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Panasonic CS-KS12NB41 & CZ-18BT1U + CU-KS12NK1A Technical & Service Manual

Manual is about: DC INVERTER SPLIT SYSTEM AIR CONDITIONER

Summary of CS-KS12NB41 & CZ-18BT1U + CU-KS12NK1A

  • Page 1

    Technical & service manual cs-ks12nb41 & cz-18bt1u + cu-ks12nk1a cs-ks18nb4uw & cz-18bt1u + cu-ks18nku cs-ks18nb4uw & cz-18bt1u + cu-ks18nkua dc inverter split system air conditioner indoor unit outdoor model no. Product code no. 1 852 361 18 1 852 361 16 1 852 361 19 cs-ks12nb41 (body) & cz-18bt1u ...

  • Page 2: Safety Precautions

    • before doing repair work, please read the " safety precautions" carefully and fully understand them. • the precautionary items here are divided into " warning" and " caution" items. Items in particular which may cause death or serious injury to the service personnel if the work is not performed co...

  • Page 3

    Warning if refrigerant gas blows off during the work, do not touch the refrigerant gas as it may cause frostbite. If refrigerant gas leaks during the work, ventilate the room. If refrigerant gas catches fire, harmful gas may be generated. Do not mix any gas other than the specified refrigerant gas i...

  • Page 4: Table of Contents

    Table of contents safety precautions table of contents 1. Operating range 2. Specifications 2-1. Unit specifications 2-2. Major component specifications 2-3. Other component specifications 3. Dimensional data 4. Refrigerant flow diagram 4-1. Refrigerant flow diagram 5. Performance data 5-1. Temperat...

  • Page 5

    10. Checking electrical components 10-1. Measurement of insulation resistance 10-2. Checking continuity of fuse on pcb ass'y 11. Refrigerant r410a: special precautions when servicing unit 11-1. Characteristics of new refrigerant r410a 11-2. Checklist before servicing 11-3. Tools specifically for r41...

  • Page 6: 1.  Operating Range

    95 °f db / 71 °f wb 67 °f db / 57 °f wb 1. Operating range maximum minimum 115 °f db 67 °f db temperature indoor air intake temp. Outdoor air intake temp. Cooling 95 °f db / 71 °f wb 67 °f db / 57 °f wb maximum minimum 115 °f db 0 °f db temperature indoor air intake temp. Outdoor air intake temp. Co...

  • Page 7: 2.  Specifications

    Indoor unit cs-ks18nb4uw & cz-18bt1u outdoor unit cu-ks18nku 2-1-1. Vertical db-a db-a indoor : hi/me/lo outdoor : hi air filter compressor refrigerant / amount charged at shipment ibs (g) refrigerant control 8.3 1,860 ( 1.2 to 8.3 ) ( 250 to 1,860 ) 17,500 5.15 ( 4,000 to 17,500 ) ( 1.2 to 5.15 ) c...

  • Page 8

    Indoor unit cs-ks18nb4uw & cz-18bt1u outdoor unit cu-ks18nku data subject to change without notice. Remarks: rating conditions are: cooling: indoor air temperature 80 °f db / 67 °f wb outdoor air temperature 95 °f db / 75 °f wb shipping volume net shipping weight ib. (kg) ib. (kg) cu.Ft (m 3 ) inch ...

  • Page 9

    Indoor unit cs-ks18nb4uw & cz-18bt1u outdoor unit cu-ks18nku 2-1-2. Vertical db-a db-a indoor : hi/me/lo outdoor : hi air filter compressor refrigerant / amount charged at shipment ibs (g) refrigerant control 9.1 1,860 ( 1.2 to 9.1 ) ( 250 to 1,860 ) 17,500 5.15 ( 4,000 to 17,500 ) ( 1.2 to 5.15 ) c...

