Friedrich MW09C1H, MW12C1H, MR09C1H, MR12C1H User Manual 2

2 0 11

SPLIT TYPE ROOM AIR CONDITIONER
WALL MOUNTED TYPE

Service and Parts Manual

Models

Indoor Unit

Outdoor Unit

MW09C1H

MR09C1H

MW12C1H

MR12C1H

1. Safety Precautions

...............................................................................................................

2. Specifications

...........................................................................................................................

3. Construction Views

4. Refrigerant System Diagram

.......................................................................................

5. Schematic Diagram

6. Function and Control

.......................................................................................................

.....................................................................................................

...........................................................................................................

7. Installation Manual

............................................................................................................

9. Removal Procedure

.......................................................................................................

10. Exploded Views and Parts List

.............................................................................

2.1 Unit Specifications...........................................................................................................

2.2 Operation Date

2.3Expanded capacity data tables for both cooling and heating

3.1 Indoor Unit

3.2 Outdoor Unit

5.1 Electrical Date

8. Troubleshooting

...................................................................................................................

.................................................................................................................

9.1 Precautions before Performing Inspection or Repair

....................................................

9.2 Confirmation

Summary and features

2.4 Operation Characteristic Curven

......................................

......................................................................................

..............................................................................................................

.......................................................................................................................

....................................................................................................................

..............................................................................................................

...............................................................................................................

2.5 Noise criteria curve tables for both models....................................................................

9.3 Judgement by Flashing LED of Indoor/Outdoor Unit

...........................................................

....................................................................................

..................................................................................................

Model and product code

.........................................................................................................

9.4 How to Check simply the main part

5.2 Electrical Wiring

5.3 Printed Circuit Board

.................................................................................................................

Table of Contents

3

4

5-7

8

8-11
12
13
14

15

16

16

16

17

18-21

18

18-19

20-21

22-35

36-43

44-72
44

44

44-51

52-62

2

73-78

79-85

Model and product code

Model and product code

Voltage range

Complete unit model

zM

M09CIH115V ~ 60H W09CIH MR09CIH

M12CH115V ~ 60H W12CIH MR12CIH

Indoor unit model

M

MzM

Outdoor unit model

3

Outdoor Unit

MR09CIH

MR012CIH

Summary and f eatures

Summary and features

Remote control windo w

YB1FAF

4

IMPORTANT SAFETY INFORMATION

Th e i n fo r m a t i o n c o n ta i ne d i n t hi s m an u a l is i n t en d ed f o r u se by a q u a li f i e d se r v i c e
technicia n who is familiar with the safety pro cedures required for inst allation and repair, and
who is equipped with the proper tools and tes t instruments required to servic e this product.

Installation or repairs made by unqualifi ed persons can result in subjecting the unqualifi ed person making
such repairs as well as the persons being served by the equipment to hazards resulting in injury or electrical
shock which can be serious or even fatal.

Safety warnings have been placed throughout this manual to alert you to potential hazards that may be
encountered. If you install or perform service on equipment, it is your responsibility to read and obey these
warnings to guard against any bodily injury or property damage which may result to you or others.

Your safety and the safety of others are very important.

We have provided many important safety messages in this manual and on your appliance. Always read, understand and obey
all safety messages.

This is a safety Alert symbol.

This symbol alerts you to potential hazards that can kill or hurt you and others.

All safety messages will follow the safety alert symbol with the word “WARNING” or “CAUTION”.
These words mean:

WARNING

CAUTION

All safety messages will tell you what the potential hazard is, tell you how to reduce the chance of injury, and tell you what will
happen if the instructions are not followed.

NOTICE

You can be killed or seriously injured if you do not follow instructions.

You can receive minor or moderate injury if you do not follow instructions.

A message to alert you of potential property damage will have the word “NOTICE”.
Potential property damage can occur if instructions are not followed.

PERSONAL INJURY OR DEATH HAZARDS

ELECTRICAL HAZARDS:

• Unplug and/or disconnect all electrical power to the unit before performing inspections, maintenance,
or service.

• Make sure to follow proper lockout/tag out procedures.

• Always work in the company of a qualifi ed assistant if possible.

• Capacitors, even when disconnected from the electrical power source, retain an electrical charge
potential capable of causing electric shock or electrocution.

• Handle, discharge, and test capacitors according to safe, established, standards, and approved
procedures.

• Extreme care, proper judgment, and safety procedures must be exercised if it becomes necessary
to test or troubleshoot equipment with the power on to the unit.

5

• Do not spray or pour water on the return air grille, discharge air grille, evaporator coil, control panel,
and sleeve on the room side of the air conditioning unit while cleaning.

• Electrical component malfunction caused by water could result in electric shock or other electrically
unsafe conditions when the power is restored and the unit is turned on, even after the exterior is dry.

• Never operate the A/C unit with wet hands.

• Use air conditioner on a single dedicated circuit within the specifi ed amperage rating.

• Use on a properly grounded outlet only.

• Do not remove ground prong of plug.

• Do not cut or modify the power supply cord.

• Do not use extension cords with the unit.

• Follow all safety precautions and use proper and adequate protective safety aids such as: gloves,
goggles, clothing, adequately insulated tools, and testing equipment etc.

• Failure to follow proper safety procedures and/or these warnings can result in serious injury or death.

REFRIGERATION SYSTEM REPAIR HAZARDS:

• Use approved standard refrigerant recovering procedures and equipment to relieve pressure before
opening system for repair.

• Do not allow liquid refrigerant to contact skin. Direct contact with liquid refrigerant can result in minor
to moderate injury.

• Be extremely careful when using an oxy-acetylene torch. Direct contact with the torch’s fl ame or hot
surfaces can cause serious burns.

• Make sure to protect personal and surrounding property with fi re proof materials.

• Have a fi re extinguisher at hand while using a torch.

• Provide adequate ventilation to vent off toxic fumes, and work with a qualifi ed assistant whenever
possible.

• Always use a pressure regulator when using dry nitrogen to test the sealed refrigeration system for
leaks, fl ushing etc.

• Make sure to follow all safety precautions and to use proper protective safety aids such as: gloves,
safety glasses, clothing etc.

• Failure to follow proper safety procedures and/or these warnings can result in serious injury or death.

MECHANICAL HAZARDS:

• Extreme care, proper judgment and all safety procedures must be followed when testing,
troubleshooting, handling, or working around unit with moving and/or rotating parts.

• Be careful when, handling and working around exposed edges and corners of the sleeve, chassis,
and other unit components especially the sharp fi ns of the indoor and outdoor coils.

• Use proper and adequate protective aids such as: gloves, clothing, safety glasses etc.

• Failure to follow proper safety procedures and/or these warnings can result in serious injury or death.

6

PROPERTY DAMAGE HAZARDS

FIRE DAMAGE HAZARDS:

• Read the Installation/Operation Manual for the air conditioning unit prior to operating.

• Use air conditioner on a single dedicated circuit within the specifi ed amperage rating.

• Connect to a properly grounded outlet only.

• Do not remove ground prong of plug.

• Do not cut or modify the power supply cord.

• Do not use extension cords with the unit.

• Be extremely careful when using acetylene torch and protect surrounding property.

• Failure to follow these instructions can result in fi re and minor to serious property damage.

WATER DAMAGE HAZARDS:

• Improper installation, maintenance or servicing of the air conditioner unit can result in water damage
to personal items or property.

• Insure that the unit has a suffi cient pitch to the outside to allow water to drain from the unit.

• Do not drill holes in the bottom of the drain pan or the underside of the unit.

• Failure to follow these instructions can result in damage to the unit and/or minor to serious property
damage.

7

2Specifications

Remarks:

Rating conditions are:

Cooling: Indoor air temperature 80¡F D.B. / 67¡ F W.B.

Outdoor air temperature 95.0¡F D.B. / 75¡F W.B.

Heating: Indoor air temperature 70¡F D.B./ 60¡ F W.B.

Outdoor air temperature 47¡F D.B. / 43¡F W.B.

2.1 Unit Specifications

09K of 115V Models Indoor MW09CIH

MW09CIH
COOLING

115V~

07zHhgiH
14zHdradnatS
51zHwoL

High W / Btu/h 3100/10600

Standard W / Btu/h 2650/9000

Low W / Btu/h 1300/4435

0501WhgiH
046WdradnatS
081WwoL

0501WhgiH
046WdradnatS

8.61AhgiH

0.7AdradnatS

SH

CFM

330

H

CFM

294

M

CFM

253

L

CFM

218

1.69pints/hour

14.0W/W
22

MW09CIH

0621nim/rHS

0501nim/rH
029nim/rM
037nim/rL

02W

0.4F

A

0.38

Cross flow fan

in. 3.62 X 25.4

Aluminum fin-copper tube

in.

in.

216

0.019 - 0.055in.

25.4 X 1 X 10.5

MP24AA

4.2W

A PCB 3.15A

43)A( BdH

03)A( BdM

62)A( BdL

44)A( BdH

04)A( BdM

63)A( BdL

33.3X10.8X11

36X10X14

16X24.3X130.9lbs

in.

in.

Power Input
(Inverter different Compressor
speed)

Model
Function
Rated Voltage
Frequency
(Inverter different Compressor
speed)

Total Capacity
(Inverter different Compressor
speed)

Sound Power Level

Fuse (A)

Fan

Evaporator

Swing
Motor

width (L)

Output

Type

Model

Net Weight /Gross Weight

Output
Capacitor
RLA

Diameter-Length

Pipe Diameter
Row-Fin Gap

Sound Pressure Level

Rated Input

Rated Current

Air Flow Volume

Fan Motor

Dehumidifying Volume
STD

Indoor unit

Speed

Specifi cations

Outdoor Unit MR09C1H

Turbo

Turbo

33 1/4 X 10 7/8 X 7 1/8

22

8

Rating

Remarks

conditions are:

Cooling: Indoor air temperature 26.7¡ C D.B. / 19.4¡C W. B.

Outdoor air temperature 35.0¡C D.B. / 23.9¡C W.B.

Heating: Indoor air temperature 21.1¡ C D.B./ 15.6¡ C W.B.

Outdoor air temperature 8.33¡C D.B. / 6.11¡C W.B.

MW12CIH

208-230V~

07zHhgiH
14zHdradnatS

51zHwoL
4100/14000
3520/12000
1320/4500

hgiH

dradnatS

W / Btu/h

W / Btu/h

W / Btu/h

woL

0501WhgiH

046WdradnatS

081WwoL

0501WhgiH

046WdradnatS

5.6AhgiH

2.3AdradnatS

SH

CFM
CFM

CFM

CFM

300

2H 77

2M 53

2L 18

2.54pints/hour
.12.00W/W

22

0621nim/rHS

0501nim/rH
029nim/rM
037nim/rL

02W

0.1F

A

0.2

Cross flow fan

in.

in.
in.

in.

3.62X25.4

25.4X1X10.5

.276

in.

33.3X10.3X7.1
in. 36X10X14
lbs .26.3/30.9

.077-.055

Aluminum fin-copper tube

MP24AA

4.2W

A PCB 3.15A

43)A( BdH

03)A( BdM

62)A( BdL

44)A( BdH

04)A( BdM

63)A( BdL

Rated Input

Rated Current

Air Flow Volume

Fan Motor

Dehumidifying Volume
EER / C.O.P

Indoor unit

Speed

SEER/HSPF

Net Weight /Gross W eight

Output
Capacitor
RLA

Diameter-Length

Pipe Diameter
Row-Fin Gap

Sound Pressure Level

Sound Power Level

Fuse (A)

Fan

Evaporator

Swing
Motor

width (L)

Output

Type

Model

Power Input
(Inverter different Compressor
speed)

Mo

12K of 115V Models

del
Function COOLING
Rated Voltage
Frequency
(Inverter different Compressor
speed)

Total Capacity
(Inverter different Compressor
speed)

Specifications

Outdoor Unit MR12CH - SYSTEM

Turbo

Turbo

33 1/4 X 10 7/8 X 7 1/8

115

22

9

The above data is subject to change without notice. Please refer to the nameplate of the unit.

MR09C1H

SANYO

C-6RZ110H1A

Twin rotory

33A)A( .A.R.L

95.4A)A(ALR

Power Input(W) W 800

Int11l-3979

Electronic Expansion Valve

throttling

Transducer starting

Aluminum fin-copper tube

Pipe Diameter mm .275

2 - .005

Rows-Fin Gap in.

23.94 X 20 X 1.73

056/009mprdeepS

Output of Fan Motor W 40

71.0AALR

Capacitor μF /

CFM

1118

15.7

Axial fan - 1

Diameter in .

/

T1

I

IP24

PSI

PSI

dB (A)

53

175

552

F 41 - 115

dB (A)

63

33.4 X 12.6 X 21.3

34.6 X 14.2 X 22.3

in .

in .

lbs

lbs

ft

ft

ft

R410A

79.4/90.4

.2.65thgieW

Factory Prescharge

25

33

66

Gas additional charge 02/H

.33

Liquid Pipe Diameter mm

Φ6(1/4”)

Gas Pipe Diameter mm

Φ9(3/8”)

M

anufacturer/trademark

Starting Method

Type

Defrosting Method

Overload Protector

Air Flow Volume of Outdoor Unit

Outdoor Unit

Compress or

Fan

Fan Motor

Working Temp Range

Heat
Exchanger
Coil

Coil

Model

Coil length (l) x height (H) x coil width (L)

Throttling Method

Moisture Protection

Permis sible Exces sive Operating
Press ure for the Discharge Side
Permis sible Exces sive Operating
Press ure for the Suction Side

Type-Piece

Climate Type

Isolation

D

imension (W×H×D)

Dimension of Package (L×W×H)

Sound Pressure Level

Sound Power Level

Net Weight /Gross Weight

Connection
Pipe

Max. Interunit Piping Length

Max. Interunit Height Difference

Refrigerant

Name of refrigerant

Specifications

33 3/8 X 23 1/2 X 12 1/2

10

The above data is subject to change without notice. Please refer to the nameplate of the unit.

MR12C1H

SANYO

C-6RZ110H1A

Twin rotory

33A)A( .A.R.L

95.4A)A(ALR

Power Input(W) W 800

Int11l-3979

Electronic Expansion Valve

throttling

Transducer starting

Aluminum fin-copper tube

Pipe Diameter mm .275

2 - .005

Rows-Fin Gap in.

mm 747X508X44

086/009mprdeepS

Output of Fan Motor W 40

71.0AALR

Capacitor μF /

CFM

1118

15.7

Axial fan

Diameter in .

