Open °C 130 ± 5

Close Automatic reclosing

Run capacitor µF 5.0

VAC 440
Coil Aluminum plate fin / Copper tube
Rows 2
Fin pitch mm 2.0
Face area m

2

0.610

External Finish Acrylic baked-on enamel finish

Heat

Exch. Coil

CompressorFan & Fan Motor

Outdoor Unit GR220R5TAA

2-3. Other Component Specifications

12

Thermistor (Room sensor) DTN-TKS142B

Resistance kΩ 25°C 5.0 ± 3%

Thermistor (Coil sensor) DTN-TKS131B

Resistance kΩ 0°C 15.0 ± 2%

Transformer (TR) ATR-J105

RatingPrimary AC 230V, 50Hz

Secondary 19V, 0.526A
Capacity 10VA

Coil resistance Ω (at 21°C) Primary (WHT – WHT): 205 ± 10%

Secondary (BRN – BRN): 2.0 ± 10%

Thermal cut-off temp. 150°C

Indoor Unit MCAV180R5VAA

MCAV220R5VAA

Indoor Unit KPAV180R5VAA KPAV220R5VAA

Thermistor (Room sensor TH2) KTEC-35-S6

Resistance kΩ 10°C 10.0 ± 4% 30°C 4.0 ± 4%

15°C 7.9 ± 4% 35°C 3.3 ± 4%
20°C 6.3 ± 4% 40°C 2.7 ± 4%
25°C 5.0 ± 4% 50°C 1.8 ± 4%

Thermistor (Coil sensor TH1) PBC-41E-S14

Resistance kΩ –20°C 40.1 ± 5% 20°C 6.5 ± 5%

–10°C 24.4 ± 5% 30°C 4.4 ± 5%

0°C 15.3 ± 5% 40°C 3.0 ± 5%

10°C 9.9 ± 5% 50°C 2.1 ± 5%

Transformer (TR) ATR-J105

Rating Primary AC 230V, 50Hz

Secondary 19V, 0.526A
Capacity 10VA

Coil resistance Ω (at 21°C) Primary (WHT – WHT): 205 ± 10%

Secondary (BRN – BRN): 2.0 ± 10%

Thermal cut-off temp. 150°C

Coil rating AC 220-240V, 50Hz, 6W
Coil resistance Ω (at 20°C) 1.740 ±7%

Thermostat (Fan Speed Control 23S) MQT5S-27YZJ

Switching temp. °C

high ➞LOW23.5°C ±1.5
low ➞ HIGH 27.0°C

+0
–3

Contact rating AC 220V, 3A

Thermostat (Defrost thermo. 23D) TRS02-12MSR

Operating temp. °C ON12 ±2

Diff. 8 deg. below

Starting Relay (SR) AMVL300A

Coil rating AC 300V, 50Hz
Coil resistancekΩ(at 23°C) 13.3 ± 2%
Contact rating 20A AC
Operating voltage AC 185 – 217V, 50Hz
Return voltage AC 60 – 120V, 50Hz

Power Relay (PR) DFU24D1-F

Coil rating DC 24V
Coil resistance Ω (at 20°C) 650 ± 10%
Contact rating AC 250V, 20A

Outdoor Unit GR180R5TAA

4-way Valve (20S) LB64012 (Coil), V26-110B (Valve)

Coil rating AC 220-240V, 50Hz, 6W
Coil resistanceΩ(at 20°C)

1.740 ±7%

Starting Capacitor C4; C5

Capacitor 125 µF - 165V
Resistor

18KΩ - 2W

13

14

4-way Valve (20S) LB64012 (Coil), V26-110B (Valve)

Coil rating AC 220-240V, 50Hz, 6W
Coil resistance Ω (at 20°C) 1.640 ±7%

Thermostat (Fan Speed Control 23S) YTB-S383

Switching temp. °C

high ➞ LOW 28.5°C ± 1
low ➞ HIGH 31°C ± 1

Thermostat (Defrost thermo. 23D) TRS02-12MSR316

Operating temp. °C ON 12 ± 2

Diff. 8 deg. below

Magnetic Contactor (MG) HE-20FT31B

Coil rating AC 220/240 V,50Hz
Coil resistanceΩ(at 25°C) 1.050 ±15%
Contact rating (Main) AC 220V, 20A

Outdoor Unit GR220R5TAA

15

3. DIMENSIONAL DATA

Indoor Unit MCAV180R5VAA

28545

995

45

147.5 147.5

206 (3)

Remote control unit

Center of tubing
hole (2 places)

Narrow tube ø6.35 (1/4")

Drain hose ø18

Wide tube ø12.7 (1/2") MCAV180
Wide tube ø15.88 (5/8") MCAV220

61

18.5

172.5

Unit : mm

MCAV220R5VAA

Indoor Unit KPAV180R5VAA KPAV220R5VAA

Remote control unit

86

74 74

Center of tubing hole
ø75 (4 places)

Wide tube ø12.7 (1/2")

Narrow tube ø6.35 (1/4")

Drain hose ø26

74 74

61 18.5

900

86

41

41

190

680

Wide tube ø15.88 (5/8")

KPAV180
KPAV220

172.5

Dimensions : mm

16

17

Outdoor Unit GR180R5TAA

Air discharge

Air intake

538 146

307

337

4 – ø12 holes

830

19

630

305

61
95

Wide tube service valve
ø12.7 (1/2")

Narrow tube service valve
ø6.35 (1/4")

Unit : mm

18

Outdoor Unit : GR220R5TAA

Wide tube service valve ø15.88 (5/8")

Narrow tube service valve ø6.35 (1/4")

86
88

155

57

7386

229

285

835

620130 100

20

20

325

850

250250

560

6 – ø3.1 holes

Air intake

Air discharge

Unit : mm

4. REFRIGERANT FLOW DIAGRAM

Indoor Unit MCAV180R5VAA -KPAV180R5VAA Outdoor Unit GR180R5TAA

19

20

Insulation of Refrigerant Tubing

Because capillary tubing is used in the outdoor unit, both the
wide and narrow tubes of this air conditioner become cold. To
prevent heat loss and wet floors due to dripping of
condensation, both tubes must be well insulated with a
proper insulation material. The thickness of the insulation
should be a min. 8 mm.

After a tube has been insulated,
never try to bend it into a narrow
curve because it can cause the tube
to break or crack.

IMPORTANT

CAUTION

Wide tube

Thickness:
Min. 8 mm

Insulation

Narrow tube

Thickness:
Min. 8 mm

Indoor Unit MCAV220R5VAA - KPAV220R5VAA Outdoor Unit GR220R5TAA

Compressor

4-way
valve

Accumulator

Wide tube
service
valve

Wide tube

O.D.
ø15.88 mm
(5/8 ")

Narrow
tube
service
valve

Narrow tube

O.D.
ø6.35 mm
(1/4")

Heat exchanger

Heat exchanger

Capillary tube

Check
valve

Cooling cycle

Heating cycle

Indoor unit Outdoor unit

Strainer

Strainer

Capillary for
liquid injection

Capillary tube

Accumulator

5. PERFORMANCE DATA

5-1. Performance charts

Indoor Unit MCAV180R5VAA KPAV180R5VAA

Outdoor Unit GR180R5TAA

Indoor inlet air

D.B. temp. (°C)

Outdoor
fan speed

HighLow

1.38 (13)

1.28 (12)

1.18 (11)

1.08 (10)

0.98 ( 9 )

0.89 ( 8 )

0.79 ( 7 )

0.69 ( 6 )

25 30 35 40 45 50

Outdoor inlet air D.B. temp. (°C)

Low pressure at wide tube serveice valve MPa (kgf/cm

2

G)

0.59 ( 5 )

0.49 ( 4 )

0.39 ( 3 )

■ Cooling Characteristics ■ Heating Characteristics

Indoor inlet air

D.B. temp. (°C)

3.44 (34)

3.24 (32)

2.95 (30)

2.85 (28)

2.65 (26)

2.46 (24)

2.26 (22)

2.06 (20)

–5 0 5 10 15 20

Outdoor inlet air D.B. temp. (°C)

High pressure at wide tube serveice valve MPa (kgf/cm

2

G)

1.87 (18)

1.67 (16)

1.47 (14)
25

Indoor inlet air

D.B. temp. (°C)

14
13
12
11
10

9
8
7
6

25 30 35 40 45 50

Outdoor inlet air D.B. temp. (°C)

Operating current (A)

15

Indoor inlet air

D.B. temp. (°C)

Outdoor
fan speed

HighLow

13
12
11
10

9
8
7
6

–5 0 5 10 15 20

Outdoor inlet air D.B. temp. (°C)

Operating current (A)

25

14

15

32
27
21

27
20
16

27
20
16

32
27
21

Overload prevention operates to protect the air conditioner when outdoor ambient temperature reaches extremely
high in heating mode. (Refer to “8-5 Overload prevention”)

● ...... Points of Rating condition

Black dots in above charts indicate the following rating conditions.