  • Page 10

    Indoor unit cs-ks18nb4uw & cz-18bt1u outdoor unit cu-ks18nku data subject to change without notice. Remarks: rating conditions are: cooling: indoor air temperature outdoor air temperature shipping volume net shipping weight ib. (kg) ib. (kg) cu.Ft (m 3 ) inch (mm) dimensions & weight (indoor unit) u...

  • Page 11

    Indoor unit cs-ks12nb41 & cz-18bt1u outdoor unit cu-ks12nk1a 2-1-3. Vertical db-a db-a indoor : hi/me/lo outdoor : hi air filter compressor refrigerant / amount charged at shipment ibs (g) refrigerant control 12.6 1,260 ( 2.5 to 12.6 ) ( 250 to 1,260 ) 11,900 3.5 ( 3,000 to 11,900 ) ( 0.9 to 3.5 ) c...

  • Page 12

    Indoor unit cs-ks12nb41 & cz-18bt1u outdoor unit cu-ks12nk1a data subject to change without notice. Remarks: rating conditions are: cooling: indoor air temperature outdoor air temperature shipping volume net shipping weight ib. (kg) ib. (kg) cu.Ft (m 3 ) inch (mm) dimensions & weight (indoor unit) u...

  • Page 13

    Indoor unit cs-ks18nb4uw & cz-18bt1u outdoor unit cu-ks18nkua 2-1-4. Vertical db-a db-a indoor : hi/me/lo outdoor : hi air filter compressor refrigerant / amount charged at shipment ibs (g) refrigerant control 8.3 1,860 ( 1.2 to 8.3 ) ( 250 to 1,860 ) 17,500 5.15 ( 4,000 to 17,500 ) ( 1.2 to 5.15 ) ...

  • Page 14

    Indoor unit cs-ks18nb4uw & cz-18bt1u outdoor unit cu-ks18nkua data subject to change without notice. Remarks: rating conditions are: cooling: indoor air temperature outdoor air temperature shipping volume net shipping weight ib. (kg) ib. (kg) cu.Ft (m 3 ) inch (mm) dimensions & weight (indoor unit) ...

  • Page 15

    Indoor unit cs-ks18nb4uw & cz-18bt1u outdoor unit cu-ks18nkua 2-1-5. Vertical db-a db-a indoor : hi/me/lo outdoor : hi air filter compressor refrigerant / amount charged at shipment ibs (g) refrigerant control 9.1 1,860 ( 1.2 to 9.1 ) ( 250 to 1,860 ) 17,500 5.15 ( 4,000 to 17,500 ) ( 1.2 to 5.15 ) ...

  • Page 16

    Indoor unit cs-ks18nb4uw & cz-18bt1u outdoor unit cu-ks18nkua data subject to change without notice. Remarks: rating conditions are: cooling: indoor air temperature outdoor air temperature shipping volume net shipping weight ib. (kg) ib. (kg) cu.Ft (m 3 ) inch (mm) dimensions & weight (indoor unit) ...

  • Page 17

    Indoor unit (body) cs-ks12nb41 indoor unit (panel) cz-18bt1u 2-2. Major component specifications 2-2-1. Indoor unit mp24zn-12v ... 2 flap motor type stepping motor rating model ... Q'ty coil resistance ohm (ambient temp. 77 °f (25 °c)) each pair of terminal : 380 +/- 7% dc 12v pld-12115st-1 ... 1 ac...

  • Page 18

    Indoor unit (body) cs-ks18nb4uw indoor unit (panel) cz-18bt1u mp24zn-12v ... 2 flap motor type stepping motor rating model ... Q'ty coil resistance ohm (ambient temp. 77 °f (25 °c)) each pair of terminal : 380 +/- 7% dc 12v aluminum plate fin / copper tube 2 18.1 2.94 (0.273) face area coil rows fin...

  • Page 19

    Outdoor unit cu-ks18nku control pcb control circuit fuse controls part no. Microprocessor 250v 25a cb-cu-ks18nku data subject to change without notice. Pints (cc) wht - blu : blu - red : red - wht : 77.5 77.5 77.5 micro f vac external finish acrylic baked-on enamel finish fv50s ... 0.74 (350) - - in...