/

T1

I

IP24

PSI

PSI

dB (A)

55

175

552

F 41 - 115

dB (A)

65

33.4 X 12.6 X 21.3

34.6 X 14.2 X 22.3

in .

in .

lbs

lbs

ft

ft

ft

R410A

79.4/90.4

.2.65thgieW

Factory Prescharge

25

33

66

Gas additional charge H

1/4 oz per ft

Liquid Pipe Diameter mm

Φ6(1/4”)

Gas Pipe Diameter m

m

Φ9(3/8”)

Manufacturer/trademark

Starting Method

Type

Defrosting Method

Overload Protector

Air Flow Volume of Outdoor Unit

Outdoor Unit

Compress or

Fan

Fan Motor

Working Temp Range

Heat
Exchanger
Coil

Coil

Model

Coil length (l) x height (H) x coil width (L)

Throttling Method

Moisture Protection

Permis sible Exces sive Operating
Press ure for the Discharge Side
Permis sible Exces sive Operating
Press ure for the Suction Side

Type-Piece

Climate Type

Isolation

Dimension (W×H×D)

Dimension of Package (L×W×H)

Sound Pressure Level

Sound Power Level

Net Weight /Gross Weight

Connection
Pipe

Max. Interunit Piping Length

Max. Interunit Height Difference

Refrigerant

Name of refrigerant

Specifications

33 3/8 X 23 1/2 X 12 1/2

11

Specifications

Appending date

Table showing operation frequency limits for cooling and heating

Outdoor Relative Humidity 40% Outdoor Relative Humidity 72%

140

130

120

110

Indoor Wet Bulb
Temperature( )

59°F

68°F

77°F

100

80

60

40

Capacity Change Ratio (%)

20

15 35 55 75 95

Compressor Frequency(Hz)

Performance date for both cooling and heating

COOLING:

Temperature Condition

(°F)

Indoor Outdoor

80.06/66.92

80/67

95/–

Standard

Model
name

09K 0.8 to 1.1

12K detaR 0.1 ot 8.0

pressure

P (MPa)

Heat exchanger pipe
temp.

EVP (°F)C OD(°F)

50 to 54

140

130

120

110

100

80

60

40

Capacity Change Ratio (%)

20

105 to 10453 to 57
109 to 113

Indoor Wet Bulb
Temperature( )

15 35 55 75 95

Compressor Frequency(Hz)

Indoor fan

mode

Turbo
Turbo

Outdoor fan
mode

High

High

Compressor
revolution

Rated

59°F

60.8°F

62.6°F

(rps)

HEATING:

Temperature Condition

(°F)

Indoor Outdoor

67/60 47/43

66.98/60.08

46.99/42.99

Standard

Model
name

09K 2.8 to 3.2

12K 2.8 to 3.2

pressure

P (MPa)

Heat exchanger pipe
temp.

EVP (°F) COD(°C)

99 to 100
108 to 111

2 to 4

0 to 3

Indoor fan

mode

Turbo

Turbo

Compressor

Outdoor fan
mode (rps)

High

High

revolution

Rated

Rated

NOTES :
(1) Measure surface temperature of heat exchanger pipe around center of heat exchanger path
U bent. (Thermistor themometer)
(2) Connecting piping condition : 7.6 m

12

Expanded c apacity data tables for both cooling and heating

gnilooC

110

• Conditions

DB80°F/WB67°F

Indoor: DB80.06˚F/WB66.92˚F
Indoor air flow : TURBO
Pipe length : 7.6m

100

104

102

106

Outdoor temp. (˚F)

108

113

111

115

Capacity Ratio (%)

100

90

80

70

909793

919995

Specifications

Capacity Variation Ratio According to Pipe Length

110

105

100

95

Standard pipe length 7.6m

90

85

80

• Conditions

Indoor: DB80°F/WB67°F
Outdoor: DB95°F/WB75°F

Indoor air fl

Maximum pipe length 20m

10 15

ow: TURBO

Total pipe length (m)

30252005

110

105

100

95

90

85

80

01 .5

• Conditions

Indoor: DB80°F/WB67°F
Outdoor: DB95°F/WB75°F

Indoor air flow: TURBO

Maximum Elevation 7.6m

3.04 .5 6.07 .5 9.0

Total Elevation (m)

13

Specifications

Operation Characteristic Curve

gnilooC

• Conditions

25.0

22.5

20.0

17.5

15.0

12.5

10.0

Current (A)

7.5

5.0

2.5

Indoor: DB80°F/WB67°F
Outdoor: DB95°F/WB75°F

Indoor air flow : TURBO
Pipe lengt: 7.6m

0

01 02 03 04 05 06 07 09 0

9 btu unit

115V

Compressor speed (rps)

1 2 K o f 115 V U n its

12 btu unit

80

gnilooC

• Conditions

25.0

Indoor: DB80°F/WB67°F

22.5

Outdoor: DB95°F/WB75°F

Indoor air flow : TURBO

20.0

Pipe length: 7.6m

17.5

15.0

12.5

10.0

Current (A)

7.5

5.0

2.5

0

01 02 03 04 05 06 07 09 0

:

115V

Compressor speed (rps)

80

14

Specifications

2.5 Noise criteria curve tables for both models

09 btu units

0 9 K U n its

Indoor side noise when blowing

40

35

30

Noise/dB(A)

25

Low MiddleH igh

Indoor fan motor rotating speed

Turbo

12 btu unit

1 2 K U n its

70

60

50

40

Noise/dB(A)

30

20

Outdoor side noise

80 1006040200

Compressor frequency/Hz

Indoor side noise when blowing

40

35

30

Noise/dB(A)

25

20

Low MiddleH igh

Indoor fan motor rotating speed

Turbo

70

60

50

40

Noise/dB(A)

30

20

Outdoor side noise

80 1006040200

Compressor frequency/Hz

15

3. Construction Views

3.1 Indoor Unit

Constrction views

W

H

D

5 1/4 6 3/421

3.2 Outdoor Unit

W2

961245531

Unit:m m

D4

H2

System
Model
Number

09K

0 9K

12K

1 2K

16

W3

W4

D3

W H D W2 D4H2 D2 D3 W4W3

33 1/4 10 7/8 7 1/8 30 3/4 10 7/823 1/2 12 1/2 11 21 1/233 3/8

Outdoor Unit (mm)Indoor Unit (mm)

Additional DimensionsCabinetCabinet

D2

Refrigerant System D iagram

4. Refrigerant System Diagram

Cooling Models

GAS SIDE

TINU ROODTUOTINU ROODNI

HEAT
EXCHANGE
(EVAPORATOR)

3-WAY VALVE

LIQUID SIDE

2-WAY VALVE

Muffler

Discharge

Suction

COMPRESSOR

Accumlator

Electric Expansion
Valve

HEAT
EXCHANGE
(CONDENSER)

reniartSreniartS

COOLING

17

5. Schematic Diagram

5.1 Electrical Date

5.2 Electrical wiring

Outdoor Unit

These circuit diagrams are subject to change without notice, please refer to the one supplied with the unit.

Symbol Color symbol Symbol Color symbol

WH

WHITE

BN

BROWN

YE

YELLOW

BU

BLUE

RD

RED

BK

BLACK

YEGN

YELLOW GREEN PROTECTIVE EARTH

Indoor Unit

Indoor Unit

Schematic Diagram

L-OUT

L1

L1

0 0

RT1 RT2

M2

JUMP

CAP

TEM.SENSOR

ROOM

TUBE

TEM.SENSOR

FAN MOTOR

SWING MOTOR(U.D)

AP2

SWING-UD

K4

TUBEROOM

AC-L

PG

PGF

TR_OUT

TR_IN

TC

TRANSFORMER

13

DISPLAY

AP1

CN1

CN2

DISP-2DISP-1

M1

GG

XT1

W4 BU

W3 BN

N(1)

OUTDOOR UNIT

2

3

COM-OUT

W1 YEGN

W2 YEGN

N

W5 BK

I

II

ELECTRIC BOX

EVAPORATOR

Symbol Parts name Symbol Color symbol

L1 REACROR WH WHITE

PCB1~PCB2 PRINTED CIRCUIT BOARD YE YELLOW

S10/S11S40/S70/S80/S90 CONNECTOR RD RED

SAT OVERLOAD BN SAT OVERLOAD BN BROWN

COMP COMPRESSOR BU BLUE

PROTECTIVE EARTH BK BLACK

YEGN YELLOW GREEN

18

Outdoor Unit

Schematic Diagram

COMP

M

RT5

0

0

RT4

0

RT3

OUTROOM

EXHAUST

OUTTUBE

OFAN

E

OVERHEAT

R

E

C

S

U

V

W

CT1,2

AP1

W3YEGN

W10 RD

COMP

W8 YEGN

FAN MOTOR

W5 BU

W6 YE

W7 BK

AC-N1

AC-L1

COMU

EKV

CN1

TEM.SENSOR

OUTROOM

EXHUAST

TEM.SENSOR

TEM.SENSOR

TUBE

W2 BU

W1 BN

W4 BK

G

G

I

N
D
O
O
R

U
N
I
T

W13 YEGN

POWER

N

L

L

N

N(1)

3

2

L2L2L2

L1

L1

G

G

G

W15 BU

W14 BN

W16 WH

W17 RD

G

L4

L4

W23 OGW20 BU

W22 WH

W21 BN

AC-L2 AC-L4AC-N5AC-N3AC-N4 AC-L2AC-L3

W19 BU W24 RD

W18 YEGN

XT2

3

4

E

2

1

FILTER

C4

C3

2
1

2

1

Cooling Models of 115V

19

5.3 Printed Circuit Board

TOP VIEW

BO T TO M V IE W

Schematic Diagram

1

2 3

4

5

6

7

8

9

10

11

12

1 Interface of neutral wire

2 Transformer input

3 Interface of PG motor

4 Auto button

5 Feedback from PG motor

6 Up&Down swing

7 Jumper cap

8 Indoor temperature sensor

9 Pipe temperature sensor

10 DISP-1, DISP-2 display interface

11 Protective tube

12 Communication interface

20

TOP VIEW

BOTTOM VIEW

Schematic Diagram

Terminal of
jump wire,
live wire and

neutral wire,
AC-N4 joint

AC-N3,
AC-L2 joint

AC-L3

External connect high­capacity positive terminal

Protective

tube

External connect high­capacity negative
terminal

Terminal of DC fan

Live wire terminal of 4-way

valve

Terminal of jumper

wire, neutral wire

Neutral wire terminal

of 4-way valve

Main relay

Terminal of
ground wire

Slug of on-off
power

High frequency
transformer

Stabilized voltage

block 7805

IPM module

Terminal of
compressor

overload
protector

Discharge
terminal of

compressor

Outdoor
ambient

temperature
sensor

Terminal of
outdoor pipe
temperature

Terminal of power

lead-in wire and
live wire

Protective
tube

Terminal of

communication wire

Terminal of
power lead-in

wire and
neutral wire

21

6. Function and Control

6.1 Remote Control Operations

Function and Control

2

8

9

10

3

4

11

12

7

6

13

14

5

1

Press it to start or stop operation

ON/OFF

MODE

Press it to select operation mode
(AUTO/COOL/DRY/FAN/HEAT)

+

: Press it to increase temperature

setting

-

:

Press it to decrease temperature
setting

FAN

Press it to set swing angle

TIMER ON

TIMER OFF

CLOCK

X-FAN (page 31)

TEMP (page

31)

TURBO(page 32)

SLEEP(page

32)

Press it to turn on/off the light.

LIGHT

Press it to set fan speed

Press it to set auto-on timer

Press it to set auto-off timer

Press it to set clock





























Note: Only name different between X-FAN and BLOW,
but the function is the same.

MODE

(AUTO/COOL/DRY/FAN/HEAT).

setting.

: P ress to decrease temperature

setting.

FA N

Press it set swing angle.

TIMER ON

TIMER OFF

CLOCK

TEMP

TURBO

SLEEP

LIGHT

Press it to set auto-on timer.

Press it to set auto-o timer

Press it set clock.

1

6

7

5

3

2

4

11

10

14

9

12

13

15

3

9

10

13

12

5

4

11

8

7

2

1

6

8

Press it to turn on/o the light.

P res s to s tart or stop opera tion.

: P res s to increas e temperature

P res s to set fan speed.

P res s to s elect operation mode

SENSOR

AIR SWEEP

EXTEND

AUTO

17

15

14

START / STOP

Note: Only name different between X-Fan
and Blow, but the function is the same.

*Remote control works with cool and Heat Pump Models

?
?
?
?

22

Function and Control

Press this button to start the unit operation .Press this button again to stop the unit operation.

ON/OFF :

MODE :

Each time you press this button,a mode is selected in a sequence that goes from AUTO,
COOL,DRY, FAN,and HEAT

*

, as the following:

AUTO

COOL

DRY

FAN HEAT

*

*Note:Only for models with heating

function.

+ :

Press this button to increase set temperature.Holding down button above 2 seconds rapidly

Press this button to decrease set temperature.Holding down button above 2 seconds rapidly

.

FAN

:

Auto

Low speed

Medium speed

High speed

:

OFF

1

2

3

4

5

6

After energization, AUTO mode is defaulted. In AUTO mode, the set temperature will not

be displayed on the LCD, and the unit will automatically select the suitable operation

mode in accordance with the room temperature to make indoor room comfortable.

increases set temperature. In AUTO mode, set temperature is not adjustable.

decreases set temperature. In AUTO mode, set temperature is not adjustable.

This remote controller is universal . If any command , or is sent out,

the unit will carry out the command as

indicates the guide louver swings as:

Every press of FAN button changes the fan speed in the following order:

Every press of the button changes the swing angle in the follow order:

23

Function and Control

Pressing X-FAN button in COOL or DRY mode,the icon is displayed and the indoor

fan will continue operation for 10 minutes in order to dry the indoor unit even though you

X-FAN:

have turned off the unit.
After energization, X-FAN OFF is defaulted. X-FAN is not available in AUTO,FAN or

HEAT mode.