Cooling: Indoor air temperature 27°C D.B./19°C W.B. Heating: Indoor air temperature 20°C D.B.

Outdoor air temperature 35°C D.B./24°C W.B. Outdoor air temperature 7°C D.B./6°C W.B.

NOTE

21

Indoor Unit MCAV220R5VAA KPAV220R5VAA
Outdoor Unit GR220R5TAA

22

Indoor inlet air

D.B. temp. (°C)

Outdoor
fan speed

HighLow

1.38 (13)

1.28 (12)

1.18 (11)

1.08 (10)

0.98 ( 9 )

0.89 ( 8 )

0.79 ( 7 )

0.69 ( 6 )

25 30 35 40 45 50

Outdoor inlet air D.B. temp. (°C)

Low pressure at wide tube serveice valve MPa (kgf/cm

2

G)

0.59 ( 5 )

0.49 ( 4 )

0.39 ( 3 )

■ Cooling Characteristics ■ Heating Characteristics

27
20

16

Indoor inlet air

D.B. temp. (°C)

3.44 (34)

3.24 (32)

2.95 (30)

2.85 (28)

2.65 (26)

2.46 (24)

2.26 (22)

2.06 (20)

–5 0 5 10 15 20

Outdoor inlet air D.B. temp. (°C)

High pressure at wide tube serveice valve MPa (kgf/cm

2

G)

1.87 (18)

1.67 (16)

1.47 (14)
25

Indoor inlet air

D.B. temp. (°C)

16
15
14
13
12
11
10

9
8

25 30 35 40 45 50

Outdoor inlet air D.B. temp. (°C)

Operating current (A)

17

Indoor inlet air

D.B. temp. (°C)

Outdoor
fan speed

HighLow

27
20
16

15
14
13
12
11
10

9
8

–5 0 5 10 15 20

Outdoor inlet air D.B. temp. (°C)

Operating current (A)

25

16

17

32
27
21

32
27
21

Overload prevention operates to protect the air conditioner when outdoor ambient temperature reaches extremely
high in heating mode. (Refer to “8-5 Overload prevention”)

● ...... Points of Rating condition

Black dots in above charts indicate the following rating conditions.

Cooling: Indoor air temperature 27°C D.B./19°C W.B. Heating: Indoor air temperature 21°C D.B.

Outdoor air temperature 35°C D.B./24°C W.B. Outdoor air temperature 7°C D.B./6°C W.B.

NOTE

5-2. Air Throw Distance Chart

Horizontal distance (m)

Axis air velocity (m/s)

Vertical distance (m)

Room air temp. : 20°C
Fan speed : High

Heating

Horizontal distance (m)

Axis air velocity (m/s)

Vertical distance (m)

Room air temp. : 27°C
Fan speed : High

Cooling

0

1

2

3

4

0 1 2 3 4 5 6 7 8 9

: Flap angle 0° , : Axis air velocity 0°
: Flap angle 30°, : Axis air velocity 30°

0

1

2

3

4

0 1 2 3 4 5 6 7 8 9

: Flap angle 45° , : Axis air velocity 45°
: Flap angle 60° , : Axis air velocity 60°

23

Indoor Unit MCAV180R5VAA

Horizontal distance (m)

Axis air velocity (m/s)

Vertical distance (m)

Room air temp. : 20°C
Fan speed : High

Heating

Horizontal distance (m)

Axis air velocity (m/s)

Vertical distance (m)

Room air temp. : 27°C
Fan speed : High

Cooling

0

1

2

3

4

0 1 2 3 4 5 6 7 8 9

: Flap angle 0° , : Axis air velocity 0°
: Flap angle 30°, : Axis air velocity 30°

0

1

2

3

4

0 1 2 3 4 5 6 7 8 9

: Flap angle 45° , : Axis air velocity 45°
: Flap angle 60° , : Axis air velocity 60°

24

Indoor Unit MCAV220R5VAA

25

Indoor Unit KPAV180R5VAA

01234567

3

2

1

0

Horizontal distance (m)

Axis air verocity (m/s)

Vertical distance (m)

Room air temp. : 27°C
Fan speed : High

Axis air verocity

Flap angle

60°

45°

Floor mounted

Cooling

01234567

3

2

1

0

Horizontal distance (m)

Axis air verocity (m/s)

Vertical distance (m)

Room air temp. : 20°C
Fan speed : High

Axis air verocity

Flap angle

Heating

0°

–20°

26

Room air temp. : 27°C
Fan speed : High

Cooling

Room air temp. : 20°C
Fan speed : High

Heating

01234567

1

0

2

3

Horizontal distance (m)

Axis air verocity (m/s)

Vertical distance (m)

Axis air verocity

Flap angle

45°

30°

Ceiling mounted

01234567

1

0

2

3

Horizontal distance (m)

Axis air verocity (m/s)

Vertical distance (m)

Axis air verocity

Flap angle

60°

80°

Indoor Unit KPAV180R5VAA

27

Indoor Unit KPAV220R5VAA

01234567

3

2

1

0

Horizontal distance (m)

Axis air verocity (m/s)

Vertical distance (m)

Room air temp. : 27°C
Fan speed : High

Axis air verocity

Flap angle

60°

45°

Floor mounted

Cooling

01234567

3

2

1

0

Horizontal distance (m)

Axis air verocity (m/s)

Vertical distance (m)

Room air temp. : 20°C
Fan speed : High

Axis air verocity

Flap angle

Heating

0°

–20°

28

Room air temp. : 27°C
Fan speed : High

Cooling

Room air temp. : 20°C
Fan speed : High

Heating

01234567

1

0

2

3

Horizontal distance (m)

Axis air verocity (m/s)

Vertical distance (m)

Axis air verocity

Flap angle

45°

30°

Ceiling mounted

01234567

1

0

2

3

Horizontal distance (m)

Axis air verocity (m/s)

Vertical distance (m)

Axis air verocity

Flap angle

60°

80°

Indoor Unit KPAV220R5VAA

RATING CAPACITY 5 kW
AIR FLOW RATE 760 m³/h

EVAPORATOR CONDENSER
ENT.TEMP. °C OUTDOOR AMBIENT TEMP. °C

W.B. D.B. 25 30 35 40 43

TC 4.74 4.60 4.38 4.11 3.79

CM 1.73 1.84 1.98 2.18 2.37
21 SHC 3.25 3.18 3.08 2.95 2.79
23 SHC 3.68 3.61 3.50 3.37 3.22

15 25 SHC 4.10 4.02 3.91 3.78 3.63

27 SHC 4.54 4.45 4.34 4.11 3.79
29 SHC 4.74 4.60 4.38 4.11 3.79
31 SHC 4.74 4.60 4.38 4.11 3.79

TC 5.13 4.93 4.70 4.41 4.07

CM 1.77 1.90 2.04 2.24 2.43
21 SHC 2.84 2.76 2.65 2.52 2.36
23 SHC 3.27 3.17 3.07 2.93 2.78

17 25 SHC 3.70 3.60 3.49 3.36 3.20

27 SHC 4.13 4.01 3.90 3.77 3.62
29 SHC 4.56 4.43 4.33 4.20 4.03
31 SHC 4.99 4.85 4.70 4.41 4.07

TC 5.43 5.25 5.00 4.70 4.33

CM 1.86 1.96 2.10 2.30 2.50
21 SHC 2.38 2.30 2.20 2.07 1.91
23 SHC 2.80 2.73 2.62 2.49 2.34

19 25 SHC 3.21 3.14 3.03 2.91 2.75

27 SHC 3.62 3.57 3.46 3.33 3.17
29 SHC 4.02 3.98 3.87 3.75 3.59
31 SHC 4.45 4.40 4.29 4.16 4.01

TC 5.76 5.57 5.30 4.98 4.59

CM 1.90 2.01 2.16 2.37 2.57
23 SHC 2.35 2.27 2.16 2.03 1.88

21 25 SHC 2.75 2.68 2.59 2.46 2.30

27 SHC 3.17 3.11 3.00 2.88 2.72
29 SHC 3.57 3.52 3.42 3.29 3.14
31 SHC 3.99 3.95 3.84 3.72 3.57

TC 6.15 5.89 5.57 5.21 4.85

CM 1.93 2.06 2.22 2.42 2.64

23 25 SHC 2.31 2.21 2.09 1.96 1.83

27 SHC 2.70 2.62 2.50 2.37 2.24
29 SHC 3.11 3.04 2.92 2.79 2.66
31 SHC 3.55 3.47 3.34 3.21 3.09

TC: TOTAL COOLING CAPACITY kW
SHC: SENSIBLE HEAT CAPACITY kW
CM: COMPRESSOR INPUT kW
RATING CONDITIONS

OUTDOOR AMBIENT TEMPERATURE 35°C D.B.
INDOOR UNIT ENTERING AIR TEMP. 27°C D.B./19°C W.B.

