Panasonic cs-me5rkua, cs-me7rkua service manual

Order No: PAPAMY1503085AE

/

TEMP

O

S

O
123

C

Indoor Unit

CS-ME5RKUA
CS-ME7RKUA

FAN

AUTO

SPEED

HEAT

AIR

COOL

SWING
DRY
FAN

AUTO

OFF/ON

FF/ON

ECONAVI

COMFORT

MODE

TEMP

AIRSWING

POWERFUL/

FANSPEED

QUIET

TIMER

TIMER

ET

ON

SET

123

CANCELONOFF

CANCEL

FF

AC RC

SETCHECK CLOCK RESET

HECK

Destination

USA

Canada

Please file and use this manual together with the service manual for Model No. CU-2E18NBU, CU-5E36QBU and CU-3E19RBU
CU-4E24RBU, Order No. PHAAM1111120A1, PAPAMY1312037CE and PAPAMY1505100CE.

WARNING

This service information is designed for experienced repair technicians only and is not designed for use by the general public.
It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product.
Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to
service or repair the products dealt with in this service information by anyone else could result in serious injury or death.

In order to avoid frostbite, be assured of no refrigerant leakage during the installation or repairing of refrigerant circuit.

PRECAUTION OF LOW TEMPERATURE

© Panasonic Corporation 2015.

TABLE OF CONTENTS

1. Safety Precautions ............................................. 3

2. Specification ....................................................... 5

3. Features ............................................................... 9

4. Location of Controls and Components .......... 10

4.1 Indoor Unit .................................................. 10

4.2 Outdoor Unit ............................................... 10

4.3 Remote Control .......................................... 10

5. Dimensions ....................................................... 11

5.1 Indoor Unit .................................................. 11

6. Wiring Connection Diagram ............................ 12

6.1 Indoor Unit .................................................. 12

7. Electronic Circuit Diagram .............................. 13

7.1 Indoor Unit .................................................. 13

8. Printed Circuit Board ....................................... 14

8.1 Indoor Unit .................................................. 14

9. Installation Instruction ..................................... 16

9.1 Select the Best Location ............................. 16

9.2 Indoor Unit .................................................. 17

14. Exploded View and Replacement Parts

List .....................................................................71

14.1 Indoor Unit ..................................................71

10. Operation Control ............................................. 21

10.1 Basic Function ............................................ 21

10.2 Cooling operation ....................................... 21

10.3 Soft Dry Operation ...................................... 21

10.4 Heating Operation ...................................... 21

10.5 Automatic Operation ................................... 22

10.6 Indoor Fan Speed Control .......................... 22

10.7 Indoor Fan Motor Operation ....................... 23

10.8 Outdoor Fan Motor Operation .................... 24

10.9 Airflow Direction .......................................... 24

10.10 Quiet Operation (Cooling Mode/Cooling

Area of Dry Mode) ...................................... 25

10.11 Quiet Operation (Heating) .......................... 25

10.12 Powerful Mode Operation ........................... 25

10.13 Timer Control .............................................. 26

10.14 Auto Restart Control ................................... 26

10.15 Indication Panel .......................................... 26

10.16 ECONAVI and AUTO COMFORT

Operation .................................................... 27

11. Servicing Mode ................................................. 30

11.1 Auto Off/On Button ..................................... 30

11.2 Remote Control Button ............................... 31

12. Troubleshooting Guide .................................... 32

12.1 Refrigeration Cycle System ........................ 32

12.2 Breakdown Self Diagnosis Function ........... 34

12.3 Error Code Table ........................................ 35

12.4 Self-diagnosis Method ................................ 37

13. Disassembly and Assembly Instructions ...... 67

13.1 Indoor Electronic Controllers,
Cross Flow Fan and Indoor Fan Motor

Removal Procedures .................................. 67

2

1. Safety Precautions

 Read the following “SAFETY PRECAUTIONS” carefully before perform any servicing.
 Electrical work must be installed or serviced by a licensed electrician. Be sure to use the correct rating of the

power plug and main circuit for the model installed.

 The caution items stated here must be followed because these important contents are related to safety. The

meaning of each indication used is as below. Incorrect installation or servicing due to ignoring of the instruction
will cause harm or damage, and the seriousness is classified by the following indications.

WARNING

CAUTION

 The items to be followed are classified by the symbols:

 Carry out test run to confirm that no abnormality occurs after the servicing. Then, explain to user the operation,

care and maintenance as stated in instructions. Please remind the customer to keep the operating instructions for
future reference.

Do not install outdoor unit near handrail of veranda. When installing air-conditioner unit on veranda of a high rise building, child may

1.
climb up to outdoor unit and cross over the handrail causing an accident.

Do not use unspecified cord, modified cord, joint cord or extension cord for power supply cord. Do not share the single outlet with

2.
other electrical appliances. Poor contact, poor insulation or over current will cause electrical shock or fire.

3. Do not tie up the power supply cord into a bundle by band. Abnormal temperature rise on power supply cord may happen.

4. Do not insert your fingers or other objects into the unit, high speed rotating fan may cause injury.

5. Do not sit or step on the unit, you may fall down accidentally.

6. Keep plastic bag (packaging material) away from small children, it may cling to nose and mouth and prevent breathing.

When installing or relocating air conditioner, do not let any substance other than the specified refrigerant, eg. air etc mix into

7.

refrigeration cycle (piping). Mixing of air etc. will cause abnormal high pressure in refrigeration cycle and result in explosion, injury
etc.

8. Do not add or replace refrigerant other than specified type. It may cause product damage, burst and injury etc.

For R410A model, use piping, flare nut and tools which is specified for R410A refrigerant. Using of existing (R22) piping, flare nut and tools
may cause abnormally high pressure in the refrigerant cycle (piping), and possibly result in explosion and injury.

9.
Thickness or copper pipes used with R410A must be more than 1/32" (0.8 mm). Never use copper pipes thinner than 1/32" (0.8 mm).

It is desirable that the amount of residual oil is less than 0.0008 oz/ft (40 mg/10 m).
Engage authorized dealer or specialist for installation. If installation done by the user is incorrect, it will cause water leakage, electrical

10.
shock or fire.

11. Install according to this installation instructions strictly. If installation is defective, it will cause water leakage, electrical shock or fire.