  • Page 20

    Outdoor unit cu-ks12nk1a control pcb control circuit fuse controls part no. Microprocessor 125v 25a cb-cu-ks12nk1a data subject to change without notice. Pints (cc) wht - blu : blu - red : red - wht : 77.5 77.5 77.5 micro f vac external finish acrylic baked-on enamel finish fv50s ... 0.68 (320) - - ...

  • Page 21

    Outdoor unit cu-ks18nkua control pcb control circuit fuse controls part no. Microprocessor 250v 25a cb-cu-ks18nkua data subject to change without notice. Pints (cc) wht - blu : blu - red : red - wht : 77.5 77.5 77.5 micro f vac external finish acrylic baked-on enamel finish fv50s ... 0.74 (350) - - ...

  • Page 22

    2-3. Other component specifications indoor unit cs-ks12nb41 & cz-18bt1u cs-ks18nb4uw & cz-18bt1u outdoor unit cu-ks18nku cu-ks12nk1a cu-ks18nkua 0 32 50 68 86 104 122 140 158 176 194 (0) (10) (20) (30) (40) (50) (60) (70) (80) (90) 40 60 80 100 120 140 160 180 200 20 50 1 0 2 3 4 5 6 7 8 9 10 59 68 ...

  • Page 23: 3.  Dimensional Data

    3. Dimensional data indoor unit cs-ks12nb41 & cz-18bt1u cs-ks18nb4uw & cz-18bt1u 6-5/16 6-11/16 1-3/16 (30) 4-19/32 1-25/32 1-25/32 2-3/32 8-15/32 22-5/8 (575) 11-5/32 (283) 3 6 5 less than 31/32 less than 31/32 3-5/8 22-5/8 (575) 12-7/8 suspension bolt pitch suspension bolt pitch 21-1/32 (534) 21-1...

  • Page 24

    10-13/16 3-19/32 id:23/32 2-id:15/16 21-3/16 6-3/32 4-9/32 2-5/32 narrow tube service valve dia.1/4" (6.35) wide tube service valve dia.3/8" (9.52) 3-19/32 15/32 10-7/16(265) 11-13/32 12-7/16 unit : inch (mm) (852-0-0010-12600-0) 28-11/32 (720) 2-1/8 21-9/16 (548) 5/8 outdoor unit cu-ks12nk1a 24.

  • Page 25

    Unit : inch (mm) (852-0-0010-13300-0) narrow tube service valve dia.1/4" (6.35) wide tube service valve dia.1/2" (12.70) 4-3/8 2-5/32 6-17/32 5-23/32 3/32 26-3/8 (670) 23/32 1-13/16 34-21/32 (880) 23-15/16 5-11/32 15/32 1 1-7/32 (285) 12-7/32 13-5/32 11-17/32 id:23/32 2-id:15/16 1-3/8 2-17/32 2-13/3...

  • Page 26

    Wide tube narrow tube heat exchanger indoor unit strainer o.D. 3/8" (9.52 mm) o.D. 1/4" (6.35 mm) 4. Refrigerant flow diagram 4-1. Refrigerant flow diagram indoor unit cs-ks12nb41 & cz-18bt1u outdoor unit cu-ks12nk1a compressor accumulator wide tube service valve narrow tube service valve heat excha...

  • Page 27

    Wide tube narrow tube indoor unit o.D. 1/2" (12.7mm) o.D. 1/4" (6.35 mm) indoor unit cs-ks18nb4uw & cz-18bt1u outdoor unit cu-ks18nku cu-ks18nkua heat exchanger strainer compressor accumulator wide tube service valve narrow tube service valve heat exchanger muffler cooling cycle outdoor unit electri...

  • Page 28: 5.  Performance Data

    Hi fan lo fan cooling characteristics (rh : 46%, indoor fan speed : high fan) (60hz, 115v) (1) low pressure performance chart (2) operating current performance chart (3) indoor discharge air performance chart check each performance value in test-run mode. Electrical performance values represent a co...