29

5-3. Cooling Capacity

Indoor Unit MCAV180R5VAA
Outdoor Unit GR180R5TAA

RATING CAPACITY 6.1 kW
AIR FLOW RATE 830 m³/h

EVAPORATOR CONDENSER
ENT.TEMP. °C OUTDOOR AMBIENT TEMP. °C

W.B. D.B. 25 30 35 40 43

TC 5.78 5.61 5.34 5.01 4.63

CM 2.18 2.33 2.50 2.75 2.99
21 SHC 3.96 3.89 3.75 3.59 3.41
23 SHC 4.49 4.40 4.27 4.11 3.93

15 25 SHC 5.01 4.91 4.77 4.61 4.43

27 SHC 5.53 5.42 5.29 5.01 4.63
29 SHC 5.78 5.61 5.34 5.01 4.63
31 SHC 5.78 5.61 5.34 5.01 4.63

TC 6.26 6.02 5.73 5.38 4.96

CM 2.23 2.39 2.57 2.83 3.07
21 SHC 3.47 3.37 3.24 3.08 2.88
23 SHC 3.99 3.87 3.74 3.58 3.39

17 25 SHC 4.52 4.39 4.26 4.10 3.90

27 SHC 5.04 4.89 4.76 4.60 4.42
29 SHC 5.57 5.41 5.28 5.12 4.92
31 SHC 6.09 5.91 5.73 5.38 4.96

TC 6.63 6.41 6.10 5.73 5.28

CM 2.34 2.47 2.65 2.91 3.15
21 SHC 2.90 2.81 2.68 2.52 2.33
23 SHC 3.41 3.33 3.20 3.04 2.85

19 25 SHC 3.91 3.83 3.70 3.55 3.36

27 SHC 4.42 4.35 4.22 4.06 3.87
29 SHC 4.91 4.85 4.72 4.58 4.38
31 SHC 5.42 5.37 5.24 5.08 4.89

TC 7.03 6.79 6.47 6.07 5.60

CM 2.39 2.54 2.73 2.99 3.25
23 SHC 2.87 2.77 2.64 2.48 2.29

21 25 SHC 3.36 3.28 3.16 3.00 2.81

27 SHC 3.87 3.79 3.66 3.51 3.32
29 SHC 4.36 4.30 4.18 4.02 3.83
31 SHC 4.87 4.81 4.68 4.54 4.35

TC 7.51 7.19 6.79 6.35 5.91

CM 2.44 2.60 2.80 3.05 3.33

23 25 SHC 2.81 2.69 2.55 2.39 2.23

27 SHC 3.29 3.20 3.05 2.89 2.73
29 SHC 3.79 3.71 3.57 3.41 3.25
31 SHC 4.33 4.23 4.07 3.91 3.77

TC: TOTAL COOLING CAPACITY kW
SHC: SENSIBLE HEAT CAPACITY kW
CM: COMPRESSOR INPUT kW
RATING CONDITIONS

OUTDOOR AMBIENT TEMPERATURE 35°C D.B.
INDOOR UNIT ENTERING AIR TEMP. 27°C D.B./19°C W.B.

Indoor Unit MCAV220R5VAA
Outdoor Unit GR220R5TAA

30

RATING CAPACITY 5 kW
AIR FLOW RATE 800 m³/h

EVAPORATOR CONDENSER
ENT.TEMP. °C OUTDOOR AMBIENT TEMP. °C

W.B. D.B. 25 30 35 40 43

TC 4.74 4.60 4.38 4.11 3.79

CM 1.73 1.84 1.98 2.18 2.37
21 SHC 3.25 3.18 3.08 2.95 2.79
23 SHC 3.68 3.61 3.50 3.37 3.22

15 25 SHC 4.10 4.02 3.91 3.78 3.63

27 SHC 4.54 4.45 4.34 4.11 3.79
29 SHC 4.74 4.60 4.38 4.11 3.79
31 SHC 4.74 4.60 4.38 4.11 3.79

TC 5.13 4.93 4.70 4.41 4.07

CM 1.77 1.90 2.04 2.24 2.43
21 SHC 2.84 2.76 2.65 2.52 2.36
23 SHC 3.27 3.17 3.07 2.93 2.78

17 25 SHC 3.70 3.60 3.49 3.36 3.20

27 SHC 4.13 4.01 3.90 3.77 3.62
29 SHC 4.56 4.43 4.33 4.20 4.03
31 SHC 4.99 4.85 4.70 4.41 4.07

TC 5.43 5.25 5.00 4.70 4.33

CM 1.86 1.96 2.10 2.30 2.50
21 SHC 2.38 2.30 2.20 2.07 1.91
23 SHC 2.80 2.73 2.62 2.49 2.34

19 25 SHC 3.21 3.14 3.03 2.91 2.75

27 SHC 3.62 3.57 3.46 3.33 3.17
29 SHC 4.02 3.98 3.87 3.75 3.59
31 SHC 4.45 4.40 4.29 4.16 4.01

TC 5.76 5.57 5.30 4.98 4.59

CM 1.90 2.01 2.16 2.37 2.57
23 SHC 2.35 2.27 2.16 2.03 1.88

21 25 SHC 2.75 2.68 2.59 2.46 2.30

27 SHC 3.17 3.11 3.00 2.88 2.72
29 SHC 3.57 3.52 3.42 3.29 3.14
31 SHC 3.99 3.95 3.84 3.72 3.57

TC 6.15 5.89 5.57 5.21 4.85

CM 1.93 2.06 2.22 2.42 2.64

23 25 SHC 2.31 2.21 2.09 1.96 1.83

27 SHC 2.70 2.62 2.50 2.37 2.24
29 SHC 3.11 3.04 2.92 2.79 2.66
31 SHC 3.55 3.47 3.34 3.21 3.09

TC: TOTAL COOLING CAPACITY kW
SHC: SENSIBLE HEAT CAPACITY kW
CM: COMPRESSOR INPUT kW
RATING CONDITIONS

OUTDOOR AMBIENT TEMPERATURE 35°C D.B.
INDOOR UNIT ENTERING AIR TEMP. 27°C D.B./19°C W.B.

Indoor Unit KPAV180R5VAA
Outdoor Unit GR180R5TAA

31

RATING CAPACITY 6.1 kW
AIR FLOW RATE 900 m³/h

EVAPORATOR CONDENSER
ENT.TEMP. °C OUTDOOR AMBIENT TEMP. °C

W.B. D.B. 25 30 35 40 43

TC 5.78 5.61 5.34 5.01 4.63

CM 2.18 2.33 2.50 2.75 2.99
21 SHC 3.96 3.89 3.75 3.59 3.41
23 SHC 4.49 4.40 4.27 4.11 3.93

15 25 SHC 5.01 4.91 4.77 4.61 4.43

27 SHC 5.53 5.42 5.29 5.01 4.63
29 SHC 5.78 5.61 5.34 5.01 4.63
31 SHC 5.78 5.61 5.34 5.01 4.63

TC 6.26 6.02 5.73 5.38 4.96

CM 2.23 2.39 2.57 2.83 3.07
21 SHC 3.47 3.37 3.24 3.08 2.88
23 SHC 3.99 3.87 3.74 3.58 3.39

17 25 SHC 4.52 4.39 4.26 4.10 3.90

27 SHC 5.04 4.89 4.76 4.60 4.42
29 SHC 5.57 5.41 5.28 5.12 4.92
31 SHC 6.09 5.91 5.73 5.38 4.96

TC 6.63 6.41 6.10 5.73 5.28

CM 2.34 2.47 2.65 2.91 3.15
21 SHC 2.90 2.81 2.68 2.52 2.33
23 SHC 3.41 3.33 3.20 3.04 2.85

19 25 SHC 3.91 3.83 3.70 3.55 3.36

27 SHC 4.42 4.35 4.22 4.06 3.87
29 SHC 4.91 4.85 4.72 4.58 4.38
31 SHC 5.42 5.37 5.24 5.08 4.89

TC 7.03 6.79 6.47 6.07 5.60

CM 2.39 2.54 2.73 2.99 3.25
23 SHC 2.87 2.77 2.64 2.48 2.29

21 25 SHC 3.36 3.28 3.16 3.00 2.81

27 SHC 3.87 3.79 3.66 3.51 3.32
29 SHC 4.36 4.30 4.18 4.02 3.83
31 SHC 4.87 4.81 4.68 4.54 4.35

TC 7.51 7.19 6.79 6.35 5.91

CM 2.44 2.60 2.80 3.05 3.33

23 25 SHC 2.81 2.69 2.55 2.39 2.23

27 SHC 3.29 3.20 3.05 2.89 2.73
29 SHC 3.79 3.71 3.57 3.41 3.25
31 SHC 4.33 4.23 4.07 3.91 3.77

TC: TOTAL COOLING CAPACITY kW
SHC: SENSIBLE HEAT CAPACITY kW
CM: COMPRESSOR INPUT kW
RATING CONDITIONS

OUTDOOR AMBIENT TEMPERATURE 35°C D.B.
INDOOR UNIT ENTERING AIR TEMP. 27°C D.B./19°C W.B.