10

11

TEMP:

9

8

TIMER ON:

7

Press TIMER ON button, "ON" blinks and disappears. Within 5 seconds, every press of + or -

button increases or decreases the ON time setting by 1 minutes. Holding down either buton
above 2.5 seconds rapidly changes the time setting by 1 minute and then by 10 minutes.
Within 5 seconds after setting, press TIMER ON to confirm. To cancel the TIMER ON
operation, press TIMER ON button.

TIMER OFF :
Press TIMER OFF button to set TIMER OFF. The setting method is the same as TIMER

ON.

Press CLOCK button, the icon blinks. During 5 seconds blinking, pressing + or - button adjusts

CLOCK :

preset time. Holding down either button above 2 seconds increases or decreases the time by
1 minute every 0.5 second. If you are still pressing the button after 10 minutes increased or
decreased, the time will be changed by 10 minutes every 0.5 second. During blinking, press
the CLOCK button again, the icon will be constantly displayed and it indicates that setting
has been finished.

Press TEMP button, (set temperature), (indoor ambient temperature) and

(outdoor ambient temperatur) is displayed circularly. Not displaying icon is defaulted.

During operation of TEMP button, the set temperature is always displayed.
Note: Outdoor ambient temperature is only displayed for some models.

24

Function and Control

Press "+

" and "- " buttons simultaneously

to lock or unlock the keypad. If the remote

controller is locked, is

displayed. In this case,

pressing any button, blinks

three times.

At unit OFF, press "MODE

"

and

" - "

buttons simultaneously to switch between and .

ć



About switch between fahrenheit and cenrigrade

3

4

and About lock

2

4

and

LIGHT:

14

TURBO:

SLEEP:

12

13

Press this button in COOL or HEAT mode turns on/off Turbo function. After TURBO

function is set, its icon is displayed. When switching operation mode or changing

fan speed, this function will be canceled automatically.

at super high fan speed. (This function is not applicable for some models).

Press SLEEP button into SLEEP operation. Press SLEEP button again to cancel SLEEP.
This function only can be used in COOL, HEAT (applicable to heat pump unit) or DRY
mode, to maintain the most comfortable temperature for you.

Press LIGHT button turns on/off the display's light.

If the light is tunrned on , is

displayed. If the light is tunrned off

disappears.

25

Function and Control

ƾ

●

●

●

●

●

Sketch map for
replacing batteries

Replacement of Batteries

When the wireless remote controller is lost

o r damaged, please use the manual switch

on the main unit. Operation will be in AUTO

mode and the temperature setting or fan

speed can not be changed

.

The manual switch can be operated as follow:

To operate: Pressing the AUTO/STOP button,

the unit enters into AUTO mode.

The microcomputer will monitor the room

temperature to select the (COOL, HEAT, FAN)

mode automatically,to abtain the comfortable

effect.

To turn off: Press the AUTO/STOP button to

switch the unit off.

Emergency Operation

ƽ

ƽ

Manual switch

Fig.3

1.Remove the battery cover plate from the rear of the remote controller.

(As shown in the figure)

2.Take out the old batteries.

3.Insert two new AAA1.5V dry batteries, and pay attention to the polarity.

4. Replace the battery cover plate.

Notes:

When changing the batteries, do not use old or different batteries,

otherwise, it may cause malfunction of the wireless remote control.

If the wireless remote controller will not be used for a long time, please

remove batteries to prevent damage from leaking batteries.

The operation should be performed in its receiving range.

It should be kept 1m away from the TV set or stereo sound sets.

If the wireless remote controller does not operate normally, please take

the batteries out and replace them after 30 s. If still not operating properly,

replace the batteries.

26

6.2 Description of Each Control Operation

Function and Control

1. Temperature Parameters
Indoor preset temperature (T

preset

)

Indoor ambient temperature (T

amb.

2. Basic Functions

Once energized, in no case should the compressor be restarted within less than 3 minutes. In the situation that memory
function is available, for the first energization, if the compressor is at stop before de-energization, the compressor will be
started without a 3-minute lag; if the compressor is in operation before de-energization, the compressor will be started with
a 3-minute lag; and once started, the compressor will not be stopped within 6 minutes regardless of changes in room
temperature;
(1) Cooling Mode

Working conditions and process of cooling

When T

amb

.≥ T

preset

, the unit will enter cooling operation, in which case the indoor fan, the outdoor fan and the compressor
will work and the indoor fan will run at preset speed.
When T

amb

.≤ T

preset

-28 , the compressor will stop, the outdoor fan will stop with a time lag of 30s, and the indoor fan will
run at preset speed.
When T

preset

-28 <T

amb

.< T

preset

+34 F

FF

F

F

, the unit will remain at its previous state.

Under this mode, the four-way valve will be de-energized and temperature can be set within a range from 61 to 86

If the compressor is shut down for some reasons, the indoor fan and the swing device will operate at original state.

Protection

Antifreeze protection
Under cooling and dry mode, 6 minutes after the compressor is started:
If T

evap

.≤ 36 , the compressor will operate at reduced frequency.

If T

evap

.≤ -30 is detected for durative 3 minutes, the compressor will stop, and after 30 seconds, the outdoor fan will stop;
and under cooling mode, the indoor fan and the swing motor will remain at the original state.
If T

evap

. ≥ 42 and the compressor has remained at OFF for at least 3 minutes, the compressor will resume its original

operation state.

Total current up and frequency down protection

If I

total

≤ A, frequency rise will be allowed; if I

total

≥

B, frequency rise will not be allowed; ifI

total

≥ C, the compressor will

run at reduced frequency; and if I

total

≥ D, the compressor will stop and the outdoor fan will stop with a time lag of 30s.

(2) Dry Mode

Working conditions and process of dry

If T

amb

. T

preset

, the unit will enter cooling and dry mode, in which case the compressor and the outdoor fan will
operate and the indoor fan will run at low speed.
If T

preset

-28 T

amb

.≤ T

preset

, the compressor remains at its original operation state.

If T

amb

.< T

preset

-28 , the compressor will stop, the outdoor fan will stop with a time lag of 30s, and the indoor fan will

operate at low speed.

Start cooling

Stop cooling

Compressor

Original working state

Run

Stop

Outdoor fan

Indoor fan

T

preset

T

preset

-28

T

amb

Preset fan Speed

6 minutes

6 minutes

3 minutes

)

F

F

F

F

F

F

27

≤108°F, the indoor fan will run at low speed, and after one minute, the indoor fan

: if T

tube

≤104°F and the indoor fan is at stop state, the indoor fan will begin to run at low

b. A°F≤T
c. B°F≤T

<C°F, T

<C°F, T

<B°F, T

≥A°F, T

+36°F<T +41°F, the unit will maintain its

+41°F, the compressor will stop, the outdoor fan will stop with a time lag of 30s, and the indoor fan will stop

+36°F, the unit enters heating mode, in which case the four-way valve, the compressor and the outdoor fan

Function and Control

Protection
Protection is the same as that under the cooling mode.
(3) Heating Mode

Working conditions and process of heating
If T

amb

.≤T

preset

will operate simultaneously, and the indoor

fan will run at preset speed in the condition of preset

cold air prevention.

If T

amb.≥Tpreset

after 60-second blow at low speed
If T

preset amb.

< T

preset

original operating status.

Under this mode, the four-way valve is energized and temperature can be set within a range of 61 - 86°F

. The

operating symbol, the heating symbol and preset temperature are revealed on the display.

Condition and process of defrost
When duration of successive heating operation is more than 45 minutes, or accumulated heating time more than 90 minutes,
and one of the following conditions is reached, the unit will enter the defrost mode after 3 minutes.

a. T

outdoor amb. outdoor tube

≤W°F;

outdoor amb. outdoor tube

≤X°F;

outdoor amb. outdoor tube

≤Y°F;

d. T

outer amb. outer tube

≤Z°F
At that time, the indoor fan stops and the compressor stops, and after 30 seconds the outdoor fan will stop, and then after 30
seconds, the four-way valve will stop. After 30 seconds, the

compressor is initiated for raising the frequency to defrost

frequency.

When the compressor has operated under defrost mode for 7.5 minutes, or T

outer tube

≥E°F

, the compressor will be converted

to 53Hz operation. After 30 seconds, the compressor will stop

. And after another 30 seconds, the four-way valve will be

opened, and after 60 seconds, the compressor

and the outdoor fan will be started, the in

door fan will run under preset cold air

prevention conditions, and H1 will be displayed at temperat

ure display area on the display panel. Defrost frequency is

70Hz.

3.Protection

Cold air prevention

The unit is started under heating mode (the compressor is ON):

In the case of T

indoor amb.

<75°F

speed with a time lag of 2 minutes. Within 2 minutes, if T

tube

>40

, the indoor fan also will run at low speed; and after
1-minute operation at low speed, the indoor fan will be converted to operation at preset speed. Within 1-minute low speed
operation or 2-minute non-operation, if T

tube

>108°F

, the fan will run at present speed.

In the case of T

indoor amb.

≥75°F

: if T

tube

will be converted to preset speed. With

in one-minute low speed operation, if T

tube

, the indoor fan will be converted
to preset speed.
Note: T

indoor amb.

1 2

refers to, under initially heating mode, the indoor ambient temperature before the
command to start the compressor is performed according to the program, or after the unit is withdrawn from defrost, the
indoor ambient temperature before the defrost symbol is cleared.

Total current up and frequency down protection

If the total current I

total

≤W, frequency rise will be allowed; if I

total

≥X, frequency rise will not be allowed; if I

total

≥Y, the

compressor will run at reduced frequency; and if I

total

≥Z, the compressor will stop and the outdoor fan will stop with a time
lag of 30s.
(4) Fan Mode
Under the mode, the indoor fan will run at preset speed and the compressor, the outdoor fan, the four-way valve and the
electric heater will stop.

Under the mode, temperature can be set within a

range of 61°F - 86°F.

(5) AUTO Mode

Working conditions and process of AUTO mode

Under AUTO mode, standard cooling temperature T

preset

is 77°F

and standard heating temperature T

preset

is 64.4°F.

a. Once energized, if T

amb

.≤68°F

, the unit will be started under heating mode; if 68°F

< T

amb

.< 77°F

, the unit will run

under fan mode and the operation indicator lamp will be bright; and if T

amb

.≥77°F, the unit will be started under cooling mode.

>108°F

28

–(28°F

Function and Control

a. Under AUTO mode, if T

amb

.≥T

preset

is detected, the unit will select to run under cooling mode, in which case implicit

preset temperature is 77°F ; if T

amb

.≤T

preset

28°F, the compressor will stop, the outdoor fan will stop with a time lag of 1

minute, and the indoor fan will run at preset speed; and if T

preset

)< T

amb

.< T

preset

, the unit will remain at its original
state.
b. Under AUTO mode, if T

amb

. ≤T

preset

+36°F is detected, the unit will select to run under heating mode, in which case

implicit preset temperature is 64°F

; if T

amb

.≥T

preset

41°F

, the compressor will stop, the outdoor fan will stop with a time lag

of 1 minute, and the indoor fan will run under the mode of residue heat blowing; and if T

preset

+36°F

< T

amb

.< T

preset

+41°F, the
unit will remain at its original state. The cooling-only unit will run under fan mode.
c. Under AUTO mode, if 68°F< T

amb

.< 77°F, the unit will remain at its original state.

2.Protection
a. In cooling operation, protection is the same as that under the cooling mode;
b. In heating operation, protection is the same as that under the heating mode;
c. When ambient temperature changes, operation mode will be converted preferentially. Once started, the compressor will
remain unchanged for at least 6 minutes.
(6) Common Protection Functions and Fault Display under COOL, HEAT, DRY and AUTO Modes

Overload protection

T

tube

: measured temperature of outdoor heat exchanger under cooling mode; and measured temperature of indoor heat

exchanger under heating mode.

1) Cooling overload
a. If T

tube

≤106°F, the unit will return to its original operation state.

b. If T

tube

≥131°F, frequency rise is not allowed.

c. If T

tube

≥136°F, the compressor will r un at reduced frequency.

d. If T

tube

≥144°F, the compressor will stop and the indoor fan will run at preset speed.

2) Heating overload
a. If T

tube

≤106°F, the unit will return to its original operation state.

b. If T

tube

≥131°F, frequency rise is not allowed.

c. If T

tube

≥136°F, the compressor will run at reduced frequency.

d. If T

tube

≥144°F, the compressor will stop and the indoor fan will blow residue heat and then stop.

Exhaust temperature protection of compressor
If exhaust temperature ≥208°F, frequency is not allowed to rise.
If exhaust temperature ≥217°F, the compressor will run at reduced frequency.
If exhaust temperature ≥230°F, the compressor will stop.
If exhaust temperature ≤194°F and the compressor has stayed at stop for at least 3 minutes, the compressor will resume its
operation.

Communication fault

If the unit fails to receive correct signals for durative 3 minutes, communication fault can be justified and the whole system

will stop.

Module protection
Under module protection mode, the compressor will stop. When the compressor remains at stop for at least 3 minutes, the
compressor will resume its operation. If module protection occurs six times in succession, the compressor will not be started
again.

Overload protection
If temperature sensed by the overload sensor is over 239°F

, the compressor will stop and the outdoor fan will stop with a

time lag of 30 seconds. If temperature is below 203°F

, the overload protection will be relieved.

If voltage on the DC bus is below 150V or over 420V, the compressor will stop and the outdoor fan will stop with a time

lag of 30 seconds. When voltage on the DC bus returns to its normal value and the compressor has stayed at

stop for at least

3 minutes, the compressor will resume its operation.

Faults of temperature sensors

29

Designation of sensors Faults

Indoor ambient temperature

The sensor is detected to be open-circuited or short-circuited for successive 30
seconds

Indoor tube temperature

The sensor is detected to be open-circuited or short-circuited for successive 30
seconds

Outdoor ambient temperature

The sensor is detected to be open-circuited or short-circuited for successive 30
seconds

Outdoor tube temperature

The sensor is detected to be open-circuited or short-circuited for successive 30
seconds, and no detection is performed within 10 minutes after defrost begins.

Exhaust

After the compressor has operated for 3 minutes, the sensor is detected to be
open-circuited or short-circuited for successive 30 seconds.

Overload

After the compressor has operated for 3 minutes, the sensor is detected to be
open-circuited or short-circuited for successive 30 seconds.

