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Please file and use this manual together with the service manual for Model No. CS-S9NKUW-1, CS-S12NKUW-1 Order No. PHAAM1111084C1
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 refrigerantion circuit.
TABLE OF CONTENTS
1. Safety Precautions.............................................3
2. Specification .......................................................5
3. Dimensions .........................................................7
4. Refrigeration Cycle Diagram.............................8
5. Block Diagram ....................................................9
6. Wiring Connection Diagram............................10
7. Electronic Circuit Diagram ..............................11
8. Printed Circuit Board .......................................12
8.1
Main Printed Circuit Board .........................12
8.2
Noise Filter Printed Circuit Board...............13
WARNING
PRECAUTION OF LOW TEMPERATURE
9. Installation Information ...................................14
10. Installation Instruction.....................................15
11. Operation Control.............................................20
9.1
Check Points ..............................................14
10.1
SELECT THE BEST LOCATION ...............15
10.2
INSTALL THE OUTDOOR UNIT................17
10.3
CONNECT THE PIPING ............................17
10.4
EVACUATION OF THE EQUIPMENT .......18
OUTDOOR UNIT........................................18
10.6
HEAT INSULATION ...................................19
© Panasonic HA Air-Conditioning (M) Sdn. Bhd. 2011.
Unauthorized copying and distribution is a violation of law.
Order No: PHAAM1111121A1
Outdoor Unit
CU-2S18NBU-1
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Related Manuals for Panasonic CU-2S18NBU-1
Summary of Contents for Panasonic CU-2S18NBU-1
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Page 1: Table Of Contents
OUTDOOR UNIT........18 10.6 HEAT INSULATION ........19 8. Printed Circuit Board ........12 Main Printed Circuit Board ......12 11. Operation Control..........20 Noise Filter Printed Circuit Board....13 © Panasonic HA Air-Conditioning (M) Sdn. Bhd. 2011. Unauthorized copying and distribution is a violation of law. - Page 2 12.12 Valve close detection control......23 12.13 Compressor discharge high pressure protection control ........23 13. Servicing Mode ..........24 13.1 Pump Down Operation .......24 13.2 Test Operation..........24 13.3 Wiring Error Check ........24 13.4 Power Save Mode ........25 13.5 Mode priority function .........25 14.
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Page 3: Safety Precautions
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. •... - Page 4 WARNING During pump down operation, stop the compressor before remove the refrigeration piping. (Removal of refrigeration piping while compressor is operating and valves are opened condition will cause suck-in of air, abnormal high pressure in refrigeration cycle and result in explosion, injury etc.). After completion of installation or service, confirm there is no leakage of refrigerant gas.
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Page 5: Specification
2. Specification Model Outdoor Unit CU-2S18NBU-1 Indoor Unit Combination 3.2kW + 3.2kW 1 Phase, 208-230V, 60Hz Power Source (Power supply from outdoor unit) 4.89 (2.10 ~ 5.86) Capacity BTU/h 16700 (7200 ~ 20000) Running Current 7.6 - 6.9 Power Input 1.45 (0.39 ~ 1.84) - Page 6 (as shown in the table above) Example: The indoor units’ combination below is possible to connect to CU-2S18NBU-1. (Total nominal capacity of indoor units is between 5.6 kW to 6.4 kW) 1) Two CS-S9NKUW-1 only. (Total nominal cooling capacity is 5.6 kW) 2) One CS-S9NKUW-1 and one CS-S12NKUW-1.
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Page 7: Dimensions
3. Dimensions... -
Page 8: Refrigeration Cycle Diagram
4. Refrigeration Cycle Diagram... -
Page 9: Block Diagram
5. Block Diagram... -
Page 10: Wiring Connection Diagram
6. Wiring Connection Diagram... -
Page 11: Electronic Circuit Diagram
7. Electronic Circuit Diagram... -
Page 12: Printed Circuit Board
8. Printed Circuit Board Main Printed Circuit Board... -
Page 13: Noise Filter Printed Circuit Board
Noise Filter Printed Circuit Board... -
Page 14: Installation Information
OD to refrigerant supply length length additional wire size wire size unit each ID Liquid Outdoor (OD): CU-2S18NBU-1 Indoor (ID): 2 UNITS OF CS-S9NKUW-1 208/230V Outdoor (OD): CU-2S18NBU-1 ø3/8" ø1/4" 60 Hz Indoor (ID): 2 UNITS OF 16700 R410A 24.6 ft 49.2 ft... -
Page 15: Installation Instruction
10. Installation Instruction 10.1 SELECT THE BEST LOCATION 10.1.1 OUTDOOR UNIT 10.1.2 Outdoor Unit Installation • If an awning is built over the unit to prevent direct Diagram sunlight or rain, be careful that heat radiation from the condenser is not obstructed. •... - Page 16 Outdoor Unit Installation Guidelines • Where a wall or other obstacle is in the path of outdoor unit’s intake or exhaust airflow, follow the installation guidelines below. • For any of the below installation patterns, the wall height on the exhaust side should be 47 1/4" or less.