  • Page 29

    • check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value. Note cooling characteristics (rh : 46%, indoor fan speed : high fan) (60hz, 230v) (1) low pressure performance chart (2) operating current performance chart (3) indoor discharge ...

  • Page 30

    5-2. Cooling capacity indoor unit : cs-ks12nb41 & cz-18bt1u outdoor unit : cu-ks12nk1a power supply : 115v single phase 60hz tc : total cooling capacity (btu/h) shc : sensible heat capacity (btu/h) 1. Rating conditions (#) : indoor unit entering air temp. 80 °f (26.7 °c) db / 67 °f (19.4 °c) wb : ou...

  • Page 31

    Indoor unit : cs-ks18nb4uw & cz-18bt1u outdoor unit : cu-ks18nku or cu-ks18nkua power supply : 230v single phase 60hz 1. Rating conditions (#) : indoor unit entering air temp. 80 °f (26.7 °c) db / 67 °f (19.4 °c) wb : outdoor ambient temp. 95 °f (35 °c) db 2. 3. Above data represents the value when ...

  • Page 32

    5-3. Cooling capacity (low ambient) indoor unit : cs-ks12nb41 & cz-18bt1u outdoor unit : cu-ks12nk1a power supply : 115v single phase 60hz tc : total cooling capacity (btu/h) shc : sensible heat capacity (btu/h) 1. 2. Above data represents the value when the operation frequency of a compressor is fi...

  • Page 33

    Indoor unit : cs-ks18nb4uw & cz-18bt1u outdoor unit : cu-ks18nkua power supply : 230v single phase 60hz rating capacity: 17,500 btu/h air flow rate: 341 cfm indoor outdoor ent. Temp. O f ( o c) ambient temp. O f ( o c) wb db 0 5 15 25 35 45 55 (-17.8) (-15.0) (-9.4) (-3.9) (1.7) (7.2) (12.8) tc 13,4...

  • Page 34: 6.  Electrical Data

    6. Electrical data 6-1. Electrical characteristics indoor unit cs-ks12nb41 & cz-18bt1u outdoor unit cu-ks12nk1a indoor unit outdoor unit complete unit fan motor fan motor + compressor performance at 115v single-phase 60hz rating conditions running amp. 0.21 power input 18 12.39 1,242 cooling 12.6 1,...

  • Page 35

    Indoor unit cs-ks18nb4uw & cz-18bt1u outdoor unit cu-ks18nku indoor unit outdoor unit fan motor fan motor + compressor performance at 230v single-phase 60hz rating conditions running amp. A 0.15 power input w a w a w a w 22 8.15 1,838 rating conditions: indoor air temperature: 80 °f (26.7 °c) db / 6...

  • Page 36

    6-2. Electric wiring diagrams indoor unit cs-ks12nb41 & cz-18bt1u cs-ks18nb4uw & cz-18bt1u 8fa2-5250-46900-2 1 2 3 4 5 6 1 2 3 4 5 6 fm dp f an mo t o r drain pump dcm 6p (blu) 6p (wht) dp 3p (blu) 3p (red) pwm/po w 7p (red) pwm/po w 7p (red) rc 4p (wht) ind 7p (wht) fs 3p (red) flap 5p (wht) r oom ...

  • Page 37

    Outdoor unit cu-ks12nk1a 8fa2-5251-12300-2 37.

  • Page 38

    Outdoor unit cu-ks18nku cu-ks18nkua 8fa2-5251-12000-2 25a controller dcfm mv0 fan motor 1 2 3 4 5 6 7 blk wht red blu yel blk wht red blu yel w w w w w w w w 1 2 3 4 5 5 1 2 4 3 1 2 1 2 1 2 3 4 5 6 7 1 2 4 5 6 7 3 1 2 1 2 3 4 3 4 5 5 1 2 1 2 3 3 1 2 1 2 1 2 3 4 1 2 4 3 1 2 3 4 1 2 4 3 2 1 2 1 ferrit...