3. Other Controls
(1) ON/OFF
Press the remote button ON/OFF: the on-off state will be changed once each time you press the button.
(2) Mode Selection:
Press the remote button MODE, then select and show in the following ways: AUTO, COOL, DRY, FAN, HEAT, AUTO.
(3) Temperature Setting Option Button
Each time you press the remote button TEMP+ or TEMP-, the setting temperature will be up or down by 34°F

. Regulating
Range: 61°F~86°F, the button is useless under the AUTO mode.
(4) Time Switch
You should start and stop the machine according to the setting time by remote controller.
(5) SLEEP State Control
a. When the air conditioner is under the mode of COOL, DRY, and the SLEEP mode has been set well, after the SLEEP
state keeps about 1 hour, the pre-setting T will raise 34°F, and it will raise 34°F again after 2 hours, so it raise 36°F in
2 hours, then it will run on at the setting temperature and fan speed.
b. When the air conditioner is under the mode of HEAT, and the Timer has been set well, after the SLEEP state keeps about
1 hour, the pre-setting T will reduce 34°F, and it will reduce 34°F again after 2 hours, so it reduce 36°F in 2 hours, then
it will run on at the setting temperature and wind speed.
c. The setting temperature keeps the same under the FAN mode and AUTO mode.
(6) Indoor Fan Control
The Indoor Fan can be set as HIGH, MED, LOW by remote controller, and the Indoor Fan will be respectively run at high,
medium, low speed. It will also be set as AUTO, and the Indoor Fan is as the following at the automatic fan speed.
Cooling mode: T

ring

≥ T

setting

+ 2, high speed; T

setting

- 2 T

ringTsetting

+ 2, medium speed; T

ring

≤ T

setting

– 2, low speed.

Sending fan mode: : T

ring

T

setting

+ 4, high speed; T

setting

+2≤T

ring

≤ T

setting

+ 4, medium speed; T

ring

T

setting

+2, low
speed.
Moisture removal mode: force to be set as the low speed
Heating mode: T

ring

≤ T

setting

+ 1 high speed; T

setting

+1 T

ringTsetting

+ 5, medium speed; T

ring ≥Tsetting

+ 2, low speed.
(7) Buzzer Control
The buzzer will send a

sound when the air conditioner is powered up or received the information sent by the remote
control or there is a button input, the single tube cooler doesn’t receive the remote control ON signal under the mode of
heating mode.
(8) Auto button
If the controller is on, it will stop by pressing the button, and if the controller is off, it will be automatic running state

by
pressing the button, swing on and light on, and the main unit will run based on the remote control if there is remote control
order.
(9) Up-and-Down Swinging Control
When power on, the up-and-down motor will firstly move the air deflector to o counter-clockwise, close the air outlet.
After starting the machine, if you don’t set the swinging function, heating mode and auto-heating mode, the up-and-down
air deflector will move to D clockwise; under other modes, the up-and-down air deflector will move to L1. If you set the
swing function when you start the machine, then the wind blade will swing between L and D. The air deflector has 7
swing states: Location L, Location A, Location B, Location C, Location D, Location L to Location D, stop at any
location between L-D (the included angle

between L~D is the same). The air deflector will be closed at 0 location, and the
swing is effectual only on condition that setting the swing order and the inner fan is running. The indoor fan and
compressor may get the power when air deflector is on the default location.

Function and Control

30

(10) Display

Operation pattern and mode pattern display
All the display patterns will display for a time when the unit is power de on, the operation indication icon will display in red under
standby status. When the machine is start by remote controller, the indication icon will light and display the current
operation mode (the mode light includes: Cooling, heating and dry). If you close the light key, all the display icons
will close.

Double-8 display
According to the different setting of remote control, the nixie lamp may display the current temperature (the temperature
scope is from 61°F to 86°F ) and indoor ambient temperature. The heating and air supply temperature will display 77°F
under auto-mode, the temperature will display 64

under the heating mF ode, and the temperature will display H1 under the

defrosting mode.(If you set the fahrenheit temperature displa

y, the nixie lamp will display according to fahrenheit
temperature)
(11) Protection function and failure display
E2: Freeze-proofing protection E4: Exhausting protection E5: Overcurrent protection
E6: Communication failure E8: Overload protection
F1: Indoor ambient sensor start and short circuit (continuously measured failure in 30S)
F2: Indoor evaporator sensor start and short circuit (continuously measured failure in 30S)
F3: Outdoor ambient sensor start and short circuit (continuously measured failure in 30S)
F2: Outdoor condenser sensor start and short circuit (continuously measured failure in 30S, and don’t measure within 10
minutes after defrosted)
F5: Outdoor exhausting sensor start and short circuit (continuously measured failure in 30S after the compressor operated 3
minutes)
H3: Overload protection of compressor H5: Module protection
PH: High-voltage protection PL: Low-voltage protection
P1: Nominal cooling and heating P2: Maximum cooling and heating
P3: Medium cooling and heating P0: Minimum cooling and heating
(12) Drying Function
You may start or stop the dry function under the modes of cooling and dry at the starting status (The modes of
automatism, heating and air supply do not have dry function). When you start the dry function, after stop the
machine by pressing the switch button, you should keep running the infoor fans for 10 minutes under low air damper (The
swing will operate as the former status within 10 minutes, and other load is stopped), then stop the entire machine; When
you stop the dry function, press the switch button will stop the machine directly.
When you start the drying function, operating the drying button will stop the inner fans and close the guide louver.
(13) Memory function when interrupting the power supply
Memory content: mode, swing function, light, set temperature and wind speed.
After interrupted the power supply, the machine will start when recovering the power according to the memory content
automatically. If the last

remote control command has not set the timed function, the system will remember the last remote
control command and operate according it. If the last remote control command has set timed function and the power supply
is interrupted before the timed time, the system will remember the timed function of the last remote control command, the
timed time will recounted form power on. If the last remote control command has set timed function, the time is out and the
system is start or stop according to the set time when the power supply is interrupted, the system will remember the
operation status before the power supply was interrupted, and do not carry out timed action; The timed clock will not be
remembered.

Heating angle

Cooling angle

Function and Control

31

Function and Control

Detect malfunctions of temperature sensor any time.

In defrosting period, the temperature sensor malfunction will not be detected. 5 min after finishing defrosting, the system begins to

detect the temperature sensor malfunction. In other times, the temperature sensor malfunction will be detected.

1. When short-circuit occurs to the temperature sensor for 30s:

The temperature sensor overheats. In this case, the complete unit will stop for protection. At the same time, the temperature protection

and temperature sensor malfunction will be shown.

2. When break-circuit occurs to the temperature sensor for 30s:

The unit will stop and the temperature sensor malfunction will be displayed

6.4 Frequency Control

<Outline>

When starting the compressor, or when conditions are varied due to the change of the room, the frequency must be initialized according

to the D value of the indoor unit and the Q value of the indoor unit.

Q value: Indoor unit output determined from indoor unit volume, air flow rate and other factors.

1. Pcontrol

Calculate D value in each sampling time (20 seconds), and adjust the frequency according to its difference from the frequency

previously calculated.

2. Icontrol

If the operating frequency is not change more than a certain fixed time, adjust the frequency up and down according to the D value,

obtaining the fixed D value.

When the D value is small...lower the frequency.

When the D value is large...increase the frequency.

3. Frequency management when other controls are functioning

When frequency is drooping;

Frequency management is carried out only when the frequency droops.

For limiting lower limit

Frequency management is carried out only when the frequency rises.

4. Upper and lower limit of frequency by PI control

The frequency upper and lower limits are set depending on indoor unit.

When low noise commands come from the indoor unit or when outdoor unit low noise or quiet commands come from indoor unit, the

upper limit frequency must be lowered than the usual setting.

6.5 3-minutes Standby

Prohibit to turn ON the compressor for 3 minutes after turning it off.(except when defrosting)

6.6 Compressor Protection Function

When turning the compressor from OFF to ON, the upper limit of frequency must be set as follows. (The function must not be used when

defrosting.)

FCG 3

FCG 2

FCG 1

TCG1

TCG2

88

64

48

240

360

TCG 1sec TCG 2sec TCG 3sec

Time

Frequency

FCG3

FCG2
FCG1

6.3 Detection of temperature sensor malfunction

32

6.7 Discharge Pipe Control

Outline

The discharge pipe temperature is used as the compressor’s internal temperature. If the discharge pipe temperature rises above a

certain level, the operating frequency upper limit is set to keep this temperature from going up further.

Detail

6.8 Input Current Control

Outline

Detect an input current by the CT during the compressor is running, and set the frequency upper

limit from such input current.

In case of heat pump model, this control is the upper limit control function of the frequency which

takes priority of the lower limit of four way valve activating compensation.

Detail

The frequency control will be made within the following zones.

When a “stop current” continues for 2.5 seconds after rushing on the stop zone, the compressor operation stops.

If a “drooping current” is continues for 1.0 second after rushing on the drooping zone, the frequency will be 2 Hz drooping.

Repeating the above drooping continues until the current rushes on the drooping zone without change.

In the keep zone, the frequency limit will remain.

In the return / reset zone, the frequency limit will be cancelled.

Limitation of current drooping and stop value according to the outdoor air temperature

1. In case the operation mode is cooling

* The current droops when outdoor air temperature becomes higher than a certain level (model by model).

2. In case the operation mode is heating

* The current droops when outdoor air temperature becomes higher than a certain level (model by model).

6.9 Freeze-up Protection Control

Outline

Divide the Zone

Management within the Zones

stnetnoc lortnoCenoZ

Stop zone When the temperature reaches the stop zone, stop the compressor and

correct abnormality.

Drooping zone Start the timer, and the frequency will be drooping.

Keep zone Keep the upper limit of frequency.

Return / Reset zone Cancel the upper limit of frequency.

Heat exchanger

thermistor

temperature

Stop zone

Drooping zone

Keep zone

Up zone

Reset zone

2 Hz drooping

1.0second after
rushing in the
drooping zone

After 2.5 seconds

Compressor stops

Stop zone

Drooping zone

Keep zone

Reset zone

1

2

3

Function and Control

33

During cooling operation, the signals being sent from the indoor unit allow the operating frequency limitation and then prevent

freezing of the indoor heat exchanger. (The signal from the indoor unit must be divided into the zones as the followings.)

Detail

Conditions for Start Controlling

Judge the controlling start with the indoor heat exchanger temperature after 2 sec from operation start.

Control in Each Zone

A

B

C

D

E

Return/Reset zone

Up zone

Keep zone

Drooping zone

Stop zone

Heat exchanger
thermistor temperature

Function and Control

34

6.12 Fan Control

Outline

Fan control is carried out according to the following priority.

1. Fan ON control for electric component cooling fan

2. Fan control when defrosting

3. Fan OFF delay when stopped

4. ON/OFF control in cooling operation

5. Tap control when drooping function is working

6. Fan control in forced operation

7. Fan control in indoor/outdoor unit silent operation

8. Fan control in powerful mode

9. Fan control in normal operation

Detail

Fan OFF Control when Stopped

* Fan OFF delay for 60 seconds must be made when the compressor is stopped.

Tap Control in indoor/outdoor unit silent operation

1. When Cooling Operation

When the outdoor air temperature is lower than 99°F, the fan tap must be set to L.

2. When Heating Operation

When the outdoor air temperature is higher than 39°F, the fan tap must be turned to L (only for heat pump model).

Frequency

Compressor

Four way valve

Fan

Electronic expansion

valve opening

ON

OFF

ON

OFF

ON

OFF

0Hz

5sec.

350pps 450pps450pps

Initial opening

PI control

5sec.

50sec.50sec. 600sec.

60sec.

Function and Control

35

7. Installation Manual

Installation Manual

Select a position where the condensing water can be easily drained out, and the place

is easily connected for outdoor unit.

Can select the place where is strong enough to withstand the full weight and vibration o

f

the unit. And will not increase the noise.

Make sure that the indoor unit installation should accord with installation dimension

diagram requirements.

Select a location where the children can not reach.

The unit installation work must be done by qualified personnel according to the local

rules and this manual.
Before installating, please contact with local authorized maintenance center, if unit is
not installed by the authorized maintenance center, the malfunction may not solved,

due to discommodious contacts.

W

T he appliance must be positioned so that the plug is accessible

After pull out the power plug then make the appliance operation again，to avoid the

icing of outdoor unit damage axial flow fan

，should electrify the appliance but not

operation for 4 hours for warm-up purpose(only for Heat Pump models).

hen removing the unit to the other place, please firstly contact with the authorized

Maintenance Center in the local area.

Important Notices

Basic Requirements For Installation Position

Install in the following place may cause malfunction. If it is unavoidable contact with
service center please:

Place where strong heat sources, vapors, flammable gas or volatile object are emitted.
Place where high-frequency waves are generated by radio equipment, welders and

medical equipment.
Place where a lot of salinities such as coast exists.
Place where the oil (machine oil) is contained in the air.

Place where a sulfured gas such as the hot spring zones is generated.

Other place with special circumstance.

Indoor Unit Installation Position Selection

The air inlet and outlet vent should be far from the obstruction, make sure that the air
can be blown through the whole room.

Be sure to leave enough space to allow access for routine maintenance. The height of the
installed location should be 8ft or more from the floor.

Select a place about 1m or more away from TVset or any other electric appliances.

Select a place where the filter can be easily taken out.

Do not use the unit in the immediate surroundings of a laundry a bath a shower or a
swimming pool.

7.1 Notices for installation

36

Outdoor Unit Installation Position Selection

Select a location from which noise and outflow air emitted by unit will not inconvenience

neighbors, animals, plants.

Select a location where there should be sufficient ventilation.

Select a location where there should be no obstructions cover the inlet and outlet vent .

The location should be able to withstand the full weight and vibration of the outdoor unit

and permit safe installation.

Select a dry place, but do not expose under the direct sunlight or strong wind.

Make sure that the outdoor unit installation dimension should accord with installation

dimension diagram, convenient for maintenance, repair.
The height difference of connecting the tubing within 16ft, the length of connecting the
tubing within 32ft.
Select a place where it is out of reach for the children.
Select a place where will not block the passage and do not influence the city appearance.

Safety Requirements For Electric Appliances

1. The power supply should be used the rated voltage and AC exclusive circuit,

the power cable diameter should be satisfied.

2. Don't drag the power cable emphatically.

It should be r eliably earthed, and it should be connected to the s pecial earth device,

3.

the installation work should be operated by the professional.