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Page 17: Install The Outdoor Unit
10.2 INSTALL THE OUTDOOR UNIT • After selecting the best location, start installation to Indoor/Outdoor Unit Installation Diagram. 1. Fix the unit on concrete or rigid frame firmly and horizontally with bolt nut (ø13/32"). 2. When installing on a roof, please consider strong winds and earthquakes. Please fasten the installation stand firmly with bolt or nails. -
Page 18: Evacuation Of The Equipment
10.4 EVACUATION OF THE EQUIPMENT WHEN INSTALLING AN AIR CONDITIONER, BE SURE TO EVACUATE THE AIR INSIDE THE INDOOR UNIT AND PIPES in the following procedure. 1. Connect a charging hose with a push pin to the Low side of a charging set and the service port of the gas side 3-way valve. -
Page 19: Heat Insulation
8. For wire stripping and connection requirement, refer to the diagram below. 9. Secure the power supply cord and connecting cables onto the control board with the holder. 10. Attach the control board cover (metal and resin) and valve cover back to the original position with screw. 10.6 HEAT INSULATION Use a material with good heat-resistant properties as the heat insulation for Liquid-side pipes... -
Page 20: Operation Control
11. Operation Control 11.1 Cooling Operation 11.1.1 Outdoor fan control • When cooling operation is enabled, based on outdoor ambient temperature, fan motor control will be adjusted according to figure below: 11.1.2 Powerful Operation 1 • During cooling operation, this control is to concentrate outdoor unit capability to the powerful operation enabled indoor unit by temporary stop the capability supply to low load demand indoor units. - Page 21 12. Protection Control 12.1 Freeze Prevention control (Cool) • When received freeze prevention signal from indoor unit, the compressor frequency changes according to indoor heat exchanger temperature. • When indoor unit request capability OFF due to freeze condition , immediately the capability supply to targeted indoor unit stops.
- Page 22 If the running current does not exceed X value for 5 seconds, compressor frequency will increase. • However, if total outdoor unit running current exceeds Y value, compressor will be stopped immediately for 3 minutes. CU-2S18NBU-1 Operation Mode X (A) Y (A) 14.0...
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Page 23: Valve Close Detection Control
12.10 Compressor Protection Control (Gas leak detection control 1) • Control start conditions For 5 minutes, the compressor continuously operates and total current is low. During Cooling or Soft Dry operation: Indoor intake temperature — indoor piping temperature is below 39.2°F. •... -
Page 24: Servicing Mode
13. Servicing Mode 13.1 Pump Down Operation • Operate the pump down according to the following procedures. Confirm the valve on the liquid side and gas side is open. Press PUMP DOWN switch (SW1) on the display printed circuit board for more than 5 seconds. -
Page 25: Power Save Mode
NOTE 1. For two rooms, LED 4 and 5 are not illuminated after wiring operation complete. 2. If the outdoor air temperature is less than 41°F or unit has abnormality, wiring operation will not start. 3. After wiring check operation is complete, LED indication will illuminated until normal operation starts. 4. -
Page 26: Troubleshooting Guide
14. Troubleshooting Guide 14.1 Self Diagnosis Function • The display screen of wireless remote control unit and the self-diagnosis LEDs (green) on the outdoor printed circuit board in the outdoor unit can be used to identify the location of the problem. Refer to the table below to identify and solve the cause of the problem, and then re-start the air conditioner system. - Page 27 Abnormality Diagnosis Abnormality Protection Problem Check location display Protection Judgment Operation control • Check indoor heat Indoor high exchanger Indoor high pressure ○ ○ ○ • Air filter dirty pressure ― ― protection protection • Air circulation (Heating) short circuit •...