  • Page 39: 7.  Maintenance

    Acl (reset) button 1hr. Timer button on/off operation button high power button test run mode self-diagnostic mode address setting mode fig. 1 fig. 2 fig. 3 tab acl button 7. Maintenance 7-1. Address setting of the remote controller the address can be set in order to prevent interference between remo...

  • Page 40

    One of the two types of connectors illustrated at left is used. Their basic structure is the same for each. How to disconnect hold the resin connector cover, and pull the connector off. You cannot disconnect the connector by pulling the wire since it is locked inside. Always hold the cover to discon...

  • Page 41

    7-3. Disassembly procedure 7-3-1. Remove the air intake grill. (1) slide the 2 latches each to the corresponding arrow direction. (fig. 1 and fig. 2) open downward the air intake grill located on the latch side. (2) undo the air intake grill drop preventive hook. (fig. 3) undo the 2 hinges for the g...

  • Page 42

    Note 7-3-3. Remove the ceiling panel. (1) open the clamp (4 locations) and remove the 2 lead wires from the clamps. (fig. 6) (2) remove the 4 screws fixing the corner cover (at 3 locations) and indicator cover (at 1 location). (fig. 6) (3) press the center 1 of the cover and remove the cover with th...

  • Page 43

    1 2 3 7-3-4. Remove the indoor air temperature sensor. (1) disconnect the connector cn08 (room 2p) in the control box and remove the indoor air temperature sensor. (fig. 10) 7-3-5. Remove the power box and control box. (1) remove a screw and remove the terminal cover. (fig. 11) (2) remove the 2 scre...

  • Page 44

    1 2 3 (4) disconnect the connector cn07 (dp 2p) in the power box. (fig. 13) remove a screw and disconnect the ground cable. (fig. 13) (5) disconnect the connector cn03 (dcm 6p) in the power box. (fig. 14) (6) remove the 4 screws and remove the power box. (fig. 14) (7) disconnect the connectors cn06 ...

  • Page 45

    For the removal of the following components, perform any work after removing the indoor unit (main body) from the ceiling. Main body lower section heat exchanger sensor drain pump float switch turbo fan fan motor heat exchanger 1. Perform the work after draining the water to prevent the water leakag...

  • Page 46

    7-3-7. Remove the heat exchanger sensor. (1) remove the heat exchanger sensor from the sensor holder. (fig. 19) 7-3-8. Remove the drain pump and float switch. (1) remove the 2 screws (fig. 20) (2) loosen the clamp and disconnect the drain hose from the drain pump. (fig. 20) (3) remove the drain pump...

  • Page 47

    7-3-9. Remove the turbo fan and fan motor. (1) remove a nut and remove the turbo fan. (fig. 22) (2) remove the 2 screws and 3 nuts, and remove the fan motor. (fig. 23) 7-3-10. Remove the heat exchanger. (1) remove the 3 screws. (fig. 24) (2) remove the 3 screws. (fig. 25) (3) remove the heat exchang...

  • Page 48: 8.  Functions

    8. Functions 8-1. Operation functions emergency operation sensor dry during dry operation, the system adjusts the room temperature and fan speed according to the conditions in the room, in order to maintain a comfortable room environment. Sensor dry operation dry operation is as shown in the figure ...

  • Page 49

    High power night setback lamp colors timer backup this function acts to raise the power but keeps the ac system in the same operating mode. This function is set with the high power button on the remote controller. (it can be set regardless of the temperature and fan speed settings.) high power opera...

  • Page 50

    A. Area: automatic capacity control b. When the temperature drops below point a, the operation frequency is reduced by a certain proportion. C. Area: frequency increase is prohibited. D. When the temperature reaches point c or above, freezing prevention is ended and control is the same as in the a a...

  • Page 51

    Test run mode self-diagnostics mode 9. Troubleshooting (before calling for service) 9-1. Precautions before performing inspection or repair note after checking the self-diagnostics monitor, turn the power off before starting inspection or repair. High-capacity electrolytic capacitors are used inside...

