Panasonic cu-2e18sbu service manual

Order No: PAPAMY1604017CE

Outdoor Unit CU-2E18SBU

Please file and use this manual together with the service manual for Model No. CS-ME5RKUA CS-ME7RKUA, CS-E9RKUA CS-E12RKUA, CS-ME9SB4U, CS-E12RB4UW, CS-ME5SD3UA CS-ME7SD3UA, CS-E9SD3UAW CS-E12SD3UAW, Order No. PAPAMY1503085CE, PAPAMY1501049CE, PAPAMY1604059CE, PAPAMY1503095CE, PAPAMY1604056CE, PAPAMY1604052CE.

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 product or 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

TABLE OF CONTENTS

PAGE PAGE

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

2. Specifications ..................................................... 5

2.1 CU-2E18SBU ............................................... 5

3. Dimensions ......................................................... 8

4. Refrigeration Cycle Diagram ............................. 9

5. Block Diagram .................................................. 10

6. Wiring Connection Diagram ............................ 11

7. Electronic Circuit Diagram .............................. 12

8. Printed Circuit Board ....................................... 13

8.1 Main Printed Circuit Board ......................... 13

8.2 Noise Filter Printed Circuit Board ............... 14

8.3 Display Printed Circuit Board ..................... 14

13.16 Compressor Discharge High Pressure

Protection Control .......................................27

14. Servicing Mode .................................................28

14.1 CU-2E18SBU .............................................28

15. Troubleshooting Guide ....................................30

15.1 Self Diagnosis Function ..............................30

16. Disassembly and Assembly Instructions ......33

16.1 Outdoor Unit Removal Procedure ..............33

17. Technical Data ..................................................36

17.1 Cool Mode Performance Data ....................36

17.2 Heat Mode Performance Data ....................38

18. Service Data ......................................................40



9. Installation Information .................................... 15

9.1 Check Points .............................................. 15

10. Installation Instruction ..................................... 16

10.1 Accessories Supplied with Outdoor

Unit ............................................................. 16

10.2 Cutting and Flaring the Piping .................... 16

10.3 Select the Best Location ............................. 17

10.4 Install the Outdoor Unit ............................... 18

10.5 Connect the Piping ..................................... 18

10.6 Evacuation of the Equipment ..................... 19

10.7 Connect the Cable to the Outdoor Unit ...... 20

10.8 Heat Insulation ............................................ 20

11. Operation Control ............................................. 21

11.1 Cooling Operation ....................................... 21

11.2 Heating Operation ...................................... 22

12. Simultaneous Operation Control .................... 23

13. Protection Control ............................................ 24

13.1 Freeze Prevention Control (Cool) ............... 24

13.2 Dew Prevention Control (Cool) ................... 24

13.3 Electronic Parts Temperature Rise

Protection 1 (Cool) ...................................... 24

13.4 Electronic Parts Temperature Rise

Protection 2 (Cool) ...................................... 24

13.5 Cooling Overload Control (Cool) ................ 25

13.6 Heating Overload Control (Heat) ................ 25

13.7 Extreme Low Temperature Compressor

Low Pressure Protection Control (Heat) ..... 25

13.8 Deice Control .............................................. 26

13.9 Time Delay Safety Control (Restart

Control) ....................................................... 26

13.10 30 seconds Force Operation ...................... 26

13.11 Total Current Control .................................. 26

13.12 IPM (power transistor) Protection

Control ........................................................ 26

13.13 Compressor Protection Control (Gas leak

detection control 1) ..................................... 27

13.14 Compressor Protection Control (Gas leak

detection control 2) ..................................... 27

13.15 Valve Close Detection Control ................... 27

18.1 Operation Characteristics ...........................40

19. Exploded View and Replacement Parts

List .....................................................................44



2

1. Safety Precautions

 Read the following “SAFETY PRECAUTIONS” carefully before installation.  Electrical work must be installed by a licensed electrician. Be sure to use the correct rating of the power plug and main circuit

for the model to be 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 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 running to confirm that no abnormality occurs after the installation. 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.

This indication shows the possibility of causing death or serious injury.

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

Symbol with white background denotes item that is PROHIBITED from doing.

Symbol with dark background denotes item that must be carried out.

WARNING

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

1. may 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

2. with 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

9.

injury.