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Page 28: Disassembly And Assembly Instructions
15. Disassembly and Assembly Instructions WARNING High Voltages are generated in the electrical parts area by the capacitor. Ensure that the capacitor has discharged sufficiently before proceeding with repair work. Failure to heed this caution may result in electric shocks. 15.1 Outdoor Unit Removal Procedure Caution! When handling electronic controller, be careful of electrostatic discharge. - Page 29 15.1.3 Removing the Control P.C. Board 6. Remove the drip proof cover. 7. Disconnect the connectors (lead wires of the compressor, sensor, and others). 8. Remove the screw at the right side of the control box, and pull out the entire control box. 9.
- Page 30 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.
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Page 31: Technical Data
16. Technical Data 16.1 Operation Characteristics 16.1.1 CS-S9NKUW-1 CU-2S18NBU-1 • Cooling Characteristic Room temperature: 81°F (DBT), 66°F (WBT) Operation condition: High fan speed Piping length: 24.6ft Compressor Freq:... - Page 32 • Piping Length Characteristic Room temperature: 81°F (DBT), 66°F (WBT) Operation condition: High fan speed Outdoor temperature: 95°F (DBT) Compressor Freq:...
- Page 33 16.1.2 CS-S9NKUW-1x2 CU-2S18NBU-1 • Cooling Characteristic Room temperature: 81°F (DBT), 66°F (WBT) Operation condition: High fan speed Piping length: 24.6ft Compressor Freq:...
- Page 34 • Piping Length Characteristic Room temperature: 81°F (DBT), 66°F (WBT) Operation condition: High fan speed Outdoor temperature: 95°F (DBT) Compressor Freq:...
- Page 35 16.1.3 CS-S12NKUW-1 CU-2S18NBU-1 • Cooling Characteristic Room temperature: 81°F (DBT), 66°F (WBT) Operation condition: High fan speed Piping length: 24.6ft Compressor Freq:...
- Page 36 • Piping Length Characteristic Room temperature: 81°F (DBT), 66°F (WBT) Operation condition: High fan speed Outdoor temperature: 95°F (DBT) Compressor Freq:...
- Page 37 16.1.4 CS-S12NKUW-1x2 CU-2S18NBU-1 • Cooling Characteristic Room temperature: 81°F (DBT), 66°F (WBT) Operation condition: High fan speed Piping length: 24.6ft Compressor Freq:...
- Page 38 • Piping Length Characteristic Room temperature: 81°F (DBT), 66°F (WBT) Operation condition: High fan speed Outdoor temperature: 95°F (DBT) Compressor Freq:...
- Page 39 16.1.5 CS-S12NKUW-1+CS-S9NKUW-1 CU-2S18NBU-1 • Cooling Characteristic Room temperature: 81°F (DBT), 66°F (WBT) Operation condition: High fan speed Piping length: 24.6ft Compressor Freq:...
- Page 40 • Piping Length Characteristic Room temperature: 81°F (DBT), 66°F (WBT) Operation condition: High fan speed Outdoor temperature: 95°F (DBT) Compressor Freq:...
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Page 41: Exploded View And Replacement Parts List
17. Exploded View and Replacement Parts List Note The above exploded view is for the purpose of parts disassembly and replacement. The non-numbered parts are not kept as standard service parts. - Page 42 REF. NO. DESCRIPTION & NAME QTY. CU-2S18NBU-1 REMARK BASE PAN ASS'Y CWD52K1240A SOUND-PROOF BOARD CWH151230 FAN MOTOR BRACKET CWD541127 CONDENSER COMPLETE CWB32C2925 FAN MOTOR EHDS80CAC PROPELLER FAN CWH00K1006 NUT - PROPELLER FAN CWH561038J COMPRESSOR 5KD184XAB21 PACKING CWB81043 ANTI - VIBRATION BUSHING...
- Page 43 REF. NO. DESCRIPTION & NAME QTY. CU-2S18NBU-1 REMARK SHOCK ABSORBER (LEFT) CWG712880 C.C.CASE CWG565609 TERMINAL COVER CWH171035 NUT - TERMINAL COVER CWH7080300J (Note) • All parts are supplied from PHAAM, Malaysia (Vendor Code: 00029488). • “O” marked parts are recommended to be kept in stock.