Use the attached accessories parts and specified parts for installation. Otherwise, it will cause the set to fall, water leakage, fire or electrical

12.
shock.

Install at a strong and firm location which is able to withstand weight of the set. If the strength is not enough or installation is not properly

13.
done, the set will drop and cause injury.

For installation work, follow all electrical, building, plumbing, local codes, regulations and these installation instructions. If electrical circuit

14.
capacity is not enough or a defect is found in electrical work, it will cause electrical shock or fire.

Do not use spliced wires for indoor / outdoor connection cable. Use the specified indoor / outdoor connection cable, refer to instruction

15.

INDOOR UNIT ELECTRICAL WIRING and connect tightly for indoor connection. Clamp the cable so that no external force will have impact
on the terminal. If connection or fixing is not perfect, it will cause heat-up or fi re at the connection.

Wire routing must be properly arranged so that control board cover is fixed properly. If control board cover is not fixed perfectly, it will cause

16.
fire or electrical shock.

This equipment must installed with an Earth Leakage Circuit Breaker (ELCB) or Ground Fault Current Interrupter (GFCI) or Appliance

17.

Leakage Current Interrupter (ALCI) that has been certified by an NRTL Certified Testing Agency and that is suitable for the voltages and
amperages involved. Otherwise, if may cause electrical shock and fire in case of equipment breakdown.

During installation, install the refrigerant piping properly before running the compressor. Operation of compressor without fixing refrigeration

18.

piping and valves at opened position will cause suck-in of air, abnormal high pressure in refrigeration cycle and result in explosion, injury
etc.

During pump down operation, stop the compressor before removing the refrigeration piping. Removal of refrigeration piping while

19.

compressor is operating and valves are opened will cause suck-in of air, abnormal high pressure in refrigeration cycle and result in
explosion, injury etc.

Tighten the flare nut with torque wrench according to specified method. If the flare nut is over-tightened, after a long period, the flare may

20.
break and cause refrigerant gas leakage.

This indication shows the possibility of causing death or serious injury

This indication shows the possibility of causing injury or damage to properties.

This symbol denotes item that is PROHIBITED from doing.

WARNING

3

After completion of installation, confirm there is no leakage of refrigerant gas. It may generate toxic gas when the refrigerant contacts with

21.
fire.

22. Ventilate if there is refrigerant gas leakage during operation. It may cause toxic gas when the refrigerant contacts with fire.

This equipment must be properly earthed. Earth line must not be connected to gas pipe, water pipe, earth of lightning rod and telephone.

23.
Otherwise, it may cause electrical shock in case of equipment breakdown or insulation breakdown.

WARNING

CAUTION

Do not install the unit in a place where leakage of flammable gas may occur. In case gas leaks and accumulates at surrounding of

1.
the unit, it may cause fire.

Do not release refrigerant during piping work for installation, re-installation and during repairing refrigeration parts. Take care of the

2.
liquid refrigerant, it may cause frostbite.

3. Do not install this appliance in a laundry room or other location where water may drip from the ceiling, etc.

4. Do not touch the sharp aluminium fin, sharp parts may cause injury.

Carry out drainage piping as mentioned in installation instructions. If drainage is not perfect, water may enter the room and damage the

5.
furniture.

6. Select an installation location which is easy for maintenance.

Installation work.

7.
It may need two people to carry out the installation work.

4

2. Specification

Model

Performance Test Condition AHRI AHRI

Power Supply

Min. Mid. Max. Min. Mid. Max. Min. Mid. Max. Min. Mid. Max.

Capacity

Running Current A - 2.3 - - 2.0 - - 2.8 - - 2.5 -

Input Power W 250 400 640 250 400 640 340 500 810 340 500 810

Cooling

Heating

Indoor Fan

Speed

Moisture Removal L/h (Pt/h) 0.3 (0.6) 0.4 (0.8)

Indoor

Airflow

Dimension

Weight Net (I/D) kg (lb) 9 (20) 9 (20)

Pipe Diameter (Liquid / Gas) mm (inch) 6.35 (1/4) / 9.52 (3/8) 6.35 (1/4) / 9.52 (3/8)

Drain Hose

EER

Indoor Noise (H / L)

Capacity

Running Current A - 3.4 - - 3.0 - - 4.1 - - 3.7 -

Input Power W 300 600 960 300 600 960 300 740 1.23k 300 740 1.23k

COP

Indoor Noise (H / L)

Type Cross-flow fan Cross-flow fan

Material ASG20K1 ASG20K1

Motor Type DC (8 poles) DC (8 poles)

Input Power W 47.0 - 47.0 47.0 - 47.0

Output Power W 40 40

QLo rpm

Lo rpm

Me rpm

Hi rpm

SHi rpm

QLo m

Lo m3/min (ft3/min)

Me m3/min (ft3/min)

Hi m3/min (ft3/min)

SHi m3/min (ft3/min)

Height (I/D) mm (inch) 290 (11-7/16) 290 (11-7/16)

Width (I/D) mm (inch) 870 (34-9/32) 870 (34-9/32)

Depth (I/D) mm (inch) 214 (8-7/16) 214 (8-7/16)

Inner Diameter mm (inch) 16.7 (5/8) 16.7 (5/8)

Length mm (inch) 650 (25-5/8) 650 (25-5/8)

Indoor CS-ME5RKUA CS-ME7RKUA

Outdoor CU-3E19RBU CU-3E19RBU

Phase, Hz Single, 60 Single, 60

V 208 230 208 230

kW 1.30 1.62 2.30 1.30 1.62 2.30 1.80 2.01 2.90 1.80 2.01 2.90

BTU/h 4400 5500 7800 4400 5500 7800 6100 6900 9900 6100 6900 9900

W/W 5.20 4.05 3.59 5.20 4.05 5.20 5.29 4.02 3.58 5.29 4.02 3.58

Btu/hW 17.60 13.75 12.20 17.60 13.75 12.20 17.95 13.80 12.20 17.95 13.80 12.20

dB-A 38 / 25 38 / 25 39 / 25 39 / 25

Power Level dB 54 / - 54 / - 55 / - 55 / -

kW 1.20 2.61 3.20 1.20 2.61 3.20 1.20 3.21 4.10 1.20 3.21 4.10

BTU/h 4100 8900 10900 4100 8900 10900 4100 10900 14000 4100 10900 14000

W/W 4.00 4.35 3.33 4.00 4.35 3.33 4.00 4.34 3.33 4.00 4.34 3.33

Btu/hW 13.65 14.85 11.35 13.65 14.85 11.35 13.65 14.75 11.40 13.65 14.75 11.40

dB-A 40 / 29 40 / 29 41 / 29 41 / 29

Power Level dB 56 / - 56 / - 57 / - 57 / -

3

/min (ft3/min)