Indoor Unit KPAV220R5VAA
Outdoor Unit GR220R5TAA

32

5-4. Heating Capacity

Indoor Unit MCAV180R5VAA MCAV220R5VAA KPAV180R5VAA KPAV220R5VAA
Outdoor Unit GR180R5TAA GR220R5TAA

–5 0 5

7

10 15

Outdoor temperature (°C D.B.)

0

10

20

30

40

50

60

70

80

90

100

110

120

Heating capacity ratio (%)

NOTE

1) … Point of Rating condition
Black dot in the chart indicate the following rating condition.

Indoor : 20°C D.B.
Outdoor : 7°C D.B. / 6°C W.B.

2) Above characteristics indicate instantaneous operation, which does not take into

account defrost operation.

3) Fan speed : High

4) Because this air conditioner heats a room by drawing in the heat of the outside

air (heat pump system), the heating efficiency will fall off when the outdoor
temperature is very low. If sufficient heat cannot be obtained with this air
conditioner, use another heating appliance in conjunction with it.

–8

33

34

6. ELECTRICAL DATA

6-1. Electrical Characteristics

Indoor Unit MCAV180R5VAA
Outdoor Unit GR180R5TAA

COOLING

Indoor Unit Outdoor Unit Complete Unit

Fan Motor Fan Motor Compressor
Performance at 230V Single phase 50Hz
Rating Conditions Running Amps. A 0.38 0.50 8.92 9.8

Power Input kW 0.072 0.093 1.935 2.10

Full Load Conditions Running Amps. A 0.38 0.50 11.12 12.0

Power Input kW 0.072 0.093 2.385 2.55

Rating Conditions : Indoor Air Temperature 27°C D.B. / 19°C W.B.

Outdoor Air Temperature 35°C D.B.

Full Load Conditions : Indoor Air Temperature 32°C D.B. / 23°C W.B.

Outdoor Air Temperature 46°C D.B.

HEATING

Indoor Unit Outdoor Unit Complete Unit

Fan Motor Fan Motor Compressor
Performance at 230V Single phase 50Hz
Rating Conditions Running Amps. A 0.38 0.50 9.42 10.3

Power Input kW 0.072 0.093 1.985 2.15

Full Load Conditions Running Amps. A 0.38 0.50 11.82 12.7

Power Input kW 0.072 0.093 2.565 2.73

Rating Conditions : Indoor Air Temperature 20°C D.B.

Outdoor Air Temperature 7°C D.B. / 6°C W.B.

Full Load Conditions : Indoor Air Temperature 27°C D.B.

Outdoor Air Temperature 24°CD.B. / 18°CW.B.

35

Indoor Unit MCAV220R5VAA
Outdoor Unit GR220R5TAA

COOLING

Indoor Unit Outdoor Unit Complete Unit

Fan Motor Fan Motor Compressor
Performance at 230V Single phase 50Hz
Rating Conditions Running Amps. A 0.40 0.55 11.05 12.0

Power Input kW 0.078 0.120 2.452 2.65

Full Load Conditions Running Amps. A 0.40 0.55 14.25 15.2

Power Input kW 0.078 0.120 3.202 3.40

Rating Conditions : Indoor Air Temperature 27°C D.B. / 19°C W.B.

Outdoor Air Temperature 35°C D.B.

Full Load Conditions : Indoor Air Temperature 32°C D.B. / 23°C W.B.

Outdoor Air Temperature 46°C D.B.

HEATING

Indoor Unit Outdoor Unit Complete Unit

Fan Motor Fan Motor Compressor
Performance at 230V Single phase 50Hz
Rating Conditions Running Amps. A 0.40 0.55 12.65 13.6

Power Input kW 0.078 0.120 2.772 2.97

Full Load Conditions Running Amps. A 0.40 0.55 16.75 17.7

Power Input kW 0.078 0.120 3.702 3.90

Rating Conditions : Indoor Air Temperature 20°C D.B.

Outdoor Air Temperature 7°C D.B. / 6°C W.B.

Full Load Conditions : Indoor Air Temperature 27°C D.B.

Outdoor Air Temperature 24°CD.B. / 18°CW.B.

36

Indoor Unit KPAV180R5VAA
Outdoor Unit GR180R5TAA

Rating Conditions: Indoor Air Temperature 27°C DB / 19°C WB

Outdoor Air Temperature 35°C DB

Full Load Conditions: Indoor Air Temperature 32°C DB / 23°C WB

Outdoor Air Temperature 43°C DB

Rating Conditions: Indoor Air Temperature 20°C DB

Outdoor Air Temperature 7°C DB / 6°C WB

Full Load Conditions: Indoor Air Temperature 27°C DB

Outdoor Air Temperature 24°C DB / 18°C WB

Indoor Unit Outdoor Unit

Complete Unit

Fan Motor Fan Motor Compressor

Performance at 230 V ~ 50Hz

Rating Conditions

Running Amps. A 0.33 0.40 9.57 10.30
Power Input kW 0.071 0.082 1.997 2.150

Full Load Conditions

Running Amps. A 0.33 0.40 11.83 12.56
Power Input kW 0.071 0.082 2.297 2.45

■

Cooling

■

Heating

Indoor Unit Outdoor Unit

Complete Unit

Fan Motor Fan Motor Compressor

Performance at 230 V ~ 50Hz

Rating Conditions

Running Amps. A 0.33 0.40
Power Input kW 0.071 0.082

Full Load Conditions

Running Amps. A 0.33 0.40
Power Input kW 0.071 0.082 2.397 2.55

400 V – 3N ~ 50Hz

400 V – 3N ~ 50Hz

9.07 9.8

1.947 2.10

11.27 12.0

37

Indoor Unit KPAV220R5VAA
Outdoor Unit GR220R5TAA

Indoor Unit Outdoor Unit

Complete Unit

Fan Motor Fan Motor Compressor

Performance at 230 V ~ 50Hz

Rating Conditions

Running Amps. A 0.40 0.54 3.96 4.5
Power Input kW 0.083 0.116 2.45 2.65

Full Load Conditions

Running Amps. A 0.40 0.54 4.56 5.5
Power Input kW 0.083 0.116 3.2 3.4

Rating Conditions: Indoor Air Temperature 27°C DB / 19°C WB

Outdoor Air Temperature 35°C DB

Full Load Conditions: Indoor Air Temperature 32°C DB / 23°C WB

Outdoor Air Temperature 43°C DB

Rating Conditions: Indoor Air Temperature 20°C DB

Outdoor Air Temperature 7°C DB / 6°C WB

Full Load Conditions: Indoor Air Temperature 27°C DB

Outdoor Air Temperature 24°C DB / 18°C WB

Indoor Unit Outdoor Unit

Complete Unit

Fan Motor Fan Motor Compressor

Performance at 230 V ~ 50Hz

Rating Conditions

Running Amps. A 0.40 0.54 3.86 4.80
Power Input kW 0.083 0.116 2.7 2.9

Full Load Conditions

Running Amps. A 0.40 0.54 4.76 5.7
Power Input kW 0.083 0.116 3.4 3.6

■

Cooling

■

Heating

400 V – 3N ~ 50Hz

400 V – 3N ~ 50Hz

Indoor Unit MCAV180R5VAA

6-2 Electric Wiring Diagrams

MCAV220R5VAA

WARNING

To avoid electrical shock hazard, be

sure to disconnect power before
checking, servicing and/or cleaning
any electrical parts

38

Indoor unit KPAV180R5VAA

To avoid electrical shock hazard, be sure to
disconnect power before checking, servicing
and/or cleaning any electrical parts.