The air switch must have the functions of magnetic tripping and heat tripping, in order

to protect the short circuit and overloading.

4. The min. distance from the unit and combustive surface is 5ft.

5. The appliance shall be installed in accordance with national wiring regulations.
An all-pole disconnection switch having a contact separation of at least 3mm in all poles

6.
should be connected in fixed wiring.

Installation Manual

Make sure that the Live wire or Zero line as well as the ground wire in the family power
socket can not be wrong connected, there should be reliable and no short circuit in the
diagram.

wrong connection may cause fire.

Ground requirements

1. Air conditioner is type I electric appliance, thus please do conduct reliable earthing
measure.

2. The yellow-green two-color wire in air conditioner is earthing wire and cannot be used
for other propose. It cannot be cut off and be fix it by screw, otherwise it would cause
electric shock.

3. The earth resistance should accord to the National Criterion.

4. The user power must offer the reliable grounding terminal. Please don't connect the

earthing wire with the following place:

Tap water pipe. Gas pipe.

Other places that professional personnel consider them unreliable.

5. The model and rating values for fuses according the silk print on fuse cover or related
PCB board.

Contamination pipe.

37

Installation Manual

Space to the wall

Space to the ceiling

Space to the wall

Space to the wall

Air outlet side

Space to the floor

Space to the obstruction

Air outlet side

Space to the wall

Air inlet side

The dimensions of the space necessary for correct
installation of the appliance including the minimum
permissible distances to adjacent structures

7.2 Installation dimension diagram

12 in. side

6 in.
side

above

6 in. to side

6 ft.

from

bottom

10 ft. from front

6 in. to side

12 in. side

12 in. back

19 in. top

7 ft. front

38

7.3 Installing Indoor Unit

1.Make the mounting plate completely level
indoor unit during installation should slightly slant to watert tray's outlet for smooth drainage of condensing
water.

2.Fix the mounting plate on the wall with screws.(Where is pre-covered with plastic granula)

3.Be sure that the mounting plate has been fixed firmly enough to withstand the weight of an adult of 60kg;
further more, the weight should be evenly shared by each screw.

Installing Mounting Plate

the water tray's oulet of the indoor unit is two-way type, the

. As

Installation Manual

Wall

Space
to the
wall
6 in

above

Mark on the middle of it

Gradienter

Left

(Rear piping hole)

Fig.5

(Rear piping hole)

Boring Piping Hole

1.Make the piping hole (2.5 in) in the wall at a slight downward slant to the
outdoor side.

2.Insert the piping-hole sleeve into the hole to prevent the connection piping
and wiring from being damaged when passing through the hole.

Installing Drain Hose

1.For proper draining, the drain hose should be placed at a downward slant.

2.Do not wrench or bend the drain hose or flood its end by water.

3.The long drain hose passing through indoor areas should
be wrapped with insulation material.

Wall

Space
to the
wall
6 in

above

Right

2.5 in2.5 in

Indoor Outdoor

Wall pipe

Wrenched Bent

Seal pad

Flooded

55

Ø

Connecting Indoor and Outdoor Electric Wires

1.Open the front panel.

2.Remove the wiring cover as shown in Fig 6.

3.Make the power connection cord and signal control wire (onlyf or heat pump unit ) through the hole in the
the back of indoor unit.

4.Reinstall the clamp and wiring cover.

5.Recovert he front panel.

(only for heat pump unit) through the hole in the

Fig.6

39

Installation Manual

Installing Indoor Unit

The piping can be output from right, right rear, left

or left rear.

When routing the piping and wiring from the left
or right side of indoor unit, cut off the tailings
from the chassis as necessary(As shown in Fig.7)

Cut off the tailings 1 when routing the wiring only;

Cut off the tailings 1 and tailings 2 when routing

both the wiring and piping.
Take out the piping from body case, wrap the piping,
power cords, drain hose with the tape and make them
through the piping hole. (As shown in Fig.8)

Hang the mounting slots of the indoor unit on the
upper hooks of the mounting plate and check if it is

firm enough.(As shown in Fig.9)

The height of the installed location should be 8ft

or more from the floor.

Installing Connection Pipe

Align the center of the piping flare with the relevant valve.

Screw in the flare nut by hand and then tighten the
nut with spanner and torque wrench referring to the
following:

NOTE: Firstly connect the connection pipe to indoor unit, then to outdoor unit; pay attention
to the piping bending, do not damage the connection

pipe; ensure the joint nut is adequately

tightened, otherwise it may cause leakage.

Spanner

Torque
wrench

Piping

Taper nut

Indoor unit piping

Fig.9

Mounting

plate

Fixing hook

Mounting
plate

Right

Right rear

Fig.8

Left rear

Left

Fig.7

Tailing 1

Tailing 2

Finally wrap it
with tape

Gas side piping
insulation

Water drainage pipe

Liquid side

Piping insulation

Gas side pipe

External connection

electric wire
Liquid side piping

Hex nut diameter

Tightening torque (lb ft)

11 ~ 14.7

22.8 ~ 25.8

36.9 ~ 40.6

44.3 ~ 47.9

51.6 ~ 55.3

After tightening the screws, slightly pull the wire and confirm whether it is firm or not.

Ensure all wiring connections are secure and the cover plates are reinstalled properly.Poor

NOTE:

All interconnecting wiring between indoor and outdoor unit must be performed by a

a licenced electrical contractor

The electric wiring must be correctly connected.Improper connection may cause spare parts
malfunction.

Tighten the terminal screws adequately to prevent loosening.

Ensure the electrical connections are properly earthed to prevent electrical shocks.

installations that allow dust or moisture incursion may cause fire or electrocution.

6ft

40

Ø

Condensate drainage of outdoor unit (not for cooling only)

The condensate and defrosting water formd during heating
in the outdoor unit can be properly discharged by drainage
pipe .
Installation method:set the drain connection in 25 hole of the
chassis has been installed and then connect drainage pipe
with drain nozzle,so that condensate and defrosting water can
be properly discharged

Chassis
Drain

connection

Electric wiring

NOTE:

Wrong wiring may cause spare parts malfunction.
After the cable fixed, make sure there should be a free space between the connection

and connection and fixing place on the lead wire.

Cable Cross Plate sub-assy

Air purging and leakage test

Disassemble the cable cross plate sub-assy on the outdoor unit

right side plate.

Take off wire clamp. Connect and fix power connect
cord (for cooling and heating unit,connect and fix power
connect cord and signal control wire)to terminal of line

Fix the power connection cable with wire clamp,
(for cooling and heating unit, use the wire clamp
to fix the power connection cable and the signal
control wire), then connect the corresponding

Ensure wire has been fixed well.

Install the cable cross plate sub-assy.

connector.

bank. Wiring should fit that of indoor unit.

5

Fig.

1. Connect charging hose of manifold valve to charge end of low pressure
valve (both high/low pressure valves must be tightly shut).

2. Connect joint of charging hose to vacuum pump.

3. Fully open handle handle of Lo manifold valve.

4. Open the vacuum pump to evacuate. At the beginning, slightly

loosen joint nut of low pressure valve to check if there

is air coming inside. (If noise of vacuum pump has

been changed, the reading of multimeter is 0) Then
tighten the nut.

5. Keep evacuating for more than 15mins and make
sure the reading of multi-meter is

6. Fully open high/low pressure valves.

7. Remove charging hose from charging end of low pressure valve.

8. Tighten bonnet of low-pressure valve. (As shown in Fig.10)

Liquid pipe

Gas pipe

Valve

cap

Vacuum

gauge

Vacuum pump

For 115V Uints

For 208~230V Uints

Power

Power

7.4 Installing Outdoor Unit

Installation Manual

*Note: Terminal 2 is the communication connection

41

Do not switch on power before installation is finished completely.

Electric wiring must be connected correctly and securely.

Cut-off valves of the connection pipes should be opened.

Switch on power and press "ON/OFF" button on the wireless remote controller to start

the operation.

Check after Installation

Items to be checked Possible malfunction

Has it been fixed firmly?

The unit may drop, shake or emit noise.

Have you done the refrigerant leakage test?

It may cause insufficient cooling(heating)
capacity

Is heat insulation sufficient?

It may cause condensation and dripping.

Is water drainage satisfactory?

It may cause condensation and dripping.

Is the voltage in accordance with the rated
voltage marked on the nameplate?

It may cause electric malfunction
or damage the product.

Is the electric wiring and piping
connection installed correctly and securely?

It may cause electric malfunction

or damage the part.
Has the unit been connected to a secure
ground connection?

It may cause electrical leakage.

Is the power cord specified?

It may cause electric malfunction

or damage the part.

Are the inlet and outlet openings blocked? It may cause insufficient cooling(heating)

capacity.

Is the length of connection pipes
and refrigerant capacity been recorded?

The refrigerant capacity is not accurate.

Operation Test

Before Operation Test

All the impurities such as scraps and thrums must be cleared from the unit.

Operation Test Method

Press MODE button to select the COOL, HEAT (Cooling only unit is not available),
FAN to check whether the operation is normal or not.

7.5 Check after Installation and Operation Test

Installation Manual

42

Fig. a

1.

2.
(as shown in Fig.b).

3. Mount the air filter properly along the arrow
direction in Fig.c, and then close the panel cover.

Cleaning and Maintenance

Service Life

ƽ

filter

Air filter

(as shown Fig.a)

Fig. b

Fig. c

Lift up the front panel from the two ends
of it, as the arrow direction shown. Then
pull the air filter out.

Attach the healthy filter onto the air filter,
.

Healthy

Remove the healthy filter before cleaning and re-install it after clean
according to the installation instruction, but can't with brush or hard
things. After washing, be sure to shake off remaining water and dry
in the shade.

The healthy filter commonly has its usage life time for one year under
normal condition. As for silver ion filter, it is invalid when its surface
becomes black (green).

This supplementary instruction is provided for reference to the unit with
healthy filter. If the graphics provided herein is different from the physical
goods, the latter one shall prevail. The quantity of healthy filters shall be
based on the actual delivery.

Installation of Healthy Filter

7.6 Installation and Maintenance of Healthy Filter(Optional)

Installation Manual

43

Troubleshooting

9. Troubleshooting

9.1 Precautions before Performing Inspection or Repair

Be cautious during installation and maintenance. Do operation following the regulations to avoid electric shock and casualty or even death

due to drop from high altitude.

* Static maintenance is the maintenance during de-energization of the air conditioner.

For static maintenance, make sure that the unit is de-energized and the plug is disconnected.

* Dynamic maintenance is the maintenance during energization of the unit.

Before dynamic maintenance, check the electricity and ensure that there is ground wire on the site. Check if there is electricity on the

housing and connection copper pipe of the air conditioner with voltage tester. After ensure insulation place and the safety, t he mainte-

nance can be performed.

Take sufficient care to avoid directly touching any of the circuit parts without first turning off the power.

At times such as when the circuit board is to be replaced, place the circuit board assembly in a vertical position.

Normally,diagnose troubles according to the trouble diagnosis procedure as described below.(Refer to the check points in servicing

written on the wiring diagrams attached to the indoor/outdoor units.)

No. Troubleshooting procedure

1 Confirmation

2 Judgement by Flashing LED of Indoor/Outdoor Unit

3 How to Check simply the main part

Precautions when inspecting the control section of the outdoor

unit:

A large-capacity electrolytic capacitor is used in the outdoor unit controller

(inverter).Therefore,if the power supply is turned off,charge(charging volt-

age DC280V to 380V)remains and discharging takes a lot of time.. After

turning off the power source,if touch in g the charging sect io n before

discharging, an electrical shock may be caused.

Please open the outdoor unit after the unit is power off for 20min.

9.2 Confirmation

(1)Confirmation of Power Supply

Confirm that the power breaker operates(ON) normally;

*Trouble shooting is for cooling and Heat Pump models.

(2)Confirmation of Power Voltage

Confirm that power voltage is AC 220-240± 10%.

If power voltage is not in this range, the unit may not operate normally.

9.3 Judgement by Flashing LED of Indoor/Outdoor Unit

115 ± 10%.

44

The breaker trips at once when it is set to
"ON".

Measure insulation resistance to grou
nd to see

if there is any leakage.

Trip of breaker or blow
of fuse

The breaker trips in few
minutes

when it is set to "ON"

Check power supply circuit.

Check if the plug is properly plugged in
and make the loose contact firm.

Change controller fuse

Check remote controller

Change batteries

Power voltage is too low

Remote controller malfunction

Receiver is broken

Controller is broken

Receiver loose or poor connection

No power

Fuse of controller burnt out

Remote controller is short of power

Power plug is not well plugged in and poor
connection

Fasten the wiring; measure the output
voltage of the transformer, if it is
incorrect, change the transformer

The air conditioner
does not react after
it is powered ( after

the plug is inserted,
the buzzer does

not sound and the
remote startup has
no response)

The remote contro­ller signals (after it is
powered, the buzzer
will sound, unless it
has malfunction)

The circuit or the part of the air conditioner has
malfunction. They heat and break the insulation
and lead to short circuit or creepage. Measure
the insulation resistance or eliminate the malfunc­tion one by one. If the breaker itself has
malfunction, then replace the breaker.

The transformer connection is loose or has
bad contact or the transformer has
malfunction

First, press the manual switch button
AUTO,if there is no response,check
based on the above methods. If it runs
normally after p

ressing the button,check
again whether the installation position
and the connection wire of the reception
head is correct. If it is correct,then repla­ce the receiver or the remote controller.

Check the voltage. If it is lower than 10% of the rated
voltage, check the

cause, improve the power supply

condition and add the stabilized voltage

power supply.

Air conditioner can not start up

Troubleshooting

45

Improper set of temperature

Adjust set temperature

If cooling (heating) load is

proper

Check the forecasted load of cooling (heating)

The refrigerant has leakage or is

insufficient

heck and fill the leakage, then

vacuumize it and supplement the re-

frigerant as required

Leakage between the high pres-

sure and the low pressure in-

side the compressor

Replace the compressor

Malfunction of four-way valve Replace the four-way valve

Local block of capillary Replace the capillary

Blockage of cooling system

Judge whether the system is blocked by

observing the condensation of evapora-

tor and the pressure value of the high

pressure manometer and take measures

to deal with the system.

Malfunction of

refrigerant

flow

Heat insulation for the connection

pipes of the indoor unit and the out-

door unit is bad.

