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Panasonic CU-2E18NBU service manual Ref. No, Description & Name, Q’Ty, Remark

Models: CU-2E18NBU

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REF. NO.	DESCRIPTION & NAME	Q’TY	CU-2E18NBU	REMARK
1	BASE PAN ASS'Y	1	CWD52K1239A
2	SOUND-PROOF BOARD	1	CWH151230

3	FAN MOTOR BRACKET	1	CWD541127
4	SCREW-FAN MOTOR BRACKET	3	CWH551217
5	CONDENSER COMPLETE	1	CWB32C2905	O

6	FAN MOTOR	1	EHDS80CAC
7	SCREW-FAN MOTOR	4	CWH551323
8	PROPELLER FAN	1	CWH00K1006

9	NUT - PROPELLER FAN	1	CWH561038J
10	COMPRESSOR	1	5KD184XAB21	O
11	PACKING	3	CWB81043

12	ANTI - VIBRATION BUSHING	3	CWH50055
13	NUT - COMPRESSOR	3	CWH561049
14	CRANKCASE HEATER	1	CWA341067

16	ACCUMLATOR	1	CWB131050
17	3-WAY VALVE (LIQUID)	2	CWB011601	O
18	3-WAY VALVE (GAS)	2	CWB011602	O

19	HOLDER COUPLING	1	CWH351170
20	STRAINER	1	CWB111062	O
21	STRAINER	2	CWB111063	O

22	EXPANSION VALVE	2	CWB051029	O
23	4-WAYS VALVE	1	CWB001057	O
24	DISCHARGE MUFFLER	1	CWB121042

25	PRESSURE SWITCH	1	CWA101007
26	FLARE NUT (1/4)	4	CWT251030
27	FLARE NUT (3/8)	4	CWT251031

28	SOUND PROOF MATERIAL	1	CWG302246
29	SOUND PROOF MATERIAL	1	CWG302520
30	SOUND PROOF MATERIAL	1	CWG302521

31	SOUND PROOF MATERIAL	1	CWG302522
32	SENSOR-COMPLETE	1	CWA50C2722	O
33	V-COIL COMPLETE (4-WAY VALVE)	1	CWA43C2392	O

34	V-COIL COMPLETE (EXPAND VALVE - WHITE)	1	CWA43C2381	O
35	V-COIL COMPLETE (EXPAND VALVE - YELLOW)	1	CWA43C2382	O
38	SENSOR-COMPLETE (DEF)	1	CWA50C2723	O

39	SENSOR-COMPLETE	1	CWA50C2710	O
40	SENSOR-COMPLETE (CN-TH4)	1	CWA50C2691	O
41	SENSOR-COMPLETE (CN-TH5)	1	CWA50C2692	O

42	HOLDER-SENSOR	3	CWH32074
43	ELECTRONIC CONTROLLER-MAIN	1	CWA73C6131R	O
44	ELECTRONIC CONT.-NOISE FILTER	1	CWA745975	O

45	ELECTRONIC CONTROLLER-DISPLAY	1	CWA746115	O
47	REACTOR	1	G0C403J00001	O
48	TERMINAL BOARD ASS'Y (L, N)	1	CWA28K1195	O

49	TERMINAL BOARD ASS'Y (1, 2, 3)	2	CWA28K1196	O
50	CONTROL BOARD COVER (TOP)	1	CWH131333
51	CONTROL BOARD COVER	1	CWH131364

52	CABINET TOP PLATE	1	CWE031131A
53	CONTROL BOARD COVER COMPLETE	1	CWH13C1209
54	CABINET FRONT PLATE CO.	1	CWE06K1071

55	CABINET SIDE PLATE ( L )	1	CWE041489A
56	CABINET SIDE PLATE ( R )	1	CWE041499A
57	WIRE NET	1	CWD041128A

58	HANDLE	1	CWE161010
60	INSTALLATION INSTRUCTION	1	CWF615177

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Panasonic CU-2E18NBU service manual Ref. No, Description & Name, Q’Ty, Remark

Contents

TABLE OF CONTENTS Outdoor Unit CU-2E18NBUList 16. Disassembly and Assembly Instructions18. Exploded View and Replacement Parts 1. Safety Precautions 7.Power supply connection to the air conditioner 2. Specifications 2.1CU-2E18NBUUnit OUTDOOR UNITOUTDOOR UNIT šMulti split combination possibilityUnit Indoor unit combination 3. Dimensions 4. Refrigeration Cycle Diagram 5. Block Diagram 6. Wiring Connection Diagram 7. Electronic Circuit Diagram 8. Printed Circuit Board 8.1Main Printed Circuit Board8.2Noise Filter Printed Circuit Board 8.3Display Printed Circuit Board68.6 - 65.6 ft x 0.2 oz/ft = 0.6 oz 9. Installation Information9.1Check Points 10. Installation Instruction 10.1 Select The Best Location10.2 Install The Outdoor Unit 10.3 Connect the PipingOutdoor Unit Installation Guidelines Gas Leak Checking10.4 Evacuation of the Equipment CUTTING AND FLARING THE PIPING10.5 Connect The Cable To The Outdoor Unit 10.6 Heat Insulation11. Operation Control 11.1 Cooling Operation11.2 Heating Operation 11.2.2Powerful Operation11.2.3Powerful Operation 11.2.1Outdoor fan control12.Simultaneous Operation Control 13.2 Dew Prevention control Cool 13. Protection Control13.1 Freeze Prevention control Cool 13.5 Cooling overload control Cool 13.6 Heating overload control Heat13.9 Time Delay Safety Control Restart Control 13.12 IPM power transistor Protection Control13.8 Deice Control 13.10 30 seconds Force Operation13.15 Valve close detection control 14. Servicing Mode 14.1 CU-2E18NBU14.1.3Wiring Error check 14.1.4Power Save Mode14.1.5Mode priority function 14.1.6Cooling only function15. Troubleshooting Guide 15.1 Self Diagnosis FunctionPage Page 16. Disassembly and Assembly Instructions 16.1 Outdoor Unit Removal Procedure16.1.3Removing the Control P.C. Board 16.1.4Removing the Propeller Fan and Fan MotorPage šCooling Characteristic 17. Technical Data17.1 Operation Characteristics šCooling Characteristic Compressor Freq FcšPiping Length Characteristic Cooling šPiping Length Characteristic Cooling Condition Room temperature 81F DBT, 66F WBT Operation condition High fan speed Outdoor temperature 95F DBT Compressor Freq FcšHeating Characteristic šHeating Characteristic Condition Room temperature 68F DBT Operation condition High fan speed Piping Length 24.6ft Compressor Freq FhšPiping Length Characteristic Heating šPiping Length Characteristic Heating Condition Room temperature 68F DBT Operation condition High fan speed Outdoor temperature 47F DBT, 43F WBT Compressor Freq FhCompressor Freq Fc šCooling Characteristic17.1.2Two Indoor Unit Operation šCooling Characteristic Compressor Freq FcšCooling Characteristic Compressor Freq FcšPiping Length Characteristic Cooling Condition Room temperature 81F DBT, 66F WBT Operation condition High fan speed Outdoor temperature 95F DBT Compressor Freq FcšPiping Length Characteristic Cooling Condition Room temperature 81F DBT, 66F WBT Operation condition High fan speed Outdoor temperature 95F DBT Compressor Freq FcšPiping Length Characteristic Cooling Condition Room temperature 81F DBT, 66F WBT Operation condition High fan speed Outdoor temperature 95F DBT Compressor Freq FcšHeating Characteristic Condition Room temperature 68F DBT Operation condition High fan speed Piping Length 24.6ft Compressor Freq FhšHeating Characteristic Condition Room temperature 68F DBT Operation condition High fan speed Piping Length 24.6ft Compressor Freq FhšHeating Characteristic Condition Room temperature 68F DBT Operation condition High fan speed Piping Length 24.6ft Compressor Freq FhšPiping Length Characteristic Heating Condition Room temperature 68F DBT Operation condition High fan speed Outdoor temperature 47F DBT, 43F WBT Compressor Freq FhšPiping Length Characteristic Heating Condition Room temperature 68F DBT Operation condition High fan speed Outdoor temperature 47F DBT, 43F WBT Compressor Freq FhšPiping Length Characteristic Heating Condition Room temperature 68F DBT Operation condition High fan speed Outdoor temperature 47F DBT, 43F WBT Compressor Freq Fh18. Exploded View and Replacement Parts List REF. NO DESCRIPTION & NAMEQ’TY CU-2E18NBU