WARNING

39

FCRG

KPAV220R5VAA

Outdoor Unit GR220R5TAA

40

Outdoor unit GR180R5TAA

41

42

7. INSTALLATION INSTRUCTIONS

7-1. Installation Site Selection

To prevent abnormal heat
generation and the possibility
of fire, don’t place obstacles,
enclosures and grills in front
of or surrounding the air
conditioner in a way that may
block air flow.

AVOID:

●

direct sunlight.

●

nearby heat sources that may affect performance of
the unit.

●

areas where leakage of flammable gas may be
expected.

●

places where large amounts of oil mist exist.

DO:

●

select an appropriate position from which every
corner of the room can be uniformly air-conditioned.
(High on a wall is best)

●

select a location that will hold the weight of the unit.

●

select a location where tubing and drain pipe have the
shortest run to the outside.

●

allow room for operation and maintenance as well as
unrestricted air flow around the unit. (Fig. 1)

●

install the unit within the maximum elevation
difference (H) above or below the outdoor unit and
within a total tubing length (L) from the outdoor unit as
detailed Table 1 and Fig. 2a.

Indoor Unit

,







15 cm

min.

15 cm
min.

15 cm min.

INDOOR UNIT

Front View

INDOOR
UNIT

Tubing length (L)

OUTDOOR
UNIT

Elevation
difference (H)

Fig. 2

Fig. 2a

Fig.1

WARNING

Table 1

* If total tubing length becomes 7.5 to 20 m (max.), charge additional refrigerant (R22) by 25 g/m.

No additional charge of compressor oil is necessary.

Model

Max. Allowable

Tubing Length at

Shipment (m)

Limit of Tubing

Length (L)

(m)

Limit of Elevation

Difference (H)

(m)

Required Amount of

Additional Refrigerant

(g/m)*

MCAV180R5VAA 20

Minimum height
from floor level

1.5m

Indoor Unit

Wall

Floor level

For stable operation of the
air conditioner, do not
install wall-mounted type
indoor units less than

1.5m from floor level.

CAUTION

Fig. 2b

7.5
7 25

MCAV220R5VAA 7.5 30

43

AVOID:

●

heat sources, exhaust fans, etc. (Fig. 3)

●

damp, humid or uneven locations.

DO:

●

choose a place as cool as possible.

●

choose a place that is well ventilated.

●

allow enough room around the unit for air
intake/exhaust and possible maintenance.
(Figs. 4a to 4c)

●

provide a solid base (concrete block, 10 ✕40 cm
beams or equal), a minimum of 10 cm above ground
level to reduce humidity and protect the unit against
possible water damage and decreased service life.
(Fig.5a and 5b)

●

use lug bolts or equal to bolt down unit, reducing
vibration and noise.

Outdoor Unit

Outdoor unit

Hot air

Heat source

Exhaust fan

Fig. 3

Air intake

Min. 10 cm

Air discharge

Min.

5 cm

Min.
40 cm

Valve
side
Min. 25 cm

Top View

Air intake

Concrete
or equal

About 10 cm

Min. 10 cm

Anchor bolts
(4 pcs.)

About 40 cm

Fig. 5 - A

2 m

2 m

Ground

Obstacle

Obstacle above

Air discharge

Side View

Fig. 4c

Required space around the unit.

Top View

Fig. 4a

Fig. 5a

Fig. 5 - B

Min. 10 cm

Anchor bolts
(4 pcs.)

Fig. 5b

Min. 10 cm

Air discharge

Min.

10 cm

Min.
50 cm

Valve
side
Min. 60 cm

Air intake

Top View

Fig. 4b

GR180 models

GR220 models

GR180,220 models

GR180 models

GR220 models

44

7-2. Remote Control Unit Installation

Position

The remote control unit can be operated from either a
non-fixed position or a wall-mounted position.

To ensure that the air conditioner operates correctly, do
not install the remote control unit in the following places:

●

In direct sunlight

●

Behind a curtain or other place where it is covered

●

More than 8 m away from the air conditioner

●

In the path of the air conditioner's airstream

●

Where it may become extremely hot or cold

●

Where it may be subject to electrical or magnetic
interference

Mounting on a Wall

a) Removable mounting

1) Momentarily hold the remote control unit at the
desired mounting position.

2) Confirm that the air conditioner responds
correctly when you press keys on the remote
control from that position.

3) After confirming correct operation, use a
screwdriver to screw the supplied special
mounting screw into the wall. (Fig.6a)

4) Hang the remote control unit from the mounting
screw.

b) Non-removable mounting

1) Momentarily hold the remote control unit at the
desired mounting position.

2) Confirm that the air conditioner responds
correctly when you press keys on the remote
control from that position.

3) After confirming correct operation, use a
screwdriver to screw the supplied special
mounting screw into the wall. (Fig.6a)

4) Remove the remote control cover by sliding it
downward.

5) Remove the batteries of the remote control unit.

6) Use a screwdriver to screw the remote control
unit securing screw into the wall through the hole
in the battery compartment. (Fig.6b)

7) Replace the batteries.

8) Again confirm that the remote control unit
operates correctly.

Wall

Special
mounting
screw

Screw

Wall

Fig.6b

Fig.6a

Removable mounting

Non-removable mounting

45

Regulations on wiring diameter differ from locality to
locality. For field wiring requirements, please refer to
your local electrical codes. Carefully observe these
regulations when carrying out the installation.

Table 2 lists recommended wire lengths and cross
section area for power supply systems.

Refer to the WIRING SYSTEM DIAGRAM for the
meaning of "A", "B" and "C" in Table 2.

NOTE

●

Be sure to comply with
local codes on running the
wire from the indoor unit to
the outdoor unit (size of
wire and wiring method,
etc.).

●

Each wire must be firmly
connected.

●

No wire should be allowed
to touch refrigerant tubing,
the compressor, or any
moving part.

To avoid the risk of electric
shock, each air conditioner
unit must be grounded.

●

Be sure to connect the
power supply line to the
outdoor unit as shown in
the wiring diagram. The
indoor unit draws its power
from the outdoor unit.

WARNING

WARNING

CAUTION

WIRING SYSTEM DIAGRAM

Power supply

220 – 240 V 50Hz

Ground

(A)

5

4

INDOOR

UNIT

OUTDOOR

UNIT

(C)

GRV180R5TAA

L
N

2

1

2

1

4
5
6
7

6
7

(B)

Power supply

220 – 240 V 50Hz

Ground

(A)

5

4

INDOOR

UNIT

OUTDOOR

UNIT

(C)

GRV220R5TAA

2

1

2

1

4
5
6
7

6

(B)

L
N

7

7-3. Recommended Wire Length and Size

Table 2

Cross-Sectional

Fuse or Circuit

Area (mm

2

)

2.5 2.5 1.0

Model

Breaker Capacity

GR180R5TAA

20

30

20 A22
20 A

GR220R5TAA

16

(A) Power Supply Wiring Length (m) (B) Power Line (C) Control Line

20
30

mm

2

mm

2

mm

2

46

8-1. Removing Air Intake Grille

(1) Hold both ends and pull forward to open the

air intake grille. (Fig. 1)

(2) Remove the metal clips connecting the unit and the

grille. First, with a screwdriver, loosen
the * marked screw a little at the right side clip
(DO NOT loosen it too much, otherwise, the screw
and small metal parts will fall off inside.), then press

on the stopper and pull off. (Fig. 2)
(3) Do the same procedure for the left metal clip.
(4) Unlatch the 2 tabs on the lower part of the grille to

take it off completely.

8. DISASSEMBLY PROCEDURE FOR INDOOR UNIT

IMPORTANT! Please Read Before Starting

Safety precautions for servicing the CEILING-MOUNTED indoor unit

Center latch

Air intake grille

Metal clip

*

Air intake
grille

Unit

For Floor Installation

Fig.1

Fig.2

●

Before attempting to replace heavy and bulky parts such as the evaporator and fan motor, disconnect the
indoor unit from the system and place it on the floor. Refer to the steps given below.

●

When checking or servicing the air intake grille, side panels, or electrical component box, first check that
power is completely disconnected. Pay utmost care that your working platform is stable enough. Also, do not
drop any replaced parts and tools on the floor.

47

8-2. Removing Side Panels

(1) Remove the 3 screws attaching the left side panel.

(Fig. 3)
(2) Note the position of the hook on the inside of the

left side panel. To disengage the hook from the slot,

slide down the panel for removal. (Fig. 3)
(3) Do the same procedure for the right side panel.