 Thickness for 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 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

12. electrical shock.

Install at a strong and firm location which is able to withstand the set’s weight. 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/OUTDOOR UNIT ELECTRICAL WIRING and connect tightly for indoor/outdoor 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 fire 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

16. cause 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.

3

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

18.

refrigeration piping and valves at opened condition 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

20. may break and cause refrigerant gas leakage.

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

21. contact with fire.

22. Ventilate if there is refrigerant gas leakage during operation. It may cause toxic gas when the refrigerant comes into contact 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.

CAUTION

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

1. of the unit, it may cause fire.

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

2. of the 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.

Power supply connection to the room air conditioner. Power supply cord shall be UL listed or CSA approved 3 conductor with minimum AWG12 wires. Power supply point should be in an easily accessible place for power disconnection in case of emergency.

7. In some countries, permanent connection of this air conditioner to the power supply is prohibited.

Fix power supply connection to a circuit breaker for permanent connection. Use NRTL approved fuse or circuit breaker (rating refers to name plate) for permanent connection.

Installation work.

8. It may take two people to carry out the installation work.

4

2. Specifications

2.1 CU-2E18SBU

Item Unit OUTDOOR UNIT

Indoor Unit Combination 2.5kW + 2.5kW

Power Source

Capacity

Running Current A 6.6 - 6.0

Electrical

Cooling Operation

Heating Operation

Maximum Current A 13.6

Maximum Input Power W 3.04k

Starting Current A 8.5

Minimum Circuit Ampacity A 20

Dimension

Net Weight kg (lb) 71 (157)

Connection cable 3 + 1 (Earth) ø1.5 mm2

Pipe Length Range (1 room) m (ft) 3 ~ 25 (9.8 ~ 82.0)

Maximum Pipe Length (Total Room) m (ft) 50 (164.0)

Refrigerant Pipe Diameter

Compressor

Air Circulation

Fan Speed High RPM 580

Heat Exchanger

Data

Noise

Power Factor % 97 / 96

Capacity

Electrical

Data

Noise

Power Factor % 99 / 98

Height mm (inch) 795 (31-5/16)

Width mm (inch) 875 + 95 (34-15/32 + 3-3/4)

Depth mm (inch) 320 (12-5/8)

Liquid Side mm (inch) 6.35 (1/4)

Gas Side mm (inch) 9.52 (3/8)

Type Hermetic Motor

Motor Type DC Brushless (4-poles)

Rated Output W 1.30k

Type Propeller Fan

Motor Type DC Brushless (8-poles)

Rated Output W 60

Type Plate fin configuration forced draft type

Tube Material Copper

Fin Material Aluminum (Blue Coat)

Row/Stage 2/36

FPI 19

Power Input kW 1.33 (0.36 ~ 1.69)

EER W/W 3.68 (5.83 ~ 3.47)

BTU/hW 12.55 (20.00 ~ 11.85)

Sound Pressure Level dB-A 48

Sound Power Level dB 62

Running Current A 8.5 - 7.8

Power Input kW 1.75 (0.40 ~ 2.18)

COP W/W 3.38 (5.28 ~ 3.30)

BTU/hW 11.50 (18.00 ~ 11.30)

Sound Pressure Level dB-A 49

Sound Power Level dB 63

kW 4.89 (2.10 ~ 5.86)

BTU/h 16700 (7200 ~ 20000)

kW 5.94 (2.11 ~ 7.20)

BTU/h 20200 (7200 ~ 24600)

1 Phase, 208 – 230V, 60Hz (Power supply from

outdoor unit)

5

Item Unit OUTDOOR UNIT

Air Volume High m3/min (ft3/min) 41.0 (1447)

Refrigerant Control Device Expansion Valve

Refrigerant Oil cm3 FV50S (900)

Refrigerant (R410A) g (oz) 2.23k (78.7)

Dry Bulb Wet Bulb

Cooling

Indoor Operation Range

Heating

Cooling

Outdoor Operation Range

Heating

Maximum °C (°F) 32 (89.6) 23 (73.4)

Minimum °C (°F) 16 (60.8) 11 (51.8)

Maximum °C (°F) 30 (86.0) —

Minimum °C (°F) 16 (60.8) —

Maximum °C (°F) 46 (114.8) 26 (78.8)

Minimum °C (°F) -10 (14.0) — / —

Maximum °C (°F) 24 (75.2) 18 (64.4)

Minimum °C (°F) -15 (5.0) -16 (3.2)

Note

 Specifications are subject to change without notice for further improvement.