Make sure that heat insulation for the thick and thin pipes

is good. Heat insulation must also be provided for the

joint andthe exposed part of the copper pipe .

Block of outdoor heat ex-

changer

Clean the dust accumulated on the surface of

the heat exchanger.

Air filter were blocked

Clean the filter

Fan speed was set too slow

To set the fan speed to high or

middle speed

Air circulation
is insufficient

Fan rotation speed becomes

low

Capacitor

damage

Motor damage

Replace the capaci-

tor

Replace the motor

The installation position of the

outdoor unit is not appropriate.

Good ventilation must be provided for the

installation position of the outdoor unit.

The outdoor temperature is too high.

Properly install the rainproof plate or the sunproof plate. If the

maximum cool air still can not meet the requirement, it is sug-

gested to replace the air conditioner.

Keep certain air tightness indoors, try not to use

electricalappliance with large quantity of heat

The air tightness is not enough. People

come in and out too frequently. There

are heating devices indoors.

Poor COOL(HEAT) operation

Troubleshooting

46

The indoor fan motor is burned or bre­aks or has the heat protector malfun­ction.

Replace the fan motor or the defective part.

The built-in heat protector of the motor
breaks frequently because the motor is
abnormal.

Replace the fan motor

Wrong connection

Make the correction connection based on the circuit
drawing.

The fan does not
run when it is set
to supply air.

The fan capacitor has open circuit or
is damaged

Replace the fan capacitor of the same type and same
specification.

The outdoor fan motor is damaged.

Replace the fan motor

Wrong connection

Make the correct connection based on the circuit
drawing.

In the cooling and
heating mode, the
compressor runs,
but the outdoor
fan does not run.

The outdoor fan capacitor is damaged.

Replace the fan capacitor

Malfunction of compressor Replace the compressor

Breakage of running capacitor of
compressor

Replace the capacitor

The voltage is too low or too high.

Manostat is recommended.

Wrong wire connection

Connect the circuit diagram correctly

When cooling or
heating, outdoor
fan runs,compr-

essor

doesn't run.

The protector itself has malfunction.

Use the multimeter to check whether the contact of
the compressor is on when it is not overheated. If it
is not on, then replace the protector

The refrigerant is not enough or is too
much.

Adjust the volume of the refrigerant

The capillary is blocked and the temp­erature rises.

Replace the capillary

The compressor does not run smoothly
or is stuck. The air discharge valve is
damaged

Replace the compressor

The compressor is
too hot and leads to
the action of the
protector.

The protector itself has malfunction.

Replace the protector

The torque of the swing motor is not
enough

wrong connection

The swing fan
does not run.

The controller is damaged

IC2003 is

damaged

, the swing relay can not close,

etc

First, check whether the connection is wrong. If no,
replace the parts

Troubleshooting

47

Water leakage

Abnorma l sound

and shake

Drainage pipe blocked or broken

Change drainage pipe

Wrap of refrigerant pipe joint is not close

enough.

Re-wrap and make it tight.

Fan of indoor unit contacts other parts. Adjust fan location.

Foreign object in indoor unit

Take out the foreign object.

Com

pressor shakes too much.

Ad ju st s up port washe r of com pr essor, and

tighte

n loosen screws.

Touch of pipeline of outdoor unit

Separat

e t

he touching pipeline.

Touch of inner plates

Louver of outdoor unit touched outer

case.

Abnormal sound inside compressor

Change compressor

Adjust location of louver.

1. Tighten connect screw.

2. Stick absorbing clay between plates.

In cool, heat mode,
the outdoor uni t a n d
com p resso r will n ot
run.

C o n t r o l l e r m al fu n c ti on ( I C 2 0 ­0 3 b r o k e n, cre e page of par alle l
ca paci tor o f r e lay loop , relay is bro­ken etc.)

Wire l o ose o r wrong c o nnection

Imp rope r sett i ng of t empe r atur e

Cha n ge cont r oller

Cor r e c tly wir e a c c ordin g t o t h e d rawin g

Adj ust s e ttin g temp .

Troubleshooting

48

IPM protection

Overcurrent protection

Overload protection

Exhaust protection

Overlod protection of compresoor

r

Outdoor condenser temp. sensor mal.

Outdoor exhaust temp. sensor mal.

Starting at temp. does not reach

Communication is abnormal

Indicator display

of outdoor unit

If malfunction occurs,corresponding code will display and the unit will resume normal until protection or

malfunction disappears.

Compressor stars (normal)Yellow indicator blinks for once

Yellow indicator blinks for 3 times

Defrosting

(normal display of indoor unit)

Yellow indicator

blinks for twice

Yellow indicator blinks for 4 times

Yellow indicator blinks for 5 times

Yellow indicator blinks for 6 times

Yellow indicator blinks for 7 times

Yellow indicator blinks for 8 times

Red indicator blinks for once

Red indicator blinks for twice

Red indicator blinksfor 3 times

Red indicator blinks for 4 times

Red indicator blinks for 5 times

Red indicator for 6 times

Red indicator blinks for 7 times

Red indicator blinks for 8 times

Green indicator does not blink

Anti-freezing protection (normal

display of indoor unit)

Cooling (dehumidify) or heating current

Exhaust temp. dropped frequency temp.

dropped frequency current.

temp. dropped frequency temp.

T

tube-in

dropped frequency temp.

Outdoor ambient temp. sensor mal.

Tube

Troubleshooting

49

Troubleshooting

YELLOW-LED4 GREEN-LED2 RED-LED3

Name of running status Yellow light Red light Green light Indoor unit display

1 Compressor start Blink once

2 Defrosting Blink twice H1

3 Anti-freezing protection Blink three times E2

4 IPM protection Blink four times H5

5 Overcurrent protection Blink five times E5

6 Overload protection Blink six times H4

7 Air exhaust protection Blink seven times E4

8 Overload protection Blink eight times H3

9 Limited frequency (current) Blink once

10 Limited frequency (Air exhaust) Blink twice

11 Limited frequency (overload) Blink three times

12 Limited frequency (anti-freezing) Blink four times

13 Outdoor unit ambient sensor malfunction Blink five times F3

14 Outdoor unit tube temp. sensor malfunction Blink six times F4

15 Outdoor air exhaust sensor malfunction Blink seven times F5

16 Achieve the temperature of unitstartsup Blink eight times

17 Communication is normal Blink continuously

18 Communication malfunction OFF E6

19 Overload sensor malfunction Blink nine times H3

20 Low voltage protection Blink twelve times PL

21 High voltage protection Blink thirteen times PH

22 Indoor ambient sensor malfunction F1

23 Indoor tube temperature sensormalfunction F2

24 Normal cooling or norminal heating P1

25 Max. cooling or max. heating P2

26 Interim cooling or interim heating P3

27 Min. cooling or Min. heating P0

50

Troubleshooting

Analysis or processing of some of the malfunction display:

1. Compressor discharge protection
Possible reasons: shortage of refrigerant; blockage of air filter; poor ventilation or air flow short pass for condenser;

the system has noncondensing gas (such as air, water etc.); blockage of capillary assy (including filter); leakage
inside four-way valve causes incorrect operation; malfunction of compressor; malfunction of protection relay;

malfunction of discharge sensor; outdoor temperature too high.

Processing method: refer to the malfunction analysis in the above section.

2. Low voltage over current protection
Possible reas on: Sudden drop of supply voltage.

3. Communication malfunction

Processing method:Check if communica ti on signal cable is connected reliably.

4. Sensor openo rs hort circuit

Processing method: Check whether sensor is normal, connected with the corresponding position on the
controller and if damage lf lead wire is found.

5. Compressor overload protection

Possible reasons: insufficient or too much refrigrant; blockage of capillary and increase of suction temp.;
improper running of compressor, burning in or stuck of bearing, damage of discharge valve;
malfunctioning of protector.

Processing method: adjust refrigerant amount; replace the capillary; replace the compressor; use
universal meter to check if the contactor of compressor is fine when it is not overheated, if not replace
the protector.

6. System malfunction

i.e.overload protection.When tube temperature (Check the temperature of outdoor heat exchanger
when cooling and check the temperature of indoor heat exchanger when heating) is too high,
protection will be activated.

Possible reasons: Outdoor temperature is too high when cooling; insufficient outdoor air circulation;
refrigerant flow malfunction.
please refer to the malfunction analysis in the previous section for handling method .

7. IPM module protection

Processing method:Once the module malfunction happens,if it persists for a long time and can not be self- canceled,
cut off the power and turn off the unit,and then re-energize the unit again after about 10 min. After repeating the

procedure for sever times, if the malfunction still exists, replace the module.

51

Troubleshooting

9.4 How to Check simply the main part

Main Check Points:

Units of 115V: Use AC voltmeter to check wether the voltage between terminal L and N on the wiring board is 115V AC

Units of 115V: Whether t he reactor (L) is correctly connected? Whether the connection is loose or fallen? Whether the reactor

(L) is damaged ?

Fault diagnosis process:

Switch on the unit
and wait 1 minute

Use DC voltmeter

to measure the
voltage on the two
ends of electrolytic

capacitor (test3)

Voltage higher than 103.5V?

For 115V Units

Voltage higher than 187V?

For 208~230V Units

N

Measure the AC voltage between
terminal L and N on wiring board

XT

Voltage within 103.5~126.5V?

For 115V Units

Y

Switch off the power and wait 20 minutes;
or use DC voltmeter to measure the volt­age on the use DC voltmeter to measure
the voltage on the two ends of capacitor
(test3), until the voltage is lower than 20V

Check the

connection of reactor

(L in the Electrical

Wiring Diagram)

If the wiring of

reactor L is normal?

Y

Y

N

Fault with the
voltage testing
circuit on contr­ol panel AP1

Switch off the
power and repair
the supply power
to restore the volt-

N

age to 103.5~126.5
VVAC
Units

Connect the rea­ctor L according to
Electrical Wiring
Diagram

For 115V

Replace the
control panel
AP1

Re-energize
and switch
on the unit

N

Re-energize
and switch on
the unit

If the fault is
eliminated?

If the fault
is eliminated?

Y

Y

52

Replace the control

panel AP1

End

N

Troubleshooting

Mainly detect:

Whether the connection between control panel AP1 and compressor COMP is secure? Whether loose? Whether the connection

is in correct order?

Whether the voltage input of the machine is within normal range? (Use AC voltmeter to measure the voltage

between terminal L and N on the wiring board XT)

Whether the compressor coil resistance is normal? Whether the insulation of compressor coil against the copper tube

is in good condition?

Whether the working loads of the machine are too high? Whether the radiation is good?

Whether the charge volume of refrigerant is correct?

53

Troubleshooting

Energize and

switch on

IPM protection
occurs after the
machine has run for
a

p

eriod of time?

Use AC voltmeter
to measure the
voltage between
terminal L and N
on the wiring
board XT)

If the voltage
between terminal L
and N on wiring
board XT is within
210VAC~250VAC?

Check the supply
voltage and
restore it to
210VAC~250VAC

Voltage between
the two ends of
electrolytic
capacitor (test3) is
hi

g

her than 250V

Start and run the
unit. Before
protection occurs,
use DC voltmeter to
measure the voltage
between the two
ends of electrolytic
capacitor on control

p

anel AP1 (test3

)

If the unit can

work

normally?

Please confirm:

1. If the indoor and
outdoor heat
exchangers are
dirty? If they are
obstructed by other
objects which affect
the heat exchange
of indoor and
outdoor unit.

2. If the indoor and
outdoor fans are
working normally?

3. If the environment
temperature is too
high, resulting in
that the system
pressure is too high
and exceeds the
permissible range?

4. If the charge
volume of
refrigerant is too
much, resulting in
that the system
pressure is too
high?

5. Other conditions
resulting in that the
system pressure
becomes too high.

The connection
of capacitor C2
is loose.

Stop the unit and
disconnect the powe

r

supply. Then, check
the connection o

f

capacitor C2
according to Electrical
Wiring Diagram.

Reconnect the
capacitor C2 according
to Electrical Wiring
Diagram. Then,
energize and start the
unit.

Remove the wires
on the two ends o

f

capacitor C2. Then,
use capacitance
meter to measure
the capacitor C2.
Verify as per the
Parameters Sheet.

Stop the unit and
disconnect the power
supply. Wait 20 minutes,
or use DC voltmeter to
measure the voltage
between the two ends of
capacitor C2, until the
voltage is lower than 20V

If capacito

r

C2 is failed?

Replace the capacitor
C2. Then, energize
and start the unit.

Replace the

control panel AP1

Take corrective actions

according to Technical

Service Manual, and
then energize and start
the unit.

If there is any

abnormality

described above?

Refer to the
Electrical Wiring
Diagram and check
if the connection
between AP1 and
COMP is loose and i

f

the connection order
is correct.

Replace the

control panel AP1

If the connection
between AP1 and
COMP is unsecure
or the connection
order is wrong?

Connect the control panel

A

P1 and compressor
COMP correctly according
to the Electrical Wiring
Diagram. Then, energize
and start the unit.

Use ohmmeter to
measure the resistance
between the three
terminals on compressor
COMP, and compare the
measurements with the
compressor resistance on
Service Manual.

If the

resistance is

normal?

Use ohmmeter to
measure the resistance
between the two
terminals of compressor
COMP and copper tube.

Replace the

compressor

COMP

Resistance higher

than 500MΩ?

Replace the

control panel

AP1

END

Y N

Y

N

Y

If the unit can

work

normall

y

?

Y

If the unit can

work

normally?

Y

N

Y

N

If the unit can

work

normally?

Y

Y

N

N

If the unit can

work

normally?

Y

Y

N

N

N

Y

Fault diagnosis process:

54

55

Troubleshooting

AP1

End

Y

N

Y

N

Y

N

Overheat and high

temperature protection

Is outdoor ambient temperature higher than 53?

20 minutes after the complete

unit is powered off.

Is heat dissipation of the indoor unit

and outdoor unit abnormal?

Normal protection, please operate it after the

outdoor ambient temperature is normalized.

Improve the heat

dissipation environment

of the unit

Does the outdoor fan work normally?

1. Check if the fan terminal O FAN
is connected correctly

2. Resistance between any two
terminals is measure by an ohm
gauge and should be less than 1K
Ohm.

Replace the control panel

Replace the fan

capacitor C1

Replace the

outdoor fan

Mainly detect:

Is outdoor ambient temperature in normal range?