8-3. Access and Removal of

Electrical Component Box

(1) Remove the front screw with a screwdriver. (Fig. 4)
(2) Slide the lid out and up. (Fig. 4)
(3) Disconnect the wiring as necessary.
(4) Remove the 4 screws, then pull out the electrical

component box. (Fig. 5)

Side panel

Tapping screws
(4 × 10 mm)

Hook

Hook

Slot

Screw

Screw

Electrical component box

Screw

Connectors

Connectors

Hazardous voltage can cause ELECTRIC
SHOCK or DEATH. Disconnect the power
or turn off circuit breaker before you start
checking or servicing.

WARNING

Fig.3

Fig.4

Fig.5

48

8-4. Removing Flap Motor

(1) Remove the 3 screws used to mount the top panel.

(Fig. 6)
(2) While unlatching the 2 tabs inside the back of the

top panel, lift the top panel diagonally in the

direction of the arrow.(Fig. 6)
(3) Remove the 2 screws to pull off the flap motor.

The arm and cam come off together with the motor.

(Fig. 7)

8-5. Removing Evaporator
(=Indoor Heat Exchange Coil)

(1) Remove the 7 screws used to mount the blades.

(Fig. 8)
(2) Lift the blades in the direction of the arrow.(Fig. 8)

Top panel

Flap
motor

Screw

Blade

Arm

Cam

Screw

Flap motor

Screw

Blades

Fig.6

Fig.7

Fig.8

49

(3) Remove the 6 screws of the front panel and pull it

toward you. (Fig. 9)

(4) Remove the 2 screws used to mount the

evaporator. (Fig. 10)
(5) Remove the rubber cap to pull the thermistor out of

the evaporator. (Fig. 10)
(6) Cut the plastic clamp securing the drain hose to the

front fan casing. (Fig. 10)

(7) The evaporator is built into the drain pan. Pull out

the drain pan together with the evaporator in the

direction of the arrow. (Fig. 10)

The foamed polystyrene drain pan is fragile: DO
NOT apply excessive force when removing it.

(8) The evaporator can be removed by sliding it out

from the drain pan in the direction of the arrow.

(Fig. 11)

Front panel

Screw

Plastic clamp

Drain pan

Screw

Rubber cap

Thermistor

Drain hose

Front
fan casing

Drain pan

Evaporator
(Indoor coil)

Mounting
plate

Mounting
plate

Fig.9

Fig.10

Fig.11

IMPORTANT

50

8-6. Removing Fan and Fan Motor

(1) Unlatch the 2 hooks on each side to take off the

front fan casing. (Fig. 12)

(2) Remove the 2 screws attaching the rear fan casing

and then pull the fan casing out.

(3) Insert a hex wrench in the fan boss and turn it

counterclockwise to loosen the centrifugal fan.

The fan can be removed by sliding it to the left.

(Fig. 14)

(4) Remove the 4 bolts to remove the fan motor from

the frame. (Fig. 15)

Hook

Hook

Front fan casing

Rear fan casing

Hex wrench
(3mm or 7/64")

Centrifugal fan

Bolts (M6)

Fan motor

Frame

Fig.12

Fig.13

Fig.14

Fig.15

9. FUNCTION

9-1. Room Temperature Control

■

Cooling

●

Room temperature control is obtained by cycling the compressor ON and OFF under control of the room
temperature sensor in the remote control unit.

●

The room temperature (and other information) is transmitted every 3 minutes by the remote control unit to the
controller in the indoor unit.

●

The control circuit will not attempt to turn the compressor ON until the compressor has been OFF for at least
3 minutes. To protect the compressor from stalling out when trying to start against the high side refrigerant
pressure, the control circuit has a built-in automatic time delay to allow the internal pressure to equalize.

●

As a protective measure, the control circuit switches the compressor OFF after 5 minutes or more of compressor
operation.

●

Thermo. ON : When the room temperature is above T + 1°C (T°C is set temperature).

Compressor ➞ON

●

Thermo. OFF : When the room temperature is equal to or below set temperature T°C.

Compressor ➞OFF

3 minutes 3 minutes 3 minutes 3 minutes 3 minutes 3 minutes 3 minutes

3 minutes5 minutes

ON OFF ON OFF ON OFFCompressor

ON OFF ON OFF ON OFF

More than

5 minutes

Outdoor fan

Indoor fan

Set speed

T+1 °C

T °Cset temp.

Thermo.
OFF

Thermo.
OFF

Thermo.
ON

Thermo.
OFF

Thermo.
ON

Thermo.
ON

Thermo.
ON

Room temp.

Signal from remote control unit

51

■

Heating

●

Room temperature control is obtained by cycling the compressor ON and OFF under control of the room
temperature sensor in the remote control unit.

●

The room temperature (and other information) is transmitted every 3 minutes by the remote control unit to the
controller in the indoor unit.

●

The control circuit will not attempt to turn the compressor ON until the compressor has been OFF for at least 5
minutes. To protect the compressor from stalling out when trying to start against the high side refrigerant
pressure, the control circuit has a built-in automatic time delay to allow the internal pressure to equalize.

●

As a protective measure, the control circuit switches the compressor OFF after 5 minutes or more of compressor
operation.

●

Thermo. ON : When the room temperature is below T – 1°C (T°C is set temperature).

Compressor ➞ON

●

Thermo. OFF : When the room temperature is equal to or above set temperature T°C.

Compressor ➞OFF

*1: Refer to "8-6 Cold Draft Prevention".

NOTE

3 minutes 3 minutes 3 minutes 3 minutes 3 minutes 3 minutes

5 minutes 5 minutes

ON OFF ONOFFCompressor OFF

ON OFF ONOFFOutdoor fan OFF

Set speed

LL

LL

ON

OFF

OFF OFF ON OFF ON

*1

OFF

OFF

ON

ON ( Reversing cycle )

Thermo.ONThermo.

OFF

Thermo.
ON

Thermo.
OFF

More than

5 minutes

Signal from remote control unit

T °C

T–1°C

T–2 °C

set temp.

Indoor fan

Standby lamp

Indoor heat exch.
coil temp.

35 °C

Solenoid coil

(4–way valve)

Operation button

Room temp.

*1

Set speed

30 seconds30 seconds

52

9-2. Dry Operation (Dehumidification)

●

Dry operation uses the ability of the cooling cycle to remove moisture from the air, but by running at low level to
dehumidify without greatly reducing the room temperature. The air conditioner repeats the cycle of turning ON
and OFF automatically as shown in the chart below according to the room temperature.

● Intermittent ventilation occurs by switching the indoor fan speed between L ↔ LL.

● Dry operation does not occur when the room temperature is under 15°C, which is the monitor zone.

● When the compressor stops, the indoor fan stops as well.

9-3. Automatic Switching between Cooling and Heating

●

When AUTO mode is selected, the microprocessor calculates the difference between the set temperature and
the room temperature, and automatically switches to COOLING or HEATING mode to maintain the desired
temperature.

Room temp. ≥ Set temp. ➞ COOL
Room temp. < Set temp. ➞ HEAT

This means that if the room temperature is higher than or equal to the set temperature, COOLING operation
begins. If the room temperature is lower than the set temperature, HEATING operation begins.

NOTE

Room temp.

Cooling operation

T+2 °C

Set temp. T °C

T–1 °C

Monitor zone
Both the indoor and outdoor units stop.

Room temp. 15 °C

✻Dry A zone

Compressor :
FMI (indoor fan) :

Continuous operation
L (low speed) / LL (very low speed) intermittent ventilation

only while the compressor is ON.

✻Dry B zone

Compressor :
FMI (indoor fan) :

Intermittent operation (ON for 3 minutes and OFF for 9 minutes)
L (low speed) / LL (very low speed) intermittent ventilation

only while the compressor is ON.

53

9-4. Freeze Prevention (Cooling)

●

This function prevents freezing of the indoor heat exchange coil.

●

When the compressor has been running for 10 minutes or more and the temperature of the indoor heat
exchange coil falls below –1°C, the control circuit stops the compressor for at least 6 minutes. The compressor
does not start again until the temperature rises above 8°C or 6 minutes has elapsed.

9-5. Overload Prevention (Heating)

●

This function prevents overheating of the indoor heat exchange coil.

●

When the temperature of the indoor heat exchange coil rises above 59°C, and if the indoor fan is L (low speed),
then the fan speed changes from L (low speed) to M (medium speed).

●

When the temperature of the indoor heat exchange coil rises above 61°C, the outdoor fan stops.

ONON OFF

ON

H or M or L H ➞ H, M ➞ M, L ➞ M

61
59

52
49

Indoor heat
exch. coil
temp. °C

Outdoor fan

Indoor fan

Compressor

ON ON ON ON

OFFOFF

Set speed

More than

10 minutes

6 minutes

T+1 °C

Indoor heat exch.
coil temp.