Cooling : 570
Heating : 690
Cooling : 660
Heating : 780
Cooling : 820
Heating : 950

Cooling : 990
Heating : 1120
Cooling : 1080
Heating : 1210

Cooling : 6.00 (212)
Heating : 6.88 (243)
Cooling : 7.00 (247)
Heating : 7.89 (279)
Cooling : 8.80 (311)

Heating : 9.79 (346)
Cooling : 10.70 (380)
Heating : 11.70 (415)
Cooling : 11.71 (413)
Heating : 12.70 (448)

Cooling : 570
Heating : 690
Cooling : 660
Heating : 780
Cooling : 840

Heating : 960
Cooling : 1020
Heating : 1150
Cooling : 1100
Heating : 1240

Cooling : 6.06 (214)
Heating : 6.95 (245)
Cooling : 7.06 (249)
Heating : 7.96 (281)
Cooling : 9.08 (321)

Heating : 9.97 (352)
Cooling : 11.10 (390)
Heating : 12.10 (425)
Cooling : 12.10 (425)
Heating : 13.11 (463)

5

Model

Fin Material Aluminium (Pre Coat) Aluminium (Pre Coat)

Indoor Heat

Exchanger

Air Filter

Indoor Operation Range

(Cooling) (°F / °C)

Indoor Operation Range

(Heating) (°F / °C)

1. Cooling capacities are based on indoor temperature of 27°C DRY BULB (80.6°F DRY BULB), 19.0°C WET BULB (66°F WET BULB) and
outdoor air temperature of 35°C DRY BULB (95°F DRY BULB), 24°C WET BULB (75.2°F WET BULB)

2. Heating capacities are based on indoor temperature of 20°C Dry Bulb (68°F Dry Bulb) and outdoor air temperature of 7°C Dry Bulb (44.6°F
Dry Bulb), 6°C Wet Bulb (42.8°F Wet Bulb)

3. Specifications are subjected to change without prior notice for further improvement.

Fin Type Slit Fin Slit Fin

Row x Stage x FPI 2 x 15 x 21 2 x 15 x 21

Size (W x H x L) inch 1 x 12-13/32 x 24 1 x 12-13/32 x 24

Material Polypropelene Polypropelene

Type One-touch One-touch

DRY BULB WET BULB DRY BULB WET BULB

Indoor CS-ME5RKUA CS-ME7RKUA

Outdoor CU-3E19RBU CU-3E19RBU

Maximum 89.6 / 32 73.4 / 23 89.6 / 32 73.4 / 23

Minimum 60.8 / 16 51.8 / 11 60.8 / 16 51.8 / 11

Maximum 86.0 / 30 - / - 86.0 / 30 - / -

Minimum 60.8 / 16 - / - 60.8 / 16 - / -

6

Model

Performance Test Condition AHRI AHRI

Power Supply

Min. Mid. Max. Min. Mid. Max. Min. Mid. Max. Min. Mid. Max.

Capacity

Running Current A - 2.8 - - 2.5 - - 2.8 - - 2.5 -

Input Power W 340 500 810 340 500 810 340 500 810 340 500 810

Cooling

Heating

Indoor Fan

Speed

Moisture Removal L/h (Pt/h) 0.4 (0.8) 0.4 (0.8)

Indoor

Airflow

Dimension

Weight Net (I/D) kg (lb) 9 (20) 9 (20)

Pipe Diameter (Liquid / Gas) mm (inch) 6.35 (1/4) / 9.52 (3/8) 6.35 (1/4) / 9.52 (3/8)

Drain Hose

EER

Indoor Noise (H / L)

Capacity

Running Current A - 4.1 - - 3.7 - - 4.1 - - 3.27 -

Input Power W 300 740 1.23k 300 740 1.23k 300 740 1.23k 300 740 1.23k

COP

Indoor Noise (H / L)

Type Cross-flow fan Cross-flow fan

Material ASG20K1 ASG20K1

Motor Type DC (8 poles) DC (8 poles)

Input Power W 47.0 - 47.0 47.0 - 47.0

Output Power W 40 40

QLo rpm

Lo rpm

Me rpm

Hi rpm

SHi rpm

QLo m

Lo m3/min (ft3/min)

Me m3/min (ft3/min)

Hi m3/min (ft3/min)

SHi m3/min (ft3/min)

Height (I/D) mm (inch) 290 (11-7/16) 290 (11-7/16)

Width (I/D) mm (inch) 870 (34-9/32) 870 (34-9/32)

Depth (I/D) mm (inch) 214 (8-7/16) 214 (8-7/16)

Inner Diameter mm (inch) 16.7 (5/8) 16.7 (5/8)

Length mm (inch) 650 (25-5/8) 650 (25-5/8)

Indoor CS-ME7RKUA CS-ME7RKUA

Outdoor CU-2E18NBU CU-5E36QBU

Phase, Hz Single, 60 Single, 60

V 208 230 208 230

kW 1.80 2.01 2.90 1.80 2.01 2.90 1.80 2.01 2.90 1.80 2.01 2.90

BTU/h 6100 6900 9900 6100 6900 4900 6100 6900 9900 6100 6900 9900

W/W 5.29 4.02 3.58 5.29 4.02 3.58 5.29 4.02 3.58 5.29 4.02 3.58

Btu/hW 17.95 13.80 12.20 17.95 13.80 12.20 17.95 13.80 12.20 17.95 13.80 12.20

dB-A 39 / 25 39 / 25 39 / 25 39 / 25

Power Level dB 55 / - 55 / - 55 / - 55 / -

kW 1.20 3.21 4.10 1.20 3.21 4.10 1.20 3.21 4.10 1.20 3.21 4.10

BTU/h 4100 10900 14000 4100 10900 14000 4100 10900 14000 4100 10900 14000

W/W 4.00 4.34 3.33 4.00 4.34 3.33 4.00 4.34 3.33 4.00 4.34 3.33

Btu/hW 13.65 14.75 11.40 13.65 14.75 11.40 13.65 14.75 11.40 13.65 14.75 11.40

dB-A 41 / 29 41 / 29 41 / 29 41 / 29

Power Level dB 57 / - 57 / - 57 / - 57 / -

3

/min (ft3/min)