  • Page 52

    Since the indications cover various units, the corresponding parts listed below may not be present in some models. (1) self-diagnostics lamps (1) drain pump failure (2) fs failure (3) choked drain hose 8512-5261-99100-1 remote control receiver operation lamp timer lamp operation button high power la...

  • Page 53

    (2) if the self-diagnostics function fails to operate check the indoor unit. Is the fuse blown? Replace the controller. Replace the circuit board or the fuse. No indicators illuminate and the indoor fan does not rotate. Check the power voltage. • • normal blown 9-3. Checking the indoor and outdoor u...

  • Page 54

    (3) serial communication error identification procedure refer to "method of self-diagnostics" for the self-diagnostics procedure. (3-1) condition: e01 if the lamps on the main body show the following conditions after the completion of self-diagnostics, a communication error between the indoor unit a...

  • Page 55

    What is the latest self-diagnosis result ? Condition: e12 defect in the outdoor unit p.C. Board. Condition: e01 defect or connection error in the inter-unit cable defect in the indoor unit p.C. Board ( continued from the previous page a. ) a ( continued from the previous page b. ) b 1 2 4 3 5 6 1 2 ...

  • Page 56

    (3-2) condition: e12 troubleshooting serial communication 1. Turn off the power and wait until the power lamp (led) of the outdoor unit controller is turned off. 2. Disconnect the cable from the terminal 3 on the indoor unit terminal strip. (fig. 7) defect in the indoor unit p.C. Board defect in the...

  • Page 57

    [trouble symptom 3] motor rotates for some time (several seconds), but then quickly stops, when the indoor unit operates. (there is trouble in the system that provides feedback of motor rotation speed from the motor to the indoor unit controller.) [trouble symptom 4] fan motor rotation speed does no...

  • Page 58

    9-4-2. Outdoor fan motor this outdoor dc fan motor contains an internal control pcb. Therefore, it is not possible to measure the coil resistance, and the following procedure should be used to check the motor. Perform the trouble diagnosis by test run mode described on installation instructions. [tr...

  • Page 59

    9-5. Noise malfunction and electromagnetic interference an inverter a/c operates using pulse signal control and high frequencies. Therefore, it is susceptible to the effects of external noise, and is likely to cause electromagnetic interference with nearby wireless devices. A noise filter is install...

  • Page 60

    Insulation tester probe clip ground wire terminal plate copper tube or metallic part clip insulation tester probe fig. 1 fig. 2 fig. 3 fig. 4 copper tube or metallic part clip insulation tester probe clip insulation tester probe metallic part from fan motor, compressor and other parts 10. Checking e...

  • Page 61

    Fuse pcb ass'y fig. 5 fig. 6 fuse 10-2. Checking continuity of fuse on pcb ass'y remove the pcb ass'y from the electrical component box. Then pull out the fuse from the pcb ass'y. (fig. 5) check for continuity using a multimeter as shown in fig. 6. 61.

  • Page 62: 11.  Refrigerant R410A:

    11. Refrigerant r410a: special precautions when servicing unit 11-1. Characteristics of new refrigerant r410a 11-1-1. What is new refrigerant r410a? R410a is a new refrigerant that contains two types of pseudo-non-azeotropic refrigerant mixture. Its refrigeration capacity and energy efficiency are a...

  • Page 63

    Tubing precautions refrigerant r410a is more easily affected by dust or moisture compared with r22, thus be sure to temporarily cover the ends of the tubing with caps or tape prior to installation. Never use 0.0276" (0.7 mm)-thick copper tubing or tubing which is less than 0.0315" (0.8 mm) in thickn...

  • Page 64

    11-3. Tools specifically for r410a for servicing, use the following tools for r410a gauge manifold charging hose gas leak detector refrigerant cylinder charging cylinder refrigerant recovery unit vacuum pump with anti-reverse flow (*1) (solenoid valve-installed type, which prevents oil from flowing ...