–1 °C

Compressor

Indoor fan

Room temp.

Thermo. OFF

Thermo. ON

Set temp. T °C

More than

10 minutes

More than
6 minutes

Set speed

54

9-6. Cold draft Prevention (Heating)

●

This function controls indoor fan speed so a strong draft of cold air will not blow out before the indoor heat
exchange coil have sufficiently warmed up.

●

STANDBY lamp on front of the indoor unit lights up when this function is working.

●

when 10 minutes has elapsed,the fan speed is automatically switched to set speed regardless of indoor heat
exchange coil temperature.

OFF

ON

OFF or LL

Set speed

Indoor fan

Standby lamp

Indoor heat exch.
coil temp. (°C)

35

Max. 10minutes

55

9-7. Defrosting Operation (Heating)

■ Defrosting Flowchart

Compressor ON

Indoor heat exchanger coil
temperature drops 0.8°C per
6 minutes and it repeats
3 times in succession.

Integrated operating time of
compressor is more than 3
hours.

Defrosting begins.

Cold-draft prevention

Temperature of outdoor heat
exchange coil is higher than
12°C.

Release of defrosting

Indoor fan runs at set speed
when temperature of indoor
heat exchanger reads 35°C.

B

Defrosting time is over 12
minutes.

No LL fan operation during this period.

Compressor keeps running
for at least 6 minutes.

Temperature of outdoor heat
exchanger coil is below 9°C.

Integrated operating time of
compressor is more than 1.5
hours.

Thermo. OFF.
(Compressor OFF)

C D

Temperature of indoor heat
exchanger coil is below 45°C.

Continuous operating time of
compressor is more than 20
minutes.

Outdoor fan is either operated
or stopped for more than 10
minutes.

A

Is outdoor fan continuously
operating for more than 10
minutes?

Integrated operating time of
compressor is more than 50
minutes.

Temperature of indoor heat
exchanger coil is below 45 +
13°C.

Temp. of indoor heat exch.
coil immediately before thermo
goes off is either below 45 + 4°C
or 58 + 4°C (when overload
prevention works).

NO

NO

NO

YES

YES

YES

Overload

prevention works.

Does outdoor fan

stop?

Compressor keeps running for
at least 6 minutes.

Release of overload prevention
(Outdoor fan operates.)

Compressor keeps running for
at least 6 minutes.

NOTE

56

■ Defrosting Mode Timing Chart

*1: Refer to "8-6 Cold Draft Prevention".

NOTE

ON

ON

ON ON ON

ON

ONON

Set speed

OFF

OFF

OFF

OFF

32 seconds Max. 11 minutes 32 seconds

Start of defrosting

Release of defrosting

OFF

OFF

Release of

cold draft prevention

Compressor

Outdoor fan

Solenoid coil

(4–way valve)

Indoor fan

Standby lamp

Indoor heat
exch. coil
temp.

ONON

Set speed

* 1

2 seconds 2 seconds

35°C

57

58

9-8. Outdoor Fan Speed Control (Cooling and Dry Operation)

●

To optimize performance of the air conditioner, the outdoor fan speed is switched automatically according to the
outdoor temperature.

●

If the outdoor air temperature falls below A°C, the fan speed switches to LOW.

●

If the outdoor air temperature rises above B°C, the fan speed switches to HIGH.

●

This function does not become active in heating operation.

The operating temperature shown as A and B in the chart differ by models.

H H

L

B

A

Outdoor air
temperature (°C)

Outdoor fan
speed

NOTE

Models A B

GRV180R5TAA 23.5°C 27.0°C
GRV220R5TAA 28.5°C 31.0°C

10. TROUBLESHOOTING

10-1. Check before and after troubleshooting

10-1-1. Check power supply wiring.

●

Check that power supply wires are correctly connected to terminals L and N on the terminal plate in the outdoor
unit.

10-1-2. Check inter-unit wiring.

●

Check that inter-unit wiring is correctly connected to the indoor unit from the outdoor unit.

10-1-3. Check power supply.

●

Check that voltage is in specified range (±10% of the rating).

●

Check that power is being supplied.

10-1-4. Check lead wires and connectors in indoor and outdoor units.

●

Check that coating of lead wires is not damaged.

●

Check that lead wires and connectors are firmly connected.

●

Check that wiring is correct.

1
2

4
5
6
7

1
2

4
5
6
7

Indoor

unit

Outdoor

unit

Power supply :
220–240V~50Hz

Ground

Inter–unit
power wiring

1
2

4
5
6
7
L

1
2

4
5
6
7

Indoor

unit

Outdoor

unit

Ground

Ground

Ground

Inter–unit
power wiring

Inter–unit
control wiring

GRV180

MCAV180

N

1
2

4
5
6
7

Power supply :
220–240V~50Hz

L

N

Inter–unit
control wiring

GRV220MCAV220

59

WARNING

Hazardous voltage can cause ELECTRIC SHOCK or
DEATH. Disconnect power or turn off circuit breaker
before you start checking or servicing.

10-2. Air conditioner does not operate.

10-2-1. Circuit breaker trips (or fuse blows).

A. When the circuit breaker is set to ON, it is tripped soon. (Resetting is not possible.)

●

There is a possibility of ground fault.

●

Check insulation resistance.

If resistance value is 2MΩ or less, insulation is defective (“NO”).

Measure insulation
resistance of electrical
parts in outdoor unit.

NO

NO

Set circuit breaker to OFF.

*

Measure insulation
resistance of electrical
parts in indoor unit.

1

Remove both power supply wires
and inter-unit wires from terminal
plate in outdoor unit.

Measure insulation resistance
of outdoor unit.

•

2

Remove inter-unit wires from
terminal plate in indoor unit.

Measure insulation resistance
of indoor unit.

•

•

•

Insulation of
outdoor unit
is defective.

Insulation of
indoor unit
is defective.

WARNING

Indoor

unit

2

Outdoor

unit

11

Inter–unit
wiring

Power
supply
wiring

Power
supply

Ground

GRV180R5TAA
GRV220R5TAA

1 1
2 2

3
4 4
5 5
6 6
7 7

L
N

Circuit
breaker

60

B. Circuit breaker trips in several minutes after turning the air conditioner on.

●

There is a possibility of short circuit.

10-2-2. Neither indoor nor outdoor unit runs.

A. Power is not supplied.

B. Check "OPERATION selector" switch in the indoor unit.

YES

NO

•

OPERATION selector switch is set
in ON position.

Set OPERATION selector switch
to ON.

Switch Ass'y or indoor PCB Ass'y
is defective.

NO

•

Check power supply.
Power is being supplied to the

outdoor unit.

Circuit breaker
is tripped.

Power failure

Reset breaker.

Wait for recovery
or contact power
company.

Replace with suitable
one (larger capacity).

•

•

•

NO

Check capacity of circuit breaker.
Capacity of circuit breaker is

suitable.

Measure resistance of outdoor fan
motor winding.

Measure resistance of compressor
motor winding.

Measure coil resistance of magnetic
contactor. (MG)

•

Measure resistance of 4-way valve's
winding.

(GR220R5TAA)

In case of Heating operation :

61

C. Check remote control unit.

D. Check fuse on the indoor PCB Ass'y.

E. Check TIMER on the remote control unit.

•

Timer is turned ON. Check to see
if is displayed on remote
control.

YES

Cancel the timer mode.

ON

OK

OK

•

Check fuse on indoor PCB Ass'y
for continuity. (F)

•

Check operation lamp to see
if light is ON.

Light is OFF

•

Measure resistance of primary and
secondary winding of transformer.
(TR)

•

Indoor PCB Ass'y or switch Ass'y is
defective.

OK

OK

•

Measure resistance of indoor and
outdoor fan motor winding.
(FMI, FMO)

•

Measure resistance of flap motor
winding. (FLP)

OK

•

Measure resistance of either power
relay or magnetic contactor.
(PR or MG)

•

Replace the fuse.

If fuse has been blown,

OK

•

Try to run with another remote
control unit.

First remote control unit is defective.

•

Check for residue buildup on
transmitter of remote control unit.

•

Check for residue buildup on remote
control receiver on front of indoor
unit.

Clean transmitter.

Clean receiver.

62

10-2-3. Only outdoor unit does not run.

A. Check setting temperature.

B. Check PCB Ass'y in either indoor or outdoor unit.

10-2-4. Only indoor unit does not run.

•

Indoor PCB Ass'y is defective.

•

Indoor PCB Ass'y is defective.

•

Check voltage between terminals
No. 4(+) and No. 5 at terminal plate.
(DC 24V)

No voltage appears.

•

Outdoor PCB Ass'y is defective.

OK

OK

NO

Is room temperature too low ?