 Multi split combination possibility:

o A single outdoor unit enables air conditioning of up to two separate rooms for CU-2E18SBU.

Outdoor Unit

CU-2E18SBU

A B

1.6 kW CS-ME5RKUA, CS-ME5SD3UA

2.0 kW CS-ME7RKUA, CS-ME7SD3UA

Wall

Capacity range of connectable indoor units From 3.2 kW to 6.4 kW

1 room maximum pipe length (m (ft)) 25 (82.0)

Allowable elevation (m (ft)) 15 (49.2)

Total allowable pipe length (m (ft)) 50 (164.0)

Total pipe length for maximum chargeless length (m (ft)) 20 (65.6)

Piping Length

Additional gas amount over chargeless length (g/m (oz/ft)) 20 (0.2)

Remarks for CU-2E18SBU

1. At least two indoor units must be connected.

2. The total nominal cooling capacity of indoor units that will be connected to outdoor unit must be within connectable capacity range of indoor unit. (as shown in the table above) Example: The indoor units’ combination below is possible to connect to CU-2E18SBU. (Total nominal capacity of indoor units is between

3.2 kW to 6.4 kW)

1) Two CS-E9RKUAW only. (Total nominal cooling capacity is 5.0 kW)

2) One CS-E9RKUAW and one CS-E12RKUAW. (Total nominal cooling capacity is 5.7 kW)

 Specifications are subject to change without notice for further improvement.

2.5 kW CS-E9RKUAW, CS-ME9SB4U, CS-E9SD3UAW

3.2 kW CS-E12RKUAW, CS-E12RB4UW, CS-E12SD3UAW

Note: “

• •

•” : Available

6

2 Room

Indoor unit

capacity

Cooling

1.6 + 1.6 3.2 1.620 1.620 3.24 2.10 ～ 3.89 770 360 ～ 960 4.20 19.00 3.6 0.3 + 0.3

1.6 + 2.0 3.6 1.613 2.017 3.63

1.6 + 2.5 4.1 1.616 2.524 4.14 2.10 ～ 4.97 1030 360 ～ 1370 4.02 19.00 4.7 0.3 + 0.5

1.6 + 3.2 4.8 1.610 3.220 4.83 2.10 ～ 5.80 1290 360 ～ 1680 3.74 19.00 5.8 0.3 + 0.6

2.0 + 2.0 4.0 2.010 2.010 4.02 2.10 ～ 4.82 980 360 ～ 1310 4.10 19.00 4.5 0.4 + 0.4

2.0 + 2.5 4.5 2.013 2.517 4.53

2.0 + 3.2 5.2 1.881 3.009 4.89 2.10 ～ 5.86 1330 360 ～ 1690 3.68 19.00 6.0 0.4 + 0.6

2.5 + 2.5 5.0 2.445 2.445 4.89 2.10 ～ 5.86 1330 360 ～ 1690 3.68 19.00 6.0 0.5 + 0.5

2.5 + 3.2 5.7 2.145 2.745 4.89 2.10 ～ 5.86 1330 360 ～ 1690 3.68 19.00 6.0 0.5 + 0.6

3.2 + 3.2 6.4 2.445 2.445 4.89

Total

Room A Room

Cooling Capacity (kW) Input Power (W)

Total min ～ max Rating min ～ max

B

2.10 ～ 4.36

2.10 ～ 5.44

2.10 ～ 5.86

2 Room

Indoor unit

capacity

Cooling

1.6 + 1.6 3.2 5500 5500 11000 7200 ～ 13300 770 360 ～ 960

1.6 + 2.0 3.6 5511 6889 12400 7200 ～ 14900 860 360 ～ 1110

1.6 + 2.5 4.1 5502 8598 14100

1.6 + 3.2 4.8 5500 11000 16500 7200 ～ 19800 1290 360 ～ 1680

2.0 + 2.0 4.0 6850 6850 13700 7200 ～ 16400 980 360 ～ 1310

2.0 + 2.5 4.5 6844 8556 15400 7200 ～ 18500 1210 360 ～ 1580

2.0 + 3.2 5.2 6423 10277 16700 7200 ～ 20000 1330 360 ～ 1690

2.5 + 2.5 5.0 8350 8350 16700 7200 ～ 20000 1330 360 ～ 1690

2.5 + 3.2 5.7 7325 9375 16700

3.2 + 3.2 6.4 8350 8350 16700 7200 ～ 20000 1330 360 ～ 1690

Total

Cooling Capacity (BTU/hr) Input Power (W)

Room A Room

Total min ～ max Rating min ～ max

B

7200 ～ 16900

7200 ～ 20000

 Specifications are subject to change without notice for further improvement.