  • Page 65

    11-5. In case of compressor malfunction caution should the compressor malfunction, be sure to make the switch to a replacement compressor as quickly as possible. Use only the tools indicated exclusively for r410a. See "11-3. Tools specifically for r410a." 11-5-1. Procedure for replacing compressor (...

  • Page 66: No!

    Valve single valve charge liquid refrigerant with cylinder in up-side-down position. Single valve (with siphon tube) charge with cylinder in normal position. Liquid valve liquid charging cylinder open refrigerant cylinder liquid no! Caution never charge a large amount of liquid refrigerant at once t...

  • Page 67

    Length of tubing evacuation time less than 33 ft. (10 m) more than 10 minutes more than 33 ft. (10 m) more than 15 minutes 11-6. In case refrigerant is leaking caution never attempt to charge additional refrigerant when refrigerant has been leaking from the unit. Follow the procedure described below...

  • Page 68

    11-7. Charging additional refrigerant 11-7-1. When tubes are extended observe the proper amount of refrigerant as stated in this service manual or the installation manual that came with the indoor unit. Charge additional refrigerant in liquid state only. 11-8. Retro-fitting existing systems 11-8-1. ...

  • Page 70: Operating Instructions

    Operating instructions appendix a (852-6-4181-211-00-1) cs-ks12nb41 & cz-18bt1u + cu-ks12nk1a cs-ks18nb4uw & cz-18bt1u + cu-ks18nku cs-ks18nb4uw & cz-18bt1u + cu-ks18nkua a-1.

  • Page 71: Split System Air Conditioner

    Split system air conditioner model no. Panasonic corporation 1006 kadoma, kadoma city, osaka, japan 85264181211001 indoor units cs-ks12nb41 cs-ks18nb4uw outdoor units (for single use) cu-ks12nk1a cu-ks18nku cu-ks18nkua (for multiple use) cu-3ks19nbu cu-4ks24nbu cu-4ks31nbu operating instructions bef...

  • Page 72

    2 features this air conditioner is an inverter type unit that automatically adjusts capability as appropriate. Details on these functions are provided below; refer to these descriptions when using the air conditioner. • microprocessor controlled operation the interior compartment of the remote contr...

  • Page 73

    3 installation location • we recommend that this air conditioner be installed properly by qualified installation technicians in accordance with the installation instructions provided with the unit. • before installation, check that the voltage of the electric supply in your home or office is the sam...

  • Page 74

    4 names of parts this illustration is based on the external view of a standard model. Consequently, the shape may differ from that of the air conditioner which you have selected. This air conditioner consists of an indoor unit and an outdoor unit. You can control the air conditioner with the remote ...

  • Page 75

    5 remote controller (display) (1) operation mode mild dry .............................. Cool ..................................... Fan ........................................ (2) fan speed automatic operation ............... High ..................................... Medium...........................

  • Page 76

    6 remote controller transmitter when you press the buttons on the remote controller, the mark appears in the display to transmit the setting changes to the receiver in the air conditioner. Display information on the operating conditions is displayed while the remote controller is switched on. If the...

  • Page 77

    7 sensor a temperature sensor inside the remote controller senses the room temperature. (cover closed) clock button acl button (all clear) puts the remote controller into pre-operation status. Always press this button after replacing the batteries. On/off operation button this button is for turning ...

  • Page 78

    8 using the remote controller how to install batteries 1. Slide the cover in the direction indicated by the arrow and remove it. 2. Install two aaa alkaline batteries. Make sure the batteries point in the direction marked in the battery compartment. 3. Use a thin object such as the tip of a pen to p...

  • Page 79

    9 operation with the remote controller 1. Operation 2. Adjusting the fan speed a. Automatic fan speed simply set the fan speed selector button to the position. This automatically sets the best fan speed for the room temperature. B. Manual fan speed if you want to adjust fan speed manually during ope...