Are the outdoor and indoor fans operating normally?

Is the heat dissipation environment inside and outside the unit is good?

56

Troubleshooting

Y

N

Y

N

N

Y

Y

N

Power on the unit

Is stop time of the compressor

longer than 3 minutes?

Restart it up after 3 minutes

Does startup fail?

Are the wires for the compressor connected

correctly? Is connection sequence right?

Connect the wires as per the

connection diagram

Replace the control panel AP1

If the fault is eliminated?

Replace the

compressor

End

Mainly detect:

Whether the compressor wiring is connected correct?

Is time for compressor stopping enough?

Is compressor broken?

57

Out of step occurs once the

unit is powered on.

Is stop time of the

compressor longer than

3 minutes?

Are the wires for the compressor connected

correctly? Is connection sequence right?

Is the connection made in clockwise

direction?

Connect the

wires correctly

Replace the control

panel AP1

If the fault is eliminated?

Replace the
compressor

End

Out of step occurs in

operation

Is the outdoor fan working

normally?

Is the outdoor unit blocked

by foreign objects?

Replace the

control panel AP1

If the fault is eliminated?

Replace the

compressor

End

Check if the fan terminal

O FAN is connected correctly

Remove foreign objects

Replace the fan

capacitor C1

Replace the
outdoor fan

Troubleshooting

Mainly detect:

Whether the unit voltage is too high?

Whether the work voltage is too low?

58

20 minutes after the

complete unit is

powered off

Is the terminal FA for the

electronic expansion valve

connected correctly?

Connect the

wires correctly

Resistances between the first four pins
close to the terminal hole and the fifth
pin are almost the same, less than 100
ohm.

Replace the electronic

expansion valve

If the fault is eliminated?

If the fault is eliminated?

Replace the

control panel

AP1

Coolant leakage, refilling

the coolant

End

Troubleshooting

Mainly detect:

Whether the electronic expansion valve is connected well or not? Is electronic expansion valve damaged?

Is refrigerant leaked?

59

Troubleshooting

Y

Y

N

N

N

N

N

N

Y

Y

Y

Start

Check wiring of the
reactor (L) of the
outdoor unit and the
PFC capacitor

Whether there is any

damage or

short-circuit?

Replace it as per the
wiring diagram and

reconnect the wires

If the fault is eliminated?

Remove the PFC capacitor

and measure resistance

between the two terminals.

Is the resistance around zero?

The capacitor is

short circuited and

the capacitor
should be repla­ced

Restart the unit

If the fault is eliminated?

Disconnect the terminals for the
reactor and measure the resistance
between the two terminals of the

reactor by an ohm gauge

Whether there is any damage

or short-circuit?

Replace the reactor

Restart the unit

If the fault is eliminated?

Replace the control

panel AP1

End

Y

Mainly detect:

Check if the reactor (L) of the outdoor unit and the PFC capacitor are broken

The failure diagnosis process is as follows:

60

Y

N

Y

N

N

Y

N

N

Y

N

Y

N

Y

Y

Start

Did the equipment operate
normally before the failure

occurs?

The AP1 voltage
detection circuit
is at fault

Check wiring inside of
the indoor and outdoor

units

Are wires broken?

Check the communication
circuit of the outdoor unit

If the fault is eliminated?

The communication

circuit is abnormal

Replace the main board
of

the indoor unit

End

If the fault is eliminated?

Replace the main board

˄AP1˅of the outdoor unit

If the fault is eliminated?

Is the connection right?

Check the wiring of the indoor and

outdoor units with reference to the

wiring diagram

Correctly connect the

corresponding wires for

the indoor and outdoor

units with reference to

the wiring diagram

Troubleshooting

Mainly detect:

Detect the indoor and outdoor units connection wire and indoor and outdoor units inside wiring is connect

well or not, if is there any damage?

Is there any damage for the indoor unit mainboard communication circuit? Is communication circuit damaged?

The flow chart for malfunction detect:

61

Y

Y

Y

Y

Y

N

N

N

N

Start

Measure voltage at the
Test 10 position as
shown in the diagram
with a voltmeter

Value jumping

Measure voltage at the
Test 15 position as
shown in the diagram
with a voltmeter

Value jumping

Measure voltage at the
Test 11 position as
shown in the diagram
with a voltmeter

Value jumping

Measure voltage at the
Test 12 position as
shown in the diagram
with a voltmeter

Value jumping

The communication
circuit of the outdoor
unit is normal

End

Fault with

outdoor unit

Troubleshooting

62

Troubleshooting

(9) Flow chart for outdoor communitcation circuit detecting:

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YDULDEOH2WKHUZLVHLWPLJKWEHPDOIXQFWLRQRIPDLQERDUGRILQGRRUXQLWRUPDOIXQFWLRQRIPDLQERDUGRIRXWGRRUXQLWRU

ZURQJZLUHFRQQHFWLRQRILQGRRUDQGRXWGRRUXQLW3OHDVHHQVXUHWKDWWKHUHLVQRPDOIXQFWLRQRIPDLQERDUGRILQGRRUXQLWRU

ZURQJZLUHFRQQHFWLRQRILQGRRUDQGRXWGRRUXQLW$IWHUUHPRYLQJWKHPDOIXQFWLRQRILQGRRUXQLWUHPRYHWKHPDOIXQFWLRQRI

RXWGRRUXQLW

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YDULDEOH7HVW7HVWWKHYROWDJHRISLQDQGSLQRI8ZLWKXQLYHUVDOPHWHUYROWDJHRIERWKVLGHVRI57KH

YROWDJHVKRXOGEHYDULDEOH7HVW2WKHUZLVHWKHUHLVPDOIXQFWLRQRIPDLQERDUGRIRXWGRRUXQLW

7HVWWKHYROWDJHRISLQDQGSLQRI8ZLWKXQLYHUVDOPHWHUYROWDJHRIERWKVLGHVRI57KHYROWDJHVKRXOG

EHYDULDEOHWHVW7HVWWKHYROWDJHRISLQDQGSLQRI8ZLWKXQLYHUVDOPHWHUYROWDJHRIERWKVLGHVRI&7KH

YROWDJHVKRXOGEHYDULDEOHWHVW2WKHUZLVHWKHUHLVPDOIXQFWLRQRIPDLQERDUGRIRXWGRRUXQLW

7HVWWKHYROWDJHEHWZHHQSLQRI5ZKLWHDQGSLQRI87KHYROWDJHVKRXOGEHYDULDEOH7HVWYROWDJHEHWZHHQ

SLQRI5ZKLWHDQGSLQRI8ZLWKXQLYHUVDOPHWHU7KHYROWDJHVKRXOGEHYDULDEOH2WKHUZLVHWKHUHLVPDOIXQFWLRQRI

PDLQERDUGRIRXWGRRUXQLW

63

Troubleshooting Guide

Temp.

Resistan

ce

Temp.

Temp.

Resistance

Temp.

Resistance

Resistance

Appendix 1: form for indoor/outdoor unit's ambient sensor numerical value of resistance

Troubleshooting

(°F) (°F) (°F) (°F)

-2
0
1
3
5
7
9
10
12
14
16
18
19
21
23
25
27
28
30
32
34
36
37
39
41
43
45
46
48
50
52
54
55
57
59
61
63
64
66

68
70
72
73
75
77
79
81
82
84
86
88
90
91
93
95
97
99
100
102
104
106
108
109
111
113
115
117
118
120
122
124
126
127
130
131
133
135
136

138
140
142
144
145
147
149
151
153
154
156
158
160
162
163
165
167
169
171
172
174
176
178
180
181
183
185
187
189
190
192
194
196
198
199
202
203
205
207

208
210
212
214
216
217
219
221
223
225
226
228
230
232
234
235
237
239
241
243
244
246
248
250
252
253
255
257
259
261
262
264
266
268
270
271
273
275
277

64

Temp.

Resistance

Temp.

Temp.

Temp.

Resistance

Resistance

Resistance

Appendix 2: form for indoor/outdoor unit's tube temperature sensor numerical value of resistance

Troubleshooting

(°F) (°F) (°F) (°F)

-2
0
1
3
5
7
9
10
12
14
16
18
19
21
23
25
27
28
30
32
34
36
37
39
41
43
45
46
48
50
52
54
55
57
59
61
63
64
66

68
70
72
73
75
77
79
81
82
84
86
88
90
91
93
95
97
99
100
102
104
106
108
109
111
113
115
117
118
120
122
124
126
127
130
131
133
135
136

138
140
142
144
145
147
149
151
153
154
156
158
160
162
163
165
167
169
171
172
174
176
178
180
181
183
185
187
189
190
192
194
196
198
199
202
203
205
207

208
210
212
214
216
217
219
221
223
225
226
228
230
232
234
235
237
239
241
243
244
246
248
250
252
253
255
257
259
261
262
264
266
268
270
271
273
275
277

65

Troubleshooting Guide

Temp.

Resistance

Temp.

Temp.

Temp.

Resistance

Resistance

Resistance

Appendix 3: form for indoor/outdoor unit's air exhaust temperature sensor numerical value of resistance

Troubleshooting

(°F) (°F) (°F) (°F)

-2
0
1
3
5
7
9
10
12
14
16
18
19
21
23
25
27
28
30
32
34
36
37
39
41
43
45
46
48
50
52
54
55
57
59
61
63
64
66

68
70
72
73
75
77
79
81
82
84
86
88
90
91
93
95
97
99
100
102
104
106
108
109
111
113
115
117
118
120
122
124
126
127
130
131
133
135
136

138
140
142
144
145
147
149
151
153
154
156
158
160
162
163
165
167
169
171
172
174
176
178
180
181
183
185
187
189
190
192
194
196
198
199
202
203
205
207

208
210
212
214
216
217
219
221
223
225
226
228
230
232
234
235
237
239
241
243
244
246
248
250
252
253
255
257
259
261
262
264
266
268
270
271
273
275
277

66

9.5 2-way, 3-way Valve Appearance

2-way Valve (Liquid Side) 3-way Valve (Gas Side)

Shaft position Shaft position Service port

desolCdesolCdesolC

desolC

(with valve cap) (with valve cap) (with cap)

nepOdesolC

(clockwise)

desolCnepOnepO

(with valve cap) (with valve cap) (with cap)

nepOnepOdesolC

(clockwise) (counter-clockwise) (connected manifold

gauge)

nepOnepOnepO

(with charging

cylinder)

nepOnepOnepO

(with charging

cylinder)

nepO

nepO

nepOnepO

Works

Shipping

Air purging
(Installation)

Operation

Pumping down
(Transfering)

Evacuation
(Servicing)

Gas charging
(Servicing)

Pressure check
(Servicing)

Gas releasing
(Servicing)

1.

2.

3.

4.

5.

6.

Valve cap

Open position
Closed position

Pin

Service
port

Service
port cap

To outdoor unit

Flare nut

To
piping
connection

To outdoor unit

Hexagonal wrench (4mm)

Open position
Closed position

To
piping
connection

Flare nut

Open

(with charging cylinder)

Open

(with charging cylinder)

(with vacumm pump)

(clockwise)

Troubleshooting

67

Liquid side

Outdoor unit

3-way
valve

Gas side

Indoor unit

2-way
valve

Clsed

Clsed

Lo

Vacuum pump

CLOSE

OPEN

* Procedure

(1)Connect the charge hose from the manifold valve to the ser-

vice port of the gas side packed valve.

(2)Connect the charge hose to the port of the vacuum pump.

(3) Open fully the low pressure side handle of the gauge mani-

fold valve.

(4)Operate the vacuum pump to begin evacuating. Perform

evacuating for about 15 minutes if the piping length is 20 meters

(15 minutes for 20 meters) (assuming a pump capacity of 27

liters per minute). Confirm that the compound pressure gauge

reading is –101 kPa (–76 cmHg).

(5)Close the low pressure valve handle of gauge manifold.

– Check the flare connections for gas leakage.

(6)Use torque wrench to tighten the service port nut to a torque

of 1.8kg.cm.

(7)Set the 3-way valve to the back seat.

(8)Mount the valve stem nuts to the 2-way and 3-way valves.

(9)Check for gas leakage.

– At this time, especially check for gas leakage from the 2-way

and 3-way valve’s stem nuts, and from the service port nut.

CAUTION:

If gas leakage are discovered in step 5 above, take the

following mesures :

If the gas leaks stop when the piping connections are

tightened further, continue working from step 6. If the

ga s leaks do not stop when the connections a re

retightened, repair the location of the leak, discharge

all of the gas through the service port, and then recharge

with the specified amount of gas from a gas cylinder.

Troubleshooting

68

Lo

Closed

Purge the air

Outdoor unit

Indoor unit

Liquid side

Gas side

CLOSE

Open

2-Way
valve

3-Way
valve

CLOSE

• Procedure

(1) Confirm that both the 2-way and 3-way valves are set to

the open position.

– Remove the valve stem caps and confirm that the valve stems

are in the raised position.

– Be sure to use a hexagonal wrench to operate the valve stems.

(2) Operate the unit for 10 to 15 minutes.

(3) Stop operation and wait for 3 minutes, then connect the

charge set to the service port of the 3-way valve.

– Connect the charge hose with the push pin to the service port.

(4) Air purging of the charge hose.

– Open the low-pressure valve on the charge set slightly to air

purge from the charge hose.

(5) Set the 2-way valve to the closed position.

(6) Operate the air conditioner at the cooling cycle and stop it

when the gauge indicates 1kg/cm2g.

(7) Immediately set the 3-way valve to the closed position.

– Do this quickly so that the gauge ends up indicating 3 to 5kg/

cm

2

g.

(8) Disconnect the charge set, and mount the 2-way and 3-

way valve’s stem nuts and the service port nut.

– Use torque wrench to tighten the service port nut to a torque of

1.8 kg.m.

– Be sure to check for gas leakage.

Troubleshooting

69

Lo

Closed

OPEN

Closed

Gas cylinder

R410A

Outdoor unit

Indoor unit

Liquid side

Gas side

CLOSE

3-Way
valve

3-Way
valve

• Procedure

(1) Confirm that both the liquid side valve and the gas side

valve are set to the closed position.

(2) Connect the charge set and a gas cylinder to the service

port of the Gas side valve.

– Leave the valve on the gas cylinder closed.

(3) Air purging.

– Open the valves on the gas cylinder and the charge set. Purge

the air by loosening the flare nut on the liquid side valve ap-

proximately 45o or 3 seconds then closing it for 1 minute;repeat

3 times.

– After purging the air, use a torque wrench to tighten the flare

nut on liquid side valve.

(4) Check for gas leakage.

– Check the flare connections for gas leakage.

(5) Discharge the refrigerant.

– Close the valve on the gas cylinder and discharge the refriger-

ant until the gauge indicates 3 to 5 kg/cm2g.

(6) Disconnect the charge set and the gas cylinder, and set

the Liquid side and Gas side valves to the open position.

– Be sure to use a hexagonal wrench to operate the valve stems.

(8) Mount the valve stem nuts and the service port nut.

– Use torque wrench to tighten the service port nut to a torque of

1.8 kg.m.

– Be sure to check for gas leakage.

CAUTION: Do not leak the gas in the air during Air Purging.

Troubleshooting

70

Troubleshooting

Balance Refrigerant of the 3-way Valve

(Gas leakage)

• Procedure

(1) Confirm that both the 2-way and 3-way valves

are set to the back seat.

(2) Connect the charge set to the 3-way valve’s

port.

– Leave the valve on the charge set closed.
– Connect the charge hose to the service port.

(3) Open the valve (Lo side) on the charge set and

discharge the refrigerant until the gauge indi­cates 0 kg/cm

2

G.

– If there is no air in the refrigerant cycle (the

pressure when the air conditioner is not running
is higher than 1 kg/cm

2

G), discharge the refrig­erant until the gauge indicates 0.5 to 1
kg/cm

2

G. if this is the case, it will not be neces-

sary to apply a evacuatin.

– Discharge the refrigerant gradually; if it is dis-

charged too suddenly, the refrigeration oil will
also be discharged.

Lo

Open

Open

3-Way
valve

3-Way
valve

Gas side

CLOSEOPEN

Outdoor unit

Liquid side

Indoor unit

71

Troubleshooting

Evacuation

(All amount of refrigerant leaked)

• Procedure

(1) Connect the vacuum pump to the center hose

of charge set center hose

(2) Evacuation for approximately one hour.

– Confirm that the gauge needle has moved

toward -76 cmHg (vacuum of 4 mmHg or less).

(3) Close the valve (Lo side) on the charge set,

turn off the vacuum pump, and confirm that
the gauge needle does not move (approxima­tely 5 minutes after turning off the vacuum
pump).

(4) Disconnect the charge hose from the vacuum

pump.

– Vacuum pump oil.

If the vacuum pump oil becomes dirty or
depleted, replenish as needed.

Lo

Open

Open

Vacuum pump

3-Way
valve

Outdoor unit

Liquid side

Indoor unit

Gas side

3-Way
valve

CLOSE

OPEN

72

Troubleshooting

Gas Charging

(After Evacuation)

• Procedure

(1) Connect the charge hose to the charging

cylinder.

– Connect the charge hose which you dis-con-

nected from the vacuum pump to the valve at
the bottom of the cylinder.

– If you are using a gas cylinder, also use a

scale and reverse the cylinder so that the sys­tem can be charged with liquid.

(2) Purge the air from the charge hose.

– Open the valve at the bottom of the cylinder

and press the check valve on the charge set to
purge the air. (Be careful of the liquid refriger­ant). The procedure is the same if using a gas
cylinder.

(3) Open the valve (Lo side on the charge set and

charge the system with liquid refrigerant.

– If the system can not be charged with the spec-

ified amount of refrigerant, it can be charged
with a little at a time (approximately 150g each
time) while operating the air conditioner in the
cooling cycle; however, one time is not suffi­cient, wait approximately 1 minute and then
repeat the procedure (pumping down-pin).

(4) Immediately disconnect the charge hose from

the 3-way valve’s service port.

– Stopping partway will allow the gas to be dis-

charged.

– If the system has been charged with liquid

refrigerant while operating the air conditioner
turn off the air conditioner before disconnecting
the hose.

(5) Mount the valve stem nuts and the service

port nut.

– Use torque wrench to tighten the service port

nut to a torque of 1.8 kg.m.

– Be sure to check for gas leakage.

\

This is different from previous procedures.
Because you are charging with liquid refrigerant
from the gas side, absolutely do not attempt to
charge with larger amounts of liquid refrigerant
while operating the air conditioner.

Lo

Charging
cylinder

Outdoor unit

Indoor unit

Liquid side

Gas side

CLOSE

Open

3-Way
valve

3-Way
valve

OPEN

Open

Check valve

(1)

73

3. Remove electirc box cover

Unscrew the screw fixing the electric box cover to

remove it.

10. Removal Procedure

10.1 Removal Procedure of Indoor Unit

Warning Be sure to wait 10 minutes or more after turning

off all power supplies before disassembling work.

Removal Procedure

1. Remove front panel

Open the front panel and slightly pull it to remove it.

2. Remove guide louver

Push out the shaft sleeve and slightly bend the

guide louver to remove it.

filter

screw

front panel

guide louver

Image shown here is indicative only. Actual product

you receive may differ.

74

4. Remove front case

Unscrew the 6 tapping screws fixng the front panel

and turn the front case backward to remove it.

Removal Procedure

5. Remove electric box

Unscrew the 2 screws fixing the electric box

Pull out the wiring terminal of motor and then un-

screw the 3 screws fixing electric box.Lift the ele-

ctric box to remove it.

6. Remove evaporator

Unscrew the screws on the rear pipe cardplate

and then remove the cardplate.

temp. sensor

clasps

screw

clasp

screw

clasps

screws

75

Removal Procedure

7. Remove motor and cross flow fan

Unscrew the screws fixing the motor press plate

of motor and then the screws connecting the mo-

tor and cross flow fan to separate and remove

them.

screws

screw

screws

76

Removal Procedure

top cover

Cable Cross Plate sub-assy

cabinet

screws

front panel

screws

screws

1. Remove top cover and the Cable Cross Plate sub-

assy Unscrew the screw on the handle and pull the

Cable Cross Plate sub-assy forcibly downwards to re-

move it. Unscrew the 3 screws fixing the top cover to

remove it.

2. Remove cabinet

Unscrew the 4 screws fixing the cabinet to remove it.

3. Remove front panel

Unscrew the 5 screws fixing the front panel and

pull out the front panel to remove it.

10.2 Removal Procedure of Outdoor Unit

(If it's 108-230V, there are 6 screws need to be unscrewed
because there are one more power transformer.)

77

Removal Procedure

4. Remove electric box cover

Unscrew the 2 screws fixing the electiric box. Pull

theelectric box upwards and unplug the plug-in

line to remove the electric box.

5. Remove axial flow fan

Unscrew the nut and remove the washer fixing the

axial flow fan and then pull it out.

nut and washer

screws

axial flow fan

6.Remove 4-way valve

Wrap the 4-way valve with wet cloth and unsolder

the 4 weld spots of the 4-way valve to remove it.

weld spots

4-way valve

78

Removal Procedure

7. Remove electronic expannsion valve

Unsolder the weld spots of eletronic expansion

valve connecting with other pipelines to remove it.

8. Remove gas valve and liquid valve

Unscrew the 2 screws fixing the gas valve and

unsolder the weld spots of gas valve and suction

pipe to remove the gas valve.

Unscrew the 2 screws fixing the liquid valve and

unsolder the weld spots of liquid valve and suc-

tion pipe to remove the liquid valve.

screws

gas valve

electronic expannsion valve

liquid valve

9 . Remove compressor

Unsolder the 2 weld spots of the compressor and

unscrew the 3 feet nuts and remove the was-

heres fixing the compressor to remove it.

compressor foot

79

13

14

15

16

17

18

19

20

21

22

23

24

11

25

26

27

28

30

31

32

33

34

29

35

36

37

38

40

39

41

1

2

3

5

4

6

8

9

10

12

7

SPLIT TYPE ROOM AIR CONDITIONER - WALL MOUNTED

SYSTEM COMPONENTS

MW09C1H / MW12C1H Exploded Diagram

80

NO. FPN Part Description
1 69700100 Filter Sub-Assy
2 69700101 Front Case Sub-Assy
3 69700102 Front Case
4 69700103 Evaporator Assy
5 69700104 Evaporator Support
6 69700105 Guide Louver
7 69700106 Axile Bush (guide louver)
8 69700107 Rear Grill
9 69700108 Helicoid tongue
10 69700109 Air Louver 2
11 69700110 Air Louver 1
12 69700111 Left Axile Bush
13 69700112 Bearing cushion rubber base
14 69700113 O-Gasket sub-assy of Bearing
15 69700114 Cros

s Flow Fan
16 69700115 Water Tray Glue Plug
17 69700116 Wall Mounting Frame
18 69700117 MotorPressPlate
19 69700118 Pipe Clamp
20 69700119 Drainage Pipe
21 69700120 Cable Cross Plate
22 69700121 Rear Case assy
23 69700122 Fan Motor
24 69700123 Motor MP24AA
25 69700124 Crank
26 69700125 Display Board
27 69700126 Ambient Temperature Sensor
28 69700127 Transformer
29 69700128 Electric Box Assy
30 69700129 Electric Box
31 69700130 4-bit Terminal Bo

ard
32 69700131 Main Board
33 69700132 Jumping Connector
34 69700133 Tube Sensor (20K black)
35 69700134 Electric Box Cover1
36 69700135 Shield cover of Electric Box sub-assy
37 69700136 Remote Control
38 69700137 Electric Box Cover2
39 69700138 Screw Cover
40 69700139 Front panel D1
41 69700140 Front Panel Sub-Assy

MW09C1H Parts List

81

NO. FPN Part Description
1 69700100 Filter Sub-Assy
2 69700141 Front Case Sub-Assy
3 69700142 Front Case
4 69700103 Evaporator Assy
5 69700104 Evaporator Support
6 69700105 Guide Louver
7 69700106 Axile Bush (guide louver)

9 69700108 Helicoid tongue
10 69700109 Air Louver 2
11 69700110 Air Louver 1
12 69700111 Left Axile Bush
13 69700112 Bearing cushion rubber base
14 69700113 O-Gasket sub-assy of Bearing
15 69700114 Cross Flow Fan
16 6970011

5 Water Tray Glue Plug
17 69700116 Wall Mounting Frame
18 69700117 MotorPressPlate
19 69700118 Pipe Clamp
20 69700119 Drainage Pipe
21 69700120 Cable Cross Plate
22 69700121 Rear Case assy
23 69700122 Fan Motor
24 69700123 Motor MP24AA
25 69700124 Crank
26 69700125 Display Board
27 69700126 Ambient Temperature Sensor
28 69700127 Transformer
29 69700143 Electric Box Assy
30 69700129 Electric Box
31 69700130 4-bit Terminal Board
32 69700131 Main B

oard
33 69700144 Jumping Connector
34 69700133 Tube Sensor (20K black)
35 69700134 Electric Box Cover1
36 69700135 Shield cover of Electric Box sub-assy
37 69700145 Remote Controller
38 69700137 Electric Box Cover2
39 69700138 Screw Cover
40 69700139 Front panel D1
41 69700140 Front Panel Sub-Assy

MW12C1H Parts List

82

27

26

24

22

23

18

17

16 15

14

13

12

11

10

6

5

7

9

25

8

19

20

21

4

3

2

1

31

29

28

30

SPLIT TYPE ROOM AIR CONDITIONER - WALL MOUNTED

SYSTEM COMPONENTS

MR09C1H Exploded Diagram

83

NO. FPN Part Description
1 69700000 Mesh Enclosure
2 69700001 Cabinet
3 69700002 Axial-flow Fan
4 69700003 Motor FW30G-ZL
5 69700004 Reactor Support Assy
6 69700005 Choke Plug
7 69700006 Compressor Gasket
8 69700007 Compressor C-6RZ110H1A
9 69700008 Electric Expansion Valve Sub-Assy
10 69700009 Cut-off Valve (1/4)
11 69700010 Cut-off Valve (3/8)
12 69700011 Valve Support
13 69700012 Cable Cross Plate Assy
14 69700013 Right Side Plate Assy
15 69700014 Wire cover
16 69700015 Magnet Coil
17 69700016 Temperature Sensor for Discharge Gas
18 69700017 Tube Sensor (20K black)
19 69700018 Discharge Tube
20 69700019 Inhalation Tube
21 69700020 Overload Protector
22 69700021 Sensor
23 69700022 Rear Grill
24 69700023 Condenser Assy
25 69700024 Clapboard Sub-Assy
26 69700025 Top Cover Plate
27 69700026 Motor suport spot welding sub-assy
28 69700027 Electric box cover sub-assy
29 6970002

8 Main Board
30 69700029 Electric Box Assy
31 69700030 Terminal Board

MR09C1H Parts List

84

17

18

27

19

20

21

26

23

22

16

12

14

11

9

8

10

13

15

25

24

2

1

3

5

4

6

7

SPLIT TYPE ROOM AIR CONDITIONER - WALL MOUNTED

SYSTEM COMPONENTS

MR12C1H Exploded View

85

NO. FPN Part Description

1 69700000 Mesh Enclosure
2 69700031 Front Panel
3 69700002 Axial-flow Fan
4 69700003 Motor FW30G-ZL
5 69700017 Tube Sensor (20K black)
6 69700016 Temperature Sensor for Discharge Gas
7 69700021 Sensor
8 69700032 Motor suport spot welding sub-assy

9 69700033 Condenser Assy
10 69700019 Inhalation Tube
11 69700025 Top Cover Plate
12 69700034 Rear Grill
13 69700035 Discharge Tube
14 69700015 Magnet Coil
15 69700036 Right

Side Plate
16 69700011 Valve Support
17 69700027 Electric box cover sub-assy
18 69700029 Electric Box Assy
19 69700020 Overload Protector
20 69700006 Compressor Gasket
21 69700037 Drainage Plug
22 69700010 Cut-off Valve (3/8)
23 69700009 Cut-off Valve (1/4)
24 69700007 Compressor C-6RZ110H1A
25 69700038 Clapboard Sub-Assy
26 69700039 Chassis Sub-assy
27 69700028 Main Board

MR12C1H Parts List

86

FRIEDRICH AIR CONDITIONING CO.

10001 Reunion Place, Ste. 500, San Antonio, TX 78216
[phone] 877-599-5665 x 261 FAX [phone]
Email: [e-mail]
www.friedrich.com

Printed in the U.S.A.