2 Room

Indoor unit

capacity

Heating

1.6 + 1.6 3.2 2.350 2.350 4.70

1.6 + 2.0 3.6 2.329 2.911 5.24 2.11 ～ 6.29 1600 400 ～ 2020 3.26 9.50 8.50 7.2

1.6 + 2.5 4.1 2.181 3.409 5.59 2.11 ～ 6.71 1740 400 ～ 2170 3.20 9.50 8.50 7.8

1.6 + 3.2 4.8 1.980 3.960 5.94 2.11 ～ 7.13 1800 400 ～ 2340 3.30 9.50 8.50 8.0

2.0 + 2.0 4.0 2.890 2.890 5.78 2.11 ～ 6.94 1770 400 ～ 2260 3.26 9.50 8.50 7.8

2.0 + 2.5 4.5 2.640 3.300 5.94 2.11 ～ 7.13 1870 400 ～ 2360 3.16 9.50 8.50 8.3

2.0 + 3.2 5.2 2.285 3.655 5.94

2.5 + 2.5 5.0 2.970 2.970 5.94 2.11 ～ 7.20 1750 400 ～ 2180 3.38 9.50 8.50 7.8

2.5 + 3.2 5.7 2.605 3.335 5.94 2.11 ～ 7.20 1750 400 ～ 2180 3.38 9.50 8.50 7.8

3.2 + 3.2 6.4 2.970 2.970 5.94 2.11 ～ 7.20 1750 400 ～ 2180 3.38 9.50 8.50 7.8

Total

Heating Capacity (kW) Input Power (W)

Room A Room

Total

B

min ～ max

2.11 ～ 5.64

2.11 ～ 7.20

Rating

1450

1750

2 Room

Indoor unit

capacity

Heating

1.6 + 1.6 3.2 8000 8000 16000 7200 ～ 19200 1450 400 ～ 1770 11.00 9.50 8.50 6.5

1.6 + 2.0 3.6 7956 9944 17900 7200 ～ 21400 1600 400 ～ 2020 11.15 9.50 8.50 7.2

1.6 + 2.5 4.1 7454 11646 19100 7200 ～ 22800 1740 400 ～ 2170 10.95 9.50 8.50 7.8

1.6 + 3.2 4.8 6733 13467 20200 7200 ～ 24400 1800 400 ～ 2340 11.20 9.50 8.50 8.0

2.0 + 2.0 4.0 9850 9850 19700

2.0 + 2.5 4.5 8978 11222 20200 7200 ～ 24400 1870 400 ～ 2360 10.80 9.50 8.50 8.3

2.0 + 3.2 5.2 7769 12431 20200 7200 ～ 24600 1750 400 ～ 2180 11.50 9.50 8.50 7.8

2.5 + 2.5 5.0 10100 10100 20200 7200 ～ 24600 1750 400 ～ 2180 11.50 9.50 8.50 7.8

2.5 + 3.2 5.7 8860 11340 20200 7200 ～ 24600 1750 400 ～ 2180 11.50 9.50 8.50 7.8

3.2 + 3.2 6.4 10100 10100 20200 7200 ～ 24600 1750 400 ～ 2180 11.50 9.50 8.50 7.8

Total

Heating Capacity (BTU/hr) Input Power (W)

Room A Room

Total min ～ max Rating min ～ max

B

7200 ～ 23600

1770

 Specifications are subject to change without notice for further improvement.