  • Page 80

    10 4. Night setback mode night setback mode is used for saving energy. Press the night setback button while unit is operating. The mark appears in the display. To release the night setback function, press the night setback button again. In cooling and dry mode: ( and ) 5. High power mode high power ...

  • Page 81

    11 1. How to set the present time (example) to set to 10:30 pm. 2. How to set the off time (example) to stop the air conditioner at 11:00 am. 3. How to set the on time (example) to start operation at 7:10 am. 4. How to set daily on/off repeat timer (example) to start operation at 7:10 am. And stop t...

  • Page 82

    12 using the 1-hour off timer 1. 1-hour off timer this function causes the unit to operate for one hour and then stop, regardless of whether the unit is on or off when this button is pressed. The indicator in the display indicates that this function is operating. Setting procedure: regardless of whe...

  • Page 83

    13 operation without the remote controller if you have lost the remote controller or it has trouble, follow the steps below. When the air conditioner is not running each time the operation button is pressed, the operation mode changes cyclically. The temperature is set to the room temperature minus ...

  • Page 84

    14 air filter the air filter collects dust and other particles from the air and should be cleaned once every 6 months. If the filter gets blocked, the efficiency of the air conditioner drops greatly. The frequency with which the filter should be cleaned depends on the environment in which the unit i...

  • Page 85

    15 troubleshooting (before calling for service) if your air conditioner does not work properly, first check the following points before requesting service. If it still does not work properly, contact your dealer or service center. Operating range the air conditioner is operable within the temperatur...

  • Page 86

    16 specifications model no. • for single use • for single use heating capacity operation sound unit dimensions (h×w×d) net weight power source cooling capacity kw btu/h kw btu/h inch(mm) lbs.(kg) cooling operation outdoor (hi) indoor(h/m/l) outdoor (hi) indoor(h/m/l) heating operation db(a) db(a) mo...

  • Page 87

    17 model no. • for multiple use • for multiple use heating capacity operation sound unit dimensions (h×w×d) net weight power source cooling capacity kw btu/h kw btu/h inch(mm) lbs.(kg) cooling operation (h/m/l) heating operation (h/m/l) db(a) db(a) indoor unit cs-ks18nb4uw 17,500 single-phase, 208-2...

  • Page 88: Installation Instructions

    A-2 installation instructions appendix b (852-6-4190-574-00-1) cs-ks12nb41 & cz-18bt1u + cu-ks12nk1a cs-ks18nb4uw & cz-18bt1u + cu-ks18nku cs-ks18nb4uw & cz-18bt1u + cu-ks18nkua.

  • Page 89: Installation Instructions

    This air conditioner uses the refrigerant r410a. External diameter of service port r410a: 5/16" split system air conditioner 85264190574001 2011 installation instructions note cv6233187785 contents page important! Please read before starting .................................. 2 1. General .............

  • Page 90

    2 important! Please read before starting this air conditioning system meets strict safety and operating standards. As the installer or service person, it is an important part of your job to install or service the system so it operates safely and efficiently. For safe installation and trouble-free op...

  • Page 91

    3 ‡ 8vhwkhioduhphwkrgirufrqqhfwlqjwxelqj ‡ $sso\uhiuljhudqwoxeulfdqwwrwkhpdwfklqjvxuidfhvri the flare and union tubes before connecting them, then tighten the nut with a torque wrench for a leak- free connection. ‡ &khfnfduhixoo\iruohdnvehiruhvwduwlqjwkhwhvwuxq ‡ 'rqrwohdnuhiuljhudqwzklohslslqjzruni...

  • Page 92

    4 printed on container box for unit & pvc tube connection for drain hose connection remarks q’ty for full-scale installation diagram 1 2 4 4 4 4 2 1 for temporarily suspending indoor unit from ceiling flare insulation for wide / narrow tube connection for wide / narrow tube / flare nut connection fo...

  • Page 93

    5 1-5. Additional materials required for installation 1. Refrigeration (armored) tape 2. Insulