Panasonic CU-2E18NBU Manuel de service

© Panasonic HA Air-Conditioning (M) Sdn. Bhd. 2011. Unauthorized copying and distribution is a violation of law. Order No: PHAAM1111120A1 Outdoor U

10 5. Block Diagram

11 6. Wiring Connection Diagram

12 7. Electronic Circuit Diagram

13 8. Printed Circuit Board 8.1 Main Printed Circuit Board

14 8.2 Noise Filter Printed Circuit Board 8.3 Display Printed Circuit Board

15 9. Installation Information 9.1 Check Points QUICK GUIDE PIPING AND ELECTRICAL SPECIFICATION Piping size Indoor (ID) & Outdoor (OD) units: Po

16 10. Installation Instruction10.1 Select The Best Location 10.1.1 Outdoor Unit  If an awning is built over the unit to prevent direct sunlight or

17 Outdoor Unit Installation Guidelines  Where a wall or other obstacle is in the path of outdoor unit’s intake or exhaust airflow, follow the insta

18 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 remo

19 10.5 Connect The Cable To The Outdoor Unit 1 Remove Control Board Cover (Metal) by loosening 2 screws. 2 Remove Valve Cover (Metal) by loosening

2 13.4 Electronic Parts Temperature Rise Protection 2 (Cool)...23 13.5 Cooling overload control (Cool)...

20 11. Operation Control 11.1 Cooling Operation 11.1.1 Outdoor fan control  When cooling operation is enabled, based on outdoor ambient temperature

21 11.2 Heating Operation 11.2.1 Outdoor fan control  When heating operation is enabled, based on outdoor ambient temperature, fan motor control wi

22 12. Simultaneous Operation Control 1 Operation modes which can be selected using the remote control unit: Automatic, Cooling, Soft Dry, Heating,

23 13. Protection Control 13.1 Freeze Prevention control (Cool)  When received freeze prevention signal from indoor unit, the compressor frequency

24 13.5 Cooling overload control (Cool)  This control detect outdoor pipe temperature and perform the compressor frequency restriction during cooli

25 13.8 Deice Control  When outdoor pipe temperature and outdoor air temperature is low, deice operation starts where indoor fan motor and outdoor f

26 13.13 Compressor Protection Control (Gas leak detection control 1)  Control start conditions o For 5 minutes, the compressor continuously oper

27 14. Servicing Mode 14.1 CU-2E18NBU 14.1.1 Pump down operation (SW1)  Operate the pump down process according to the following procedure o Con

28 14.1.3 Wiring Error check  The unit capable to correct the wiring error automatically by following procedures. o Confirm the valve on the liqui

29 15. Troubleshooting Guide 15.1 Self Diagnosis Function  The display screen of wireless remote control unit and the self-diagnosis LEDs (green) o

3 CAUTION WARNING WARNING 1. Safety Precautions  Read the following “SAFETY PRECAUTIONS” carefully before perform any servicing.  Electrical work

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32 WARNING 16. Disassembly and Assembly Instructions High Voltage are generated in the electrical parts area by the capacitor. Ensure that the cap

33 16.1.3 Removing the Control P.C. Board 6 Remove the drip proof cover. 7 Disconnect the connectors (lead wires of the compressor, sensor

34 3 Disconnect the fan motor connector from the control P.C. Board. 4 Loosen the 4 fan motor mounting screws then remove the fan motor.

35 17. Technical Data 17.1 Operation Characteristics 17.1.1 One Indoor Unit Operation  Cooling Characteristic [Condition] Room temperature: 81°F

36  Cooling Characteristic [Condition] Room temperature: 81°F (DBT), 66°F (WBT) Operation condition: High fan speed Piping Length: 24.6ft Comp

37  Piping Length Characteristic Cooling [Condition] Room temperature: 81°F (DBT), 66°F (WBT) Operation condition: High fan speed Outdoor tempe

38  Piping Length Characteristic Cooling [Condition] Room temperature: 81°F (DBT), 66°F (WBT) Operation condition: High fan speed Outdoor tempe