Cooling : 570
Heating : 690
Cooling : 660
Heating : 780
Cooling : 840

Heating : 960
Cooling : 1020
Heating : 1150
Cooling : 1100
Heating : 1240

Cooling : 6.06 (214)
Heating : 6.95 (245)
Cooling : 7.06 (249)
Heating : 7.96 (281)
Cooling : 9.08 (321)

Heating : 9.97 (352)
Cooling : 11.10 (390)
Heating : 12.10 (425)
Cooling : 12.10 (425)
Heating : 13.11 (463)

Cooling : 570
Heating : 690
Cooling : 660
Heating : 780
Cooling : 840

Heating : 960
Cooling : 1020
Heating : 1150
Cooling : 1100
Heating : 1240

Cooling : 6.06 (214)
Heating : 6.95 (245)
Cooling : 7.06 (249)
Heating : 7.96 (281)
Cooling : 9.08 (321)

Heating : 9.97 (352)
Cooling : 11.10 (390)
Heating : 12.10 (425)
Cooling : 12.10 (425)
Heating : 13.11 (463)

7

Model

Fin Material Aluminium (Pre Coat) Aluminium (Pre Coat)

Indoor Heat

Exchanger

Air Filter

Indoor Operation Range

(Cooling) (°F / °C)

Indoor Operation Range

(Heating) (°F / °C)

1. Cooling capacities are based on indoor temperature of 27°C DRY BULB (80.6°F DRY BULB), 19.0°C WET BULB (66°F WET BULB) and
outdoor air temperature of 35°C DRY BULB (95°F DRY BULB), 24°C WET BULB (75.2°F WET BULB)

2. Heating capacities are based on indoor temperature of 20°C Dry Bulb (68°F Dry Bulb) and outdoor air temperature of 7°C Dry Bulb (44.6°F
Dry Bulb), 6°C Wet Bulb (42.8°F Wet Bulb)

3. Specifications are subjected to change without prior notice for further improvement.

Fin Type Slit Fin Slit Fin

Row x Stage x FPI 2 x 15 x 21 2 x 15 x 21

Size (W x H x L) inch 1 x 12-13/32 x 24 1 x 12-13/32 x 24

Material Polypropelene Polypropelene

Type One-touch One-touch

DRY BULB WET BULB DRY BULB WET BULB

Indoor CS-ME7RKUA CS-ME7RKUA

Outdoor CU-2E18NBU CU-5E36QBU

Maximum 89.6 / 32 73.4 / 23 89.6 / 32 73.4 / 23

Minimum 60.8 / 16 51.8 / 11 60.8 / 16 51.8 / 11

Maximum 86.0 / 30 - / - 86.0 / 30 - / -

Minimum 60.8 / 16 - / - 60.8 / 16 - / -

8

3. Features

 Inverter Technology

o Wider output power range
o Energy saving
o Quick Cooling
o More precise temperature control

 Environment Protection

o Non-ozone depletion substances refrigerant (R410A)

 Long Installation Piping

o Long piping up to 82 feet (25 meters) for 1 room, 164 feet (50 meters) for total room

 Easy to use remote control

 Quality Improvement

o Random auto restart after power failure for safety restart operation
o Gas leakage protection
o Prevent compressor reverse cycle
o Inner protector to protect Compressor
o Noise prevention during soft dry operation

 Operation Improvement

o Quiet mode to reduce the indoor unit operating sound
o Powerful mode to reach the desired room temperature quickly

 Serviceability Improvement

o Breakdown Self Diagnosis function

9

4. Location of Controls and Components

Alu

miniu

mFin

A

TEMP

O

O

N

TIMER

S

CANCEL

O

N

O

2

CHEC

K

4.1 Indoor Unit

Front Panel

Air Filters

Human activity

sensor

Horizontal Airflow
Direction Louver

• Manually adjustable.

4.2 Outdoor Unit

ir inlet (side)

Air inlet (rear)

R
E

W
O
P

R
E
M

I
T

I

V

A

N

O
C
E

T

R
O
F

M

O

C

O
T
U

A

L
U

F

R

E

W

O
P

T
E

I

U

Q

Remote control
receiver and Indicator

Vertical Airflow
Direction Louver

• Do not adjust by hand.

Auto OFF/ON button

Air Purifying Filter

INDICATOR

POWER

TIMER

ECONAVI

AUTO COMFO RT

POWERFUL

QUIET

(Green)
(Orange)
(Green)
(Green)
(Orange)
(Orange)

4.3 Remote Control

Remote control

Econavi operation

Operation mode

Temperature setting

Powerful/Sleep mode

display

operation

Check

AUTO

HEAT

COOL

DRY

FAN

OFF/ON

FF/

ECONAVI

MODE

TEMP

POWERFUL/

FAN SPEED

QUIET

TIMER

ON

1

2

OFF

FF

SET CHECK CLOCK RESET

AUTO

COMFORT

AIR SWING

CANCEL

AC

FAN
SPEED

AIR
SWING

ET

SET

3

RC

Air outlet

OFF/ON

Auto comfort operation

Vertical airflow
direction selection

Fan speed selection

Timer setting

Clock setting

10

5. Dimensions

/

TEM

O

S
CANC

O
OFF1

3

CHEC

K

5.1 Indoor Unit

<Side View> <Side View>

Air intake
direction

<Top View>

<Front View>

(8-7/16)

8-7/16

Left piping
hole

Air outlet
direction

1/32~1/16

<Bottom View>

4-29/32

<Rear View>

16-1/8

34-9/32

Gas s ide

Liquid si de

2-11/322-11/32

(1-5/8~2-13/32)

1/32~1/16

4-17/32

11- 7/ 16

Right piping
hole

Remote control

1-7/8

FAN

AUTO

SPEED

HEAT

AIR

COOL

SWING
DRY
FAN

AUTO

OFF/ON

FF/ON

ECONAVI

COMFORT

MODE

TEMP

P

AIRSWING

POWERFUL/

QUIET

FANSPEED

5-1/4

TIMER

TIMER

ET

N

SET

3

2

12

EL

CANCELONOFF

AC RC

SETC HECKCLOC K RESET

Remote control holder

2-3/8

2

2-13/32

1-49/64

7/8

Installation
plate

Indoor unit
external
dimensions
line

Relative position between the indoor unit and the installation plate <Front View>