860

1210

1330

1030

1330

min ～ max

400 ～ 1770

400 ～ 2180

400 ～ 2260

360 ～ 1110

360 ～ 1580

360 ～ 1690

360 ～ 1370

360 ～ 1690

COP W/W

3.24 9.50 8.50 6.5

3.38 9.50 8.50 7.8

COP

Btu/h.W

11.10 9.50 8.50 7.8

EER

SEER

W/W

4.22 19.00 4.0 0.3 + 0.4

3.74 19.00 5.5 0.4 + 0.5

3.68 19.00 6.0 0.6 + 0.6

EER

Btu/h.W

14.25

14.40

13.65

12.75

13.95

12.70

12.55

SEER

19.00 3.6 0.3 + 0.3

19.00 4.0 0.3 + 0.4

19.00 4.7 0.3 + 0.5

19.00 5.8 0.3 + 0.6

19.00 4.5 0.4 + 0.4

19.00 5.5 0.4 + 0.5

19.00 6.0 0.4 + 0.6

19.00 6.0 0.5 + 0.5

19.00 6.0 0.5 + 0.6

19.00 6.0 0.6 + 0.6

HSPF

Region

IV

HSPF

Region

IV

Region

V

Region

V

Current,

230V (A)

Current,

230V (A)

Current,

230V

(A)

Current,

230V

(A)

Moisture

Removal

Volume (l/h)

Moisture Removal

Volume (l/h)

Moisture Removal

Volume

(l/h)

Moisture

Removal

Volume

(l/h)

7

3. Dimensions

Space necessary for

installation

3-7/8

1-3/32

(5-5/32)

24-1/8

5-5/32 3-3/4

1-1/2

3-7/8

Anchor Bolt Pitch

14-13/64 x 24-1/8

Unit: inch

39-3/38

34-15/32

3-9/32

5-7/321-5/8

14-3/6

2-5/16 12-5/8

15/16

2-1/2

1-21/32

(63/64)

43/64

3-19/32

(3-3/16)

3-3/8 x 3 = 10-1/8

(8-9/32)

(6-9/16)

31-5/16

8

4. Refrigeration Cycle Diagram

INDOOR A

LIQUID SIDE

3- WAY VALVE

INTAKE

TEMP.

SENSOR

HEAT

EXCHANGER

(EVAPORATOR)

INTAKE

TEMP.

SENSOR

HEAT

EXCHANGER

(EVAPORATOR)

PIPE

TEMP.

SENSOR

PIPE

TEMP.

SENSOR

LIQUID SIDE

3- WAY VALVE

GAS SIDE

3- WAY VALVE

GAS SIDE

PIPE

TEMP.

SENSOR

PIPE

TEMP.

SENSOR

STRAINER

EXPANSION

VALVE A

EXPANSION

VALV E B

OUTDOOR

STRAINER3- WAY VALVE

CONDENSOR

DISCH.

PIPE TEMP.

SENSOR (DEF)

INTAKE

TEMP.

SENSOR

HEAT

EXCHANGER

(CONDENSOR)

TEMP.

SENSOR

INDOOR B

PIPE

TEMP.

SENSOR

PIPE

TEMP.

SENSOR

3- WAY VALVE

COMPRESSOR

TEMP.

SENSOR

COMPRESSOR

9

COOLING

HEATING

5. Block Diagram

COMP

FM

FUSE

L

REACTOR

SC

FUSE

NOISE

FILTER

L

POWER

SUPPLY

1

2

3

N

TO INDOOR UNIT ATO INDOOR UNIT B

123

10

6. Wiring Connection Diagram

V

U

W

DB3

LL

L

P

DB1

1

L

N

L

FUSE1

T 3.15A

RY-C

BLU

RED

33

BLU

RED

BLK

1

COMPRESSOR

YLW

11

CORE

YLW

1

L 250V

FM

FAN MOTOR

7

WHITE

CN-FM1

RED

1

BLUE

CN-PSW1

T1

HIGH PRESSURE SW.

RED

2

LIQUID PIPE

SENSOR A

LIQUID PIPE

SENSOR B

1

WHITE

CN-TH3

GAS PIPE

SENSOR A

SENSOR B

SENSOR COMPLETE

1

10

CN-TH4

SENSOR COMPLETE

11

WHITE

1411161

WHITE

CN-TH1

CN-TH2

YELLOW

(THERMISTOR)

OUTLET TEMP.SENSOR

SENSOR

COMPLETE

(THERMISTOR)

COND.TEMP.SENSOR

(THERMISTOR)

SENSOR

COMPLETE

PIPE TEMP.SENSOR (DEF)

CONNECTION 5KD184XAB21 ()

REACTOR

YELLOW (W)

0.720

0.726

U - V

U - W

GRY

0.708

V - W

REACTOR

GRY

4

WHITE

CONNECTOR

RED (U)BLUE (V)

(TRADEMARK)

GRN

CORE

4

GRY BLK BLK

GRY

COMP. TERMINAL

GRN

L1-I L2-I L2-O L1-O

FG2

FG1

CT400

AC-WHT

CORE

CN-WHT

WHT

RY-PWR

AC-BLK

CN-BLK

CORE

BLK

PTC1

RY-AC

1

WHT

1

WHT

PTC2

T 2.5A

FUSE2

WHT

DB2

L 250V

WHT

WHITE

CN-DATA

WHT

WHITE

CN-DATA

9

WHT

9

ELECTRONIC CONTROLLER

(MAIN)

WHT

COOL ONLY

WHITE

CN-DISP 1

WHT

8

WHT

RY-HT

1

WHT

WHITE

1

WHT

1

RY-HOT

CR3

WHT

JP1

WHT

CN-DISP 1

WHITE

CN-DIS

CN-EV2

YELLOW

WHT

WHITE

M M

YELLOW

CN-NMODE

7

WHT

7

CN-NMODE 1

WHITE

CN-EV1

824

CN-HT

BLACK

1133

BLUE

CN-HOT

WHITE

CN-DISP 2

6

1

WHT

1

14

SENSOR

COMPLETE

(THERMISTOR)

DIS.T.TEMP.SENSOR

ELECTRO-

MAGNETIC COIL

(EXPAND VALVE)

ELECTRO-

MAGNETIC COIL

(EXPAND VALVE)

CASE

CRANK

HEATER

COIL

ELECTRO-

MAGNETIC

(4 WAY VALVE)

Resistance of Compressor Windings

BLK

L1

WHT

CORE

WHT

L2

Y/G

POWER SUPPLY

WHITE

ACN1

CORE

TERMINAL BOARD

CORE

BLACK

ACL1

CORE

1

TERMINAL BOARD

30A 250V

FUSE 401

CN-COM

RED

2

PRIORITY MODE

PUMP DOWN

WIRING CHECK

OPERATION TEST

Y/G

GROUND PLATE

REMARKS

BLU: BLUE

BLK: BLACK

WHT: WHITE

RED: RED

YLW: YELLOW

GRY: GRAY

GRN: GREEN

Y/G: YELLOW/GREEN

1

3

5

7

9

ELECTRONIC CONTROLLER

(SUB)

BLU

WHT

BLK

3

TO INDOOR UNIT ATO INDOOR UNIT B

1

2

3

POWER SAVE

ELECTRONIC CONTROLLER

(DISPLAY)

11

7. Electronic Circuit Diagram

FM

FAN MOTOR

1

7

1000p

47k

WHT

IC18

TC4052B

T1

9

WHT

9

1u

KB

16V

C212

16151413121110

2X

1X

VDD

X-COM

0Y2YY-C O M3Y1Y

1234567

13V

0X

V

COMPRESSOR

BLU

YLW

RED

33

CORE

BLU

YLW

RED

11

P

U

W

LL

L

N

WHITE

CN-FM1

DB3

BLK

1

REACTOR

4

WHITE

CONNECTOR

GRY BLK BLK

GRY

L1-I L2-I L2-O L1-O

GRY

AC-WHT

CORE

DB1

CT400

L

RY-C

RY-PWR

AC-BLK

FUSE1

PTC1

RY-AC

5V13V

T 3.15A

1

L 250V

PTC2

T 2.5A

FUSE2

10k

R253

DB2

L 250V

C276

R388

CORE

WHT

CN-WHT

BLK

5V

CN-BLK

5V

IC17

1

13V

16151413121110

VDD

TC4052B

0Y2YY-C O M3Y1Y

1234567

9

A

B

2X

1X

0X

3X

X-COM

INH

VEE

VSS

8

FG2

GRN

CORE

FG1

GRN

HIGH PRESSURE SW.

RED

1

2

BLUE

5.6k

R138

CN-PSW1

ELECTRONIC CONTROLLER

(MAIN)

WHITE

CN-DATA

WHITE

CN-DATA

9

A

B

3X

INH

VEE

VSS

8

3

SW1

1

5V

RY-HOT

CR3

4

2

JP1

LIQUID PIPE

SENSOR A

1

1%

R338

15.8k

1%

R333

15.8k

5V

3

4

SW2

1

2

COOL ONLY

LIQUID PIPE

SENSOR B

SENSOR COMPLETE

1u

6.3V

C241

WHITE

CN-TH3

1u

6.3V

C232

RY-HT

13V

WHITE

CN-DISP 1

1

WHT

WHITE

1

CN-DISP 1

5V

3

4

SW3

SW4

1

2

ON OFF

5V

10

161514

9

B1HBGFF00007

IC8

1

VCC

WHT

123

SW5

ON OFF

5V

234

8

IC8

R370 10k

R371 10k

R372 10k

R375 10k

R374 10k

R373 10k

1

WHT

123

WHT

5V

GAS PIPE

SENSOR A

1

1%

R342

15.8k

1%

R341

15.8k

13

IC8

13V

WHT

R304 1.2k

JP1

GREEN

GAS PIPE

B1HBGFF00007

WHITE

WHT

LED1

SENSOR B

SENSOR COMPLETE

11

1u

6.3V

WHITE

C240

CN-TH4

1u

6.3V

C239

9

IC15

116

215

314

413

710

VCC

10k

R147

10k

R146

5V

10k

R386

5V

10k

R256

CN-DISP 2

6

1

WHT

1

14

R307 1.2k

R306 1.2k

R305 1.2k

LED4

LED2

LED3

GREEN

5V

13V

10k

R365

GND

8

7

WHT

WHITE

7

CN-NMODE 1

R308 1.2k

LED5

GREEN

1%

R101

7.50k

1%

R100

15.0k

1%

R103

7.50k

D64

e

2SB1188

R309 1.2k

LED6

GREEN

WHITE

CN-TH1

1411161

1u

C46

6.3V

SENSOR

1u

C45

6.3V

1u

C48

6.3V

CN-TH2

YELLOW

1u

C47

6.3V

1%

R102

4.99k

1u

KB

6.3V

C209

WHITE

CN-DIS

CN-EV2

YELLOW

D61

D62

D63

KB

25V

C218

0.047u

D34

WHITE

CN-EV1

D57

D58

D59

D60

824

c

D33

Q25

b

CN-HT

BLACK

1133

BLUE

CN-HOT

COMPLETE

SENSOR

COMPLETE

SENSOR

COMPLETE

M M

CRANK

(THERMISTOR)

ELECTRO-

CASE

ELECTRO-

YELLOW

CN-NMODE

(THERMISTOR)

OUTLET TEMP.SENSOR

COND.TEMP.SENSOR

(THERMISTOR)

PIPE TEMP.SENSOR (DEF)

DIS.T.TEMP.SENSOR

MAGNETIC COIL

(EXPAND VALVE)

MAGNETIC COIL

(EXPAND VALVE)

HEATER

COIL

MAGNETIC

(4 WAY VALVE)

BLK

L1

WHT

L2

CORE

Y/G

POWER SUPPLY

WHITE

ACN1

CORE

TERMINAL BOARD

CORE

BLACK

ACL1

CORE

123

TERMINAL BOARD

30A 250V

FUSE 401

CN-COM

RED

13579

BLU

WHT

BLK

123

TO INDOOR UNIT ATO INDOOR UNIT B

ELECTRONIC CONTROLLER

(SUB)

POWER SAVE

ELECTRONIC CONTROLLER

(DISPLAY)

12

PRIORITY MODE

PUMP DOWN

WIRING CHECK

OPERATION TEST

Y/G

GROUND PLATE

8. Printed Circuit Board

8.1 Main Printed Circuit Board

CN- DATA

CN-HT

CN-HOT

CN-EV1

CN-TH1

CN-EV2 CN-DIS

CN-TH3

CN-TH2

CN-TH4 CN-PSW1

CN-FM1

13

8.2 Noise Filter Printed Circuit Board

CN-COM

CN- DATA

CN-WHT

CN-BLK

8.3 Display Printed Circuit Board

LED1

LED2

LED3

LED4

LED5

CN-DISP1

CN-NMODE1

CN-NMODE2

SW1

SW4

SW2

SW5 SW3

LED6

14