39  Heating Characteristic [Condition] Room temperature: 68°F (DBT) Operation condition: High fan speed Piping Length: 24.6ft Compressor Freq:

4 CAUTION 18. For R410A models, when connecting the piping, do not use any existing (R22) pipes and flare nuts. Using such same may cause abnorm

40  Heating Characteristic [Condition] Room temperature: 68°F (DBT) Operation condition: High fan speed Piping Length: 24.6ft Compressor Freq:

41  Piping Length Characteristic Heating [Condition] Room temperature: 68°F (DBT) Operation condition: High fan speed Outdoor temperature: 47°F

42  Piping Length Characteristic Heating [Condition] Room temperature: 68°F (DBT) Operation condition: High fan speed Outdoor temperature: 47°F

43 17.1.2 Two Indoor Unit Operation  Cooling Characteristic [Condition] Room temperature: 81°F (DBT), 66°F (WBT) Operation condition: High fan s

44  Cooling Characteristic [Condition] Room temperature: 81°F (DBT), 66°F (WBT) Operation condition: High fan speed Piping Length: 24.6ft Comp

45  Cooling Characteristic [Condition] Room temperature: 81°F (DBT), 66°F (WBT) Operation condition: High fan speed Piping Length: 24.6ft Comp

46  Piping Length Characteristic Cooling [Condition] Room temperature: 81°F (DBT), 66°F (WBT) Operation condition: High fan speed Outdoor tempe

47  Piping Length Characteristic Cooling [Condition] Room temperature: 81°F (DBT), 66°F (WBT) Operation condition: High fan speed Outdoor tempe

48  Piping Length Characteristic Cooling [Condition] Room temperature: 81°F (DBT), 66°F (WBT) Operation condition: High fan speed Outdoor tempe

49  Heating Characteristic [Condition] Room temperature: 68°F (DBT) Operation condition: High fan speed Piping Length: 24.6ft Compressor Freq:

5 2. Specifications 2.1 CU-2E18NBU Item Unit OUTDOOR UNIT Indoor Unit Combination 3.2kW + 3.2kW Power Source 1 Phase, 208 – 230V, 60Hz (Power

50  Heating Characteristic [Condition] Room temperature: 68°F (DBT) Operation condition: High fan speed Piping Length: 24.6ft Compressor Freq:

51  Heating Characteristic [Condition] Room temperature: 68°F (DBT) Operation condition: High fan speed Piping Length: 24.6ft Compressor Freq:

52  Piping Length Characteristic Heating [Condition] Room temperature: 68°F (DBT) Operation condition: High fan speed Outdoor temperature: 47°F

53  Piping Length Characteristic Heating [Condition] Room temperature: 68°F (DBT) Operation condition: High fan speed Outdoor temperature: 47°F

54  Piping Length Characteristic Heating [Condition] Room temperature: 68°F (DBT) Operation condition: High fan speed Outdoor temperature: 47°F

55 18. Exploded View and Replacement Parts List Note The above exploded view is for the purpose of parts disassembly and replacement. The non-numb

56 REF. NO. DESCRIPTION & NAME Q’TY CU-2E18NBU REMARK 1 BASE PAN ASS'Y 1 CWD52K1239A 2 SOUND-PROOF BOARD 1 CWH151230 3 FAN MOTO

57 74 ACCESSORY CO. (DRAIN ELBOW) 1 CWG87C900 76 NUT - TERMINAL COVER 2 CWH7080300J 77 TERMINAL COVER 1 CWH171035 78 TUBE ASS'Y (L

6 Item Unit OUTDOOR UNIT Air Volume High m3/min (ft3/min) 37.2 (1313) Refrigerant Control Device Expansion Valve Refrigerant Oil FV50S Ref

7 Indoor unit combination Cooling Capacity (kW) Input Power (W) Outdoor Unit Operation Class (kW) Operation Mode Rating Min ~ Max Rating Min ~ Ma

8 3. Dimensions

9 4. Refrigeration Cycle Diagram