29-29/64

1717-9/32

5-1/16

Right
piping
hole

Left
piping
hole

5-1/16

3-3/4

1-11/16

9-17/32 9-17/32

11

5/8

10-3/8

Unit: inch

6. Wiring Connection Diagram

6.1 Indoor Unit

TERMINAL

TO
OUTDOOR
UNIT

BOARD

TEMP.
FUSE
102°C
(3A)

GROUNDING
TERMINAL

EVAPORATOR

1

2

3

Y/G

BL

W

R

AC306 (BLK)

AC303 (WHT)

AC304 (RED)

G301 (GRN)

G

FUSE301

T3.15A L250V

COMMUNICATION

CIRCUIT

NOISE FILTER

RECTIFICATION

AUTO SW

(SW01)

CIRCUIT

CIRCUIT

REMARKS

4

(WHT)

1

CN–RMT

5

(WHT)

CN–CNT

1

1

(WHT)

CN–STM1

5

6

(RED)

CN–TH

1

BR

R
O
Y
P

t

t

t

1

5

PIPING TEMP. SENSOR 2
(THERMISTOR)

PIPING TEMP. SENSOR 1
(THERMISTOR)

SUCTION TEM P. SENSOR
(THERMISTOR)

B : BLUE P : PINK
BR : BROWN O : ORANGE
BL : BLAC K Y : YELLOW
W : WHITE G : GREEN
R : RED
Y/G : YELLOW/GREEN

UP DOWN

M

LOUVER MOTOR

FAN MOTOR

M

Y

7

B

6

W

5

BL

4

R

1

CONTROLLER

CN–FM (WHT)

(MAIN)

CN–DISP (YLW)

1

WWWWWWWWW

11

CN–DISP (WHT)

ELECTRONIC CONTROLLER

(DISPLAY & RECEIVER)

REMOTE CONTROLLER

12

1

ELECTRONIC

W

3

1

(WHT)

CN–MSENS

1

W
W

W

1

(WHT)

CN–MSENS

8

CN-SENS1

(COMPARATOR)

ELECTRONIC CONTROLLER

1

3

CN–SENS1

ELECTRONIC
CONTROLLER

(YLW)

(ECO SENSOR)

W
W

(WHT)

3

12

7. Electronic Circuit Diagram

TEMP

OFF/O

N

TIMER

S

CANCEL

O

N

O

2

3

C

T

7.1 Indoor Unit

O
OUTDOOR
UNIT

TERMINAL
BOARD

1
2
3

TEMP.
FUSE
102°C
(3A)

GROUNDING
TERMINAL

Y/G

EVAPORATOR

FAN MOTOR

M

AC306 (BLK)

BL

R

AC303 (WHT)

W

FUSE301

T3.15A L250V

AC304 (RED)

G301 (GRN)

G

COMMUNICATION

7
6
5

4

1

CN–FM ( WHT)

ELECTRONIC

CONTROLLER

(MAIN)

Y
B
W

BL

R

CIRCUIT

AUTO SW

(SW01)

NOISE FILTER

CIRCUIT

RECTIFICATION

CIRCUIT

R62

15.0k

C52

1000p

5V

R90

10k

C25

1u

R82
10k

1000p

C51

20.0k

R61

*R54

270

*C56 *C57

12V

VCC

9

1

16

IC03

2

15

IC03

3

14

IC03

4

13

IC03

5

12

IC03

6

11

IC03

7

10

IC03

GND

8

C27

*R63

1u

5V

*R37

10k

*C45

5V

0.1u

4

1

*C49

CN–RMT

NONE

(WHT)

5V12V

*L5*L6

5

1

CN–CNT

(WHT)

CN–STM1

12V

(WHT)

1

BR

1

R
O
Y
P

5

5V

6

R46R47

1

CN–TH

(RED)

*C28

PIPING TEMP. SENSOR 2

t

(THERMISTOR)
PIPING TEMP. SENSOR 1

t

(THERMISTOR)
SUCTION TEMP. SENSOR

t

(THERMISTOR)

M

5

UP DOWN
LOUVER MOTOR

ELECTRONIC CONTROLLER

(DISPLAY & RECEIVER)

IC201

R213

R208

GND-A

45

JP201R210

JP200R211

JP203R212

JP204

Vout

Vcc

GND

GNDGND

+

C201

47u

c

e

R209

1
2
3

C202

0.01u

R218

0

SEN201

PCB3

LED205

2

POWERFUL/QUIET

(orange/green)

5V_

47

3

1

CN–DISP ( YLW)

CN–DISP (WHT)

POWER

(green)

LED201

TIMER

(orange)

LED202

ECO NAVI

(green)

LED203

NANOE G/AUTO COMF

(green)

LED204

R207

620

R206

2.7k

5V

R89

1

WWWWWWWW W

11

BZ201

BZ

R201 470

R202

2k

R203

27k

R204

820

R216

0

b

4.7k

R217

0

b

4.7k

Q201

10k

Q202

10k

5V

*R74

*R75

*C41

C3

0.1u

CN–MSENS

(WHT)

3

W
W
W

1

12

1

12V

R215

0

5V_

e

c

5V_

e

c

REMOTE CONTR OLLER

DRY

FAN

OFF/ON

ECONAVI

MODE

TEMP

FAN SPEED

QUIET

TIMER

ON

12

FF

OFF

SET CHECK CLOCK RESET

HECK

COMFORT

AIRSWING

CANCEL

AC

FAN
SPEED

AIR
SWING

AUTO

ET

SET

3

RC

AUTO

HEAT

COOL

POWERFUL/

S

M

–

S

E

N

N

C

5V_3

)

H

(

T

W

1

8

ELECTRONIC CONTROLLER

(COMPARATOR)

R401

R402

R403

5V_3

C403

6

7

IC401

5

2

8

1

IC401

3

4

W

1

1

ELECTRONIC

W
W

3

CN–SENS1

CONTROLLER

(YLW)

(ECO SENSOR)

(WHT)

3

CN-SENS1

13

8. Printed Circuit Board

JP1(Ran

dom

R

e

e

nable/d

e

)

8.1 Indoor Unit

8.1.1 Main Printed Circuit Board

CN-FM

CN-CNT
CN-RMT

Auto

start

isabl

8.1.2 Indicator Printed Circuit Board

CN-STM1

CN-MSENS

CN-DISP

CN-TH

CN-DISP

14

8.1.3 Comparator Printed Circuit Board

CN-SENS1

CN-SENS2

CN-MSENS

15

9. Installation Instruction

9.1 Select the Best Location

9.1.1 Indoor Unit

 Do not install the unit in excessive oil fume area

such as kitchen, workshop and etc.

 There should not be any heat source or steam

near the unit.

 There should not be any obstacles blocking the air

circulation.

 A place where air circulation in the room is good.
 A place where drainage can be easily done.
 A place where noise prevention is taken into

consideration.

 Do not install the unit near the door way.
 Ensure the spaces indicated by arrows from the

wall, ceiling, fence or other obstacles.

 Mount with the lowest moving parts at least 8 ft

(2.4 mm) above floor or grade level.

9.1.2 Indoor/Outdoor Unit Installation
Diagram

Piping dir ection

Right
Rear

Right
bottom

31

1

/

32

"

(50 mm) or

more

Insulation of piping connections

• C arry out insulation after
checking for gas leaks and
secure wit h vinyl tape.

Attaching the remote control holder to the wall

Remote control holder fixing screws

Remote
control

3

It is advisable to avoid more than 2 blockage
directions. For better ventilation & multiple­outdoor installation,please consult authorized
dealer/specialist.

• T his illustration is for explanation purposes only.
The indoor unit will actually face a different way.

• R espective outdoor unit installation procedure shall
refer to instruction manual provided in the outdoor
unit packaging.

(Front side)

Left
Rear

Left bottom

(Left and right are identical)

Floor / Grade level

Remote control ho lder

Left

9

Vinyl tape

6

Attention no t to bend
up drain hose

)

e

"

r

m

6

o

1

m

/

m

5

r

6

2

o

(

5

Installation par ts you
should purchase ()

Installation p late 1

Bushing-Sleeve (

Sleeve (

Putty (

)
m

e
r

4

o

.
2

m

(

r

t

f

o

8

(Gum Type Sealer)

Bendthepipeas
closely o n the wall as
possible, but be careful
that it doesn’t break.

Vinyl tape (wide) (

• Apply after carrying
out a drainage test.

• To carry out the
drainage test,
remove the air filters
and pour water into
the heat exchanger.

Saddle (





)



)



)

)



)

16

9.2 Indoor Unit

W

9.2.1 How to Fix Installation Plate

The mounting wall shall be strong and solid enough to prevent it from the vibration.

Measuring

T ape

Wal l

917/32"

(241.5 mm )

51/16"

(128 mm)

More than 1

PIPE HOL E CENTER

DISTANCE

TO PIPE

HOLE
CENTER
128 mm

2

screw

51/16"

(128 mm)

Installation plate

For best strength of
INDOOR unit installation,
it is highly recommended
to locate “
as shown.

all

More

than 2

1

”at5position

DISTANCETO
PIPE HOLE
CENTER 128 mm

More than 1

PIPE HOLE

CENTER

917/32"

(241.5 mm )

51/16"

(128 mm)

Wal l

Dimension

179/32"

(439 mm)

17"

(432 mm)

111/16"

(43 mm)

ME7***

Model

123 456

or

199/32"

(490 mm)

37/32"

(82 mm)

The center of installation plate should be at more than  at right and left of the wall.
The distance from installation plate edge to ceiling should more than .
From installation plate center to unit’s left side is .
From installation plate center to unit’s right side is .

B : For left side piping, piping connection for liquid should be about  from this line.

○

: For left side piping, piping connection for gas should be about  from this line.

1 Mount the installation plate on the wall with 5 screws or more (at least 5 screws).

(If mounting the unit on the concrete wall, consider using anchor bolts.)
o Always mount the installation plate horizontally by aligning the marking-off line with the thread and using

a level gauge.

2 Drill the piping plate hole with ø2 3/4" (ø70 mm) hole-core drill.

o Line according to the left and right side of the installation plate. The meeting point of the extended line is

the center of the hole. Another method is by putting measuring tape at position as shown in the diagram
above. The hole center is obtained by measuring the distance namely 5 1/16" (128 mm) for left and right
hole respectively.

o Drill the piping hole at either the right or the left and the hole should be slightly slanting to the outdoor

side.

9.2.2 To Drill a Hole in the Wall and
Install a Sleeve of Piping

1 Insert the piping sleeve to the hole.
2 Fix the bushing to the sleeve.

Wall

Indoor

3 Cut the sleeve until it extrudes about 19/32"

(15 mm) from the wall.

CAUTION

When the wall is hollow, please be sure
to use the sleeve for tube assembly to
prevent dangers caused by mice biting
the connection cable.

Sleeve for
tube
assembly

4 Finish by sealing the sleeve with putty or

caulking compound at the final stage.

3

/4"(ø70mm)

ø2
through hole

33/4"

(95 mm)

Outdoor

19

Putty or caulking compound

/32" (15 mm)

Approx.

Bushing for tube
assembly

7

/32" -9/32"

(5-7 mm )

17

9.2.3 Indoor Unit Installation

Do n ot tu rn over the unit without it’s shock absorber du ring pull out the piping.

It may cause intake grille damage.

Use shock absorber during pull out the piping to p rotect the intake grille from damage.

p

u

l

l

o

u

t

t

h

e

p

i

p

i

n

g

Piping

Piping

p

u

l

l

o

u

t

t

h

e

p

i

p

i

n

g

PUSH PUSH

Intake grille

9.2.3.1 For the right rear piping

Step-1

Step-2

Step-3

Step-4

Pull out the Indoor piping

Install the Indoor Unit

Secure the Indoor Unit

Insert the connection cable

9.2.3.2 For the right bottom piping

Step-1

Step-2

Step-3

Step-4

Pull out the Indoor piping

Install the Indoor Unit

Insert the connection cable

Secure the Indoor Unit

9.2.3.3 For the embedded piping

Step-1

Step-2

Step-3

Step-4

Step-5

Step-6

Step-7

Step-8

Replace the drain hose

Bend the embedded piping

• Use a spring bender or equivalent to bend the
piping so that the piping is not crushed.

Pull the connection cable into Indoor Unit

• The inside and outside connection cable can be
connected without rem oving the front grille.

Cut and flare the embedded piping

• When determining the dimensions of the piping,
slide the unit all the way to the left on the installation
plate.

• Refer to the section “Cutting and flaring the piping”.

Install the Indoor Unit

Connect the piping

• Please refer to “C onnecting the piping” column in
outdoor unit section. (Below steps are done after
connecting the outdoor piping and gas-leakage
confirmatio n .)

Insulate and finish the piping

• Please refer to “Insulation of piping connection”
column as mentioned in indoor/outdoor unit
installation.

Secure the Indoor Unit

PUSH PUSH

Shock absorber

Right Rear piping

T ape it with

piping in a position as

mentioned in

Fig. bel ow.

Piping

Cover for

Drain

the right
piping

Cover for the
bottom piping

hose

Cover for the
bottom piping

Howtokeepthecover

In case of the cover is cut, keep the
cover at the rear of chassis as shown
in the illustration for future
reinstallation.
(Left, right and 2 bottom covers for
piping.)

Cover
for the
left
piping

Cover for pipin g

Right and Right Bottom piping

T ape it with piping in a

position as mentioned in

Fig. below.

Drain hose

Install the indoor unit

Hook the indoor unit onto the upper
portion of installation plate.(Engage
the indoor unit with the upper edge
of the installation plate). Ensure the
hooks are properly seated on the
installation plate by moving it in left
and right.

Piping

Cover for
the right
piping

Cover for the
bottom piping

Indoor unit

Cover for
the left
piping

Hooks at
installation
plate

Sleeve for
piping hole

Piping

Drain hose

Secure the Indoor Unit

1. Press the lower left and right side
of the unit against the installation
plate until hooks engages with their
slot (sound click).

Unit’s
hook

To take out the unit, push the
marking at the bottom unit, and pull it
slightly towards you to disengage the

n

k

m

i

r

a

g

hooks from the unit.

Installation
plate

Insert the connection cable

A

2

b

3

o

/

(

4

u

7

"

t

0

-

-

3

8

5

0

/

m

3

2

m

"

)

Guide
surface

Connection cable

Connection cable

Gas side
piping

Liquid side
piping

Drain hose

(This can be used for left rear piping and bottom
piping also.)

18

Replace the drain hose

Rear view for left piping installation

Drain cap

Drain hose

Connection cable

Drain hose

Adjust the piping slightly downwards.

Piping

Drain hose

Sleeve for pip ing hole

More than 37

Connection
cable

13

/32"(950mm)

How to pull the piping and drain hose out, in case of embedded piping.

•

Apply putty or
caulking material
to seal the wa ll
opening.

PVC tube for
drain hose (VP-20)

PVC tube
for d rain
hose

Drain hose adapter

Join indoor drain hose to 3/4" (20 mm) nominal PVC pipe size

•

by using drain hose adapter

Remarks :
Make sure indoor unit drain hose & 3/4" (20 mm ) nom inal PVC pipe
are fully inserted to drain hose adapter

8

usage

"

16

/

9

More than 27

(700 mm)

Indoor unit

3

when necessary.

8

8

.

h

t

e

r

o

/

M

3

1

7

3

e

r

o

M

"

1/2

18

PVC tube (VP-65) for piping
and connection cable

PVC tube for drain hose (VP-30)

Cable

Piping

15

/16"(100mm)

n

a

2

3

h

t

70

4

(

5

9

(

"

n

a

m

)

m

m

0

Connection
cable

Piping

)

Drain hose

m

from main unit

In case of left piping how to insert the connection

•

cable and drain hose.

°

5

4

Drain
hose

Cable

Piping

(For the right piping, follow the same procedure)

Indoor unit
drain hose

Close join by Vinyl Tape ( )

Drain hose adapter

3/4" (20 mm) nominal PVC pipe

- Install incline downward more than 1°

- Apply PVC glue at the join.

8

9.2.4 Connect the Cable to the Indoor Unit

1. The inside and outside connection cable can
be connected without removing the front grille.

2. Unscrew the conduit cover and fix the conduit
connector to conduit cover with lock nut, then
secure it against chassis.

3. Connection cable between indoor unit and
outdoor unit should be UL listed or CSA
approved 4 conductor wires minimum AWG16
in accordance with local electric codes.
o Ensure the colour of wires of outdoor unit

and terminal number are the same as the
indoor's respectively

Terminals on the indoor unit 1 2 3

Colour of wires (connection cable)

Terminals on the outdoor unit 1 2 3

WARNING

This equipment must be properly earthed.

o Earth lead wire shall be Yellow/Green

(Y/G) in colour and shall be longer than
other lead wires as shown in the figure for
electrical safety in case of the slipping.

Conduit
Connector

Conduit
Cover

Lock Nut

Chassis

Rear Side of Indoor Unit

Ter m i n a l
Board

Indoor and
outdoor
connection
cable

123

Holder

Earth Wire
longer than
others AC
wires for
safety
reason

19

9.2.5 Wiring Stripping and connecting requirement



mproperfla

rin

g



Wire stripping

Indoor/outdoor
connection
terminal board

No loose strand
when inserted

WARNING

Do not joint wires

(10±1 mm)

13/32" ± 1/16"

RISK OF FIRE

JOINING OF WIRES
MAY CAUSE
OVER HEATING
AND FIRE.

7

/32"

(5 mm)

or more

(gap between wires)

Conductor

fully inserted

ACCEPT PROHIBITED PROHIBITED

Conductor

over inserted

OR

Conductor not

fully inserted

OR

OR

Use complete wire without joining.

Use approved socket and plug with ear th pin.

Wire connection in this area must follow to
national wiring rules.

9.2.5.1 Cutting and flaring the piping

1 Please cut using pipe cutter and then remove the burrs.
2 Remove the burrs by using reamer. If burrs is not removed, gas leakage may be caused.

Turn the piping end down to avoid the metal powder entering the pipe.

3 Please make flare after inserting the flare nut onto the copper pipes.

1

Bar

0–

/32"

(0-0.5 mm)

Copper
pipe

When properly flared, the internal surface of the
flare will evenly shine and be of even thickness.
Since the flare part comes into contact with the
connections, carefully c heck the flare finish.

.Tocut

Pipe

Poin t down

2. T o remove burrs

Reamer

Bar

Clamp handle

3. To flare

Handle

Yo k e

Core

Red arrow mark

I

Inclined Surface

damaged

Cracked Uneven

thickness

20

10. Operation Control

10.1 Basic Function

Inverter control, which equipped with a microcomputer in determining the most suitable operation mode as time
passes, automatically adjusts output power for maximum comfort always. In order to achieve the suitable operation
mode, the microcomputer maintains the set temperature by measuring the temperature of the environment and
performing temperature shifting. The compressor at outdoor unit is operating following the frequency instructed by
the microcomputer at indoor unit that judging the condition according to internal setting temperature and intake air
temperature.

10.1.1 Internal Setting Temperature

Once the operation starts, remote control setting temperature will be taken as base value for temperature shifting
processes. These shifting processes are depending on the air conditioner settings and the operation environment.
The final shifted value will be used as internal setting temperature and it is updated continuously whenever the
electrical power is supplied to the unit.

Remote Control Setting Temperature

Outdoor Air Temperature Shifting

60.8°F - 86°F

Auto Operation Mode Shifting

Indoor Air Temperature Shifting

Powerful Mode Shifting

Setting Temperature Limit Checking

(Min: 60.8°F; Max 91.4°F)

Internal Setting Temperature

10.2 Cooling operation

10.2.1 Thermostat control

 Capability supply to indoor unit is OFF (Expansion valve closed) when Intake Air Temperature - Internal setting

temperature < -3.6°F.

 Capability resume supply to indoor unit after waiting for 3 minutes, if the Intake Air temperature - Internal setting

temperature > Capability supply OFF point.

10.3 Soft Dry Operation

10.3.1 Thermostat control

 Capability supply to indoor unit is OFF (Expansion valve closed) when Intake Air Temperature - Internal setting

temperature < -5.4°F.

 Capability resume to indoor unit after waiting for 3 minutes, if the Intake Air temperature - Internal setting

temperature > Capability supply OFF point.

10.4 Heating Operation

10.4.1 Thermostat control

 Capability supply to indoor unit is OFF (Expansion valve closed) when Intake Air Temperature - Internal setting

temperature > 1.8°F.

 During this condition, the indoor fan is stopped if compressor is ON.
 Capability resume supply to indoor unit after waiting for 3 minutes, if the Intake Air Temperature - Internal setting

temperature < Capability supply OFF point.

21

10.4.2 Temperature Sampling Control

 Temperature sampling is controlled by outdoor unit where room temperature for all power supply ON indoor unit

could be obtained.

 When capability supply to the indoor unit is OFF and the compressor is ON during heating operation, the indoor

fan motor is stopped. During this condition, 15 seconds after sampling signal from outdoor unit is received, the
indoor fan start operation at low fan speed.

 However, within first 4 minutes of capability stopped supply to the indoor unit, even sampling signal is received,

the sampling control is cancelled.

10.5 Automatic Operation

 This mode can be set using remote control and the operation is decided by remote control setting temperature,

remote control operation mode, indoor intake and outdoor air temperature.

 During operation mode judgment, indoor fan motor (with speed of -Lo) and outdoor fan motor are running for

30 seconds to detect the indoor intake and outdoor air temperature. The operation mode is decided based on
below chart.

Indoor intake air
temperature (F)

96.8

Heating Mode

Soft Dry Mode

T1

T2

T3

Cooling Mode

Remote Control
setting temperature

60.8

66.255.4 69.8 73.4 77

10.6 Indoor Fan Speed Control

 Indoor Fan Speed can be set using remote control.

10.6.1 Fan Speed Rotation Chart

Mode Fan Tap Application rpm rpm

SHi Pwr Me+ 1080 1110

Hi Fc, RC 990 1020

Me+ RC 900 930

Me RC 820 840

COOL

Mode Fan Tap Application rpm rpm

HEAT

Me- RC 740 750

Lo Fcmin, RC 660 660

Lo- QuietLo 570 570

SLo Dry 550 550

SSLo Auto Cut 540 540

SSHi Pwr Me+ 1210 1240

SHi Fh, RC 1120 1150

Me+ RC 1030 1050

Me RC 950 960

Me- RC 860 870

Lo Fhmin, RC 780 780

Lo- QuietLo 690 690

SLo Thermo Off, Hot start 580 580

SSLo Thermo Off 570 570

Outdoor air
temperature (F)

ME5RKUA ME7RKUA

ME5RKUA ME7RKUA

22

10.7 Indoor Fan Motor Operation

H

FanS

M

10.7.1 Residual Heat Removal Control

 To prevent high pressure at indoor unit, when heating mode thermostat-off condition or power supply OFF,

indoor fan continue to operate at controlled fan speed for maximum 30 seconds then stop.

10.7.2 Basic Rotation Speed (rpm)

 Manual Fan Speed

[Cooling, Dry]
o Fan motor’s number of rotation is determined according to remote control setting.

Remote control ○ ○ ○ ○ ○

Tab Hi Me+ Me Me- Lo

[Heating]
o Fan motor’s number of rotation is determined according to remote control setting.

Remote control ○ ○ ○ ○ ○

Tab Shi Me+ Me Me- Lo

 Auto Fan Speed

[Cooling, Dry]

o According to room temperature and setting temperature, indoor fan speed is determined automatically.
o The indoor fan will operate according to pattern below.

peed

igher

edium

Lower

abc def gh

o During operation, indoor fan motor may stop due to odor prevention.

[Heating]
o According to indoor pipe temperature, automatic heating fan speed is determined as follows.

[1 pattern : 10 s]

ab

RPM Increased

o

F

102.2

o

F

66.2

Indoor Pipe Temp.

RPM Maintain

RPM Reduced

OFF

95oC

60.8oF

 Feedback control

o Immediately after the fan motor started, feedback control is performed once every second.
o During fan motor on, if fan motor feedback ≥ 2550 rpm or < 50 rpm continue for 10 seconds, then fan motor

error counter increase, fan motor is then stop and restart. If the fan motor counter becomes 7 times, then
H19 - fan motor error is detected. Operation stops and cannot on back.

23