Try to lower setting temperature by
temperature setting button ( button).

Outdoor unit still does
not run.

Remote control unit is defective.

•

Try to run using another remote
control unit.

COOL

OK

NO

Is room temperature too high ?

Try to raise setting temperature by
temperature setting button ( button).

Outdoor unit still does
not run.

•

Try to run using another remote
control unit.

HEAT

Remote control unit is defective.

63

10-3. Some part of air conditioner does not operate.

10-3-1. Only indoor fan does not run.

10-3-2. Only flap motor does not run.

10-3-3. Function of outdoor fan speed control does not work properly.

•

Check thermostat in outdoor unit.
(23S)

Refer to "8-8 Outdoor Fan Speed Control".

•

Measure resistance of flap motor
winding.

Fan cannot
be turned.

OK

•

Check fan rotation.
Turn fan gently once or twice by
hand.

•

Check fan casing
foreign matter on
inside.

Fan motor burnout
or foreign matter in
bearings.

Remove foreign
matter or repair.

Repair or replace.

•

Measure resistance of indoor fan
motor winding.

•

Check fan motor capacitor. (C1)

64

10-3-4. Only outdoor fan does not run.

10-3-5. Only compressor does not run.

NO

YES

YES

YES

•

Measure coil resistance of
starting relay. (SR)

(GRV180R5TAA)

•

Measure resistance of
compressor motor winding.

•

Check capacitors.

(C3 or C4, C5)

•

Either overload relay or
internal protector is working.

(Either OLR or 49C)

YES

•

Temperature of compressor
is abnormally high.

Refrigerant gas shortage. Charge refrigerant gas (R22).

Rotor may be locked up.

•

Measure coil resistance of
power relay. (PR)

•

Measure coil resistance of the
magnetic contactor. (MG)

(GR220R5TAA)

(GR180R5TAA)

Fan cannot
be turned.

OK

•

Check fan rotation.
Turn fan gently once or twice by
hand.

•

Check fan casing
foreign matter on
inside.

Fan motor burnout
or foreign matter in
bearings.

Remove foreign
matter or repair.

Repair or replace.

•

Measure resistance of outdoor fan
motor winding.

•

Check fan motor capacitor. (C2)

65

10-4. Air conditioner operates, but abnormalities are observed.

10-4-1. Operation does not switch from HEAT to COOL (or COOL to HEAT).

•

Indoor PCB Ass'y is defective.

•

Check voltage between terminals
No. 4(+) and No. 6 at terminal plate.

(DC 24V)

No voltage appears.

Outdoor PCB Ass'y is defective.

OK

•

Remote control unit may be defective.

•

Measure resistance of 4–way valve's
winding. (20S)

Receiver in lamp Ass'y may be
defective.

COOl ➞ HEAT

•

Check voltage between terminals
No. 4(+) and No. 6 at terminal plate.

(0V)

HEAT ➞ COOL

66

10-4-2. Poor cooling or heating.

10-4-3. Excessive cooling or heating.

NO

NO

•

Set temperature is suitable.

Set temperature to higher or
lower value using temperature
setting buttons of the remote
control unit.

•

Remote control unit is placed where
it can detect room temperature
properly.

Change position of remote
control unit.

Air filter is clogged.

NO

YES

Temperature
difference
is small.

YES

Temperature difference between
suction and discharge air is
large enough (approx. 10 deg. or more).

Possibility of
gas shortage.

YES

•

Check position of remote control unit.
Cool or warm air from air conditioner
reaches position directly.

•

Change position of remote
control unit.

•

Wide and narrow tubes between
indoor unit and outdoor unit are
insulated.

Insulate both wide and narrow
tubes separately and then
tape together.

•

Measure temperature of suction and
discharge air of air conditioner.

Charge refrigerant
gas (R22).

Check for clogging of air filter.

•

Fan speed is set to LOW.

Clean filter.

Set fan speed to either
HIGH or MEDIUM.

•

Review cooling load estimate,
if performance of air conditioner is
normal.

Reduce cooling or heating
load or replace the air
conditioner with larger
capacity.

67

10-5. If a sensor is defective.

10-5-1. Indoor coil temp. thermistor (TH1) is defective.

Alarm Signal (*)

Operation lamp on the front side of the indoor unit will flash on and off when the indoor coil thermistor is defective.
At the same time the outdoor unit will stop. Indoor unit will operate only for ventilation.

10-5-2. Room temp. thermistor (TH2) is defective.

A. Open

When thermistor opens, the air conditioner will be in the following conditions as the
controller tries to detect extremely low room temperature.
a) In Cooling mode: The air conditioner soon stops and will not start again.

(Thermo.OFF) Neither outdoor fan nor compressor runs.

b) In Heating mode: The air conditioner continues to operate (Thermo.ON). Both

the outdoor fan and compressor do not stop. As a result, the
room becomes too warm.

B. Short

When thermistor is short, the air conditioner will be in the following conditions as
the controller tries to detect extremely high room temperature.
a) In Cooling mode: The air conditioner continues to operate (Thermo.ON). Both

the outdoor fan and compressor do not stop. As a result, the
room becomes too cold.

b) In Heating mode: The air conditioner soon stops and will not start again

(Thermo.OFF). Neither outdoor fan nor compressor runs.

Definition of Open or Short Circuit of Sensor (Thermistor)

Open ... A lead wire is broken or disconnected or the circuit inside the temperature sensor is open .
Short ... The protective cover of a lead wire has been damaged, and the exposed wire is touching another metal

part, or both lead wires have become exposed and are touching each other. Alternatively, the circuit
inside the temperature sensor is closed.

NOTE

NOTE

•

Operation lamp on front side of
indoor unit is flashing on and off. (*)

YES

•

Replace thermistor.

•

Thermistor (TH1 ) is defective.

YES

68

Temperature
sensor

Lead
wires

Thermistor Structure

69

11-1. Measurement of Insulation

Resistance

●

The insulation is in good condition if the resistance
exceeds 2MΩ.

11-1-1.Power Supply Wires

Clamp the ground wire of the power supply wires with
the lead clip of the insulation resistance tester and
measure the resistance by placing a probe on either of
the power wires. (Fig. 1)

Then measure the resistance between the ground wire
and the other power wire. (Fig. 1)

11-1-2.Indoor Unit

Clamp an aluminum plate fin or copper tube with the
lead clip of the insulation resistance tester and
measure the resistance by placing a probe on each
terminal screw on the terminal plate. (Fig. 2)
Note that the ground line terminal should be skipped
for the check.

11-1-3.Outdoor Unit

Clamp a metallic part of the unit with the lead clip of
the insulation resistance tester and measure the
resistance by placing a probe on each terminal screw
where power supply lines are connected on the
terminal plate. (Fig. 2)

11-1-4.Measurement of Insulation

Resistance for Electrical Parts

Disconnect the lead wires of the desired electric part
from terminal plate, capacitor, etc. Similarly disconnect
the connector. Then measure the insulation resistance.
(Figs. 3 and 4)

Refer to Electric Wiring Diagram.
If the probe cannot enter the poles because the hole is

too narrow then use a probe with a thinner pin.

NOTE

11. CHECKING ELECTRICAL COMPONENTS

Insulation
tester

Probe

Clip

Ground wire

Terminal plate

Copper
tube or
metallic part

Clip

Insulation
tester

Probe

Copper
tube or
metallic part

Clip

Insulation
tester

Probe

Clip

Insulation
tester

Probe

Metallic
part

From fan motor,
compressor and
other parts

Fig. 1

Fig. 2

Fig. 3

Fig. 4

70

11-2. Checking Continuity of Fuse

on PCB Ass'y

●

Remove the PCB Ass’y from the electrical
component box. Then pull out the fuse from the PCB
Ass’y. (Fig. 5)

●

Check for continuity using a multimeter as shown in
Fig. 6.

11-3. Checking Motor Capacitor

Remove the lead wires from the capacitor terminals,
and then place a probe on the capacitor terminals as
shown in Fig. 7. Observe the deflection of the pointer,
setting the resistance measuring range of the
multimeter to the maximum value.

The capacitor is “good” if the pointer bounces to a
great extent and then gradually returns to its original
position.

The range of deflection and deflection time differ
according to the capacity of the capacitor.

Fuse

PCB Ass’y

Fuse

Compressor motor
capacitor

Fan motor
capacitor

Multimeter

Fig. 5

Fig. 6

Fig. 7

S.A.C. - olgiate olona - printed in italy

R.D. 28 Reyrieux BP 131 - 01601 Trévoux CEDEX France

Tél. [phone] - Fax [phone]

R.C.S. Bourg-en-Bresse B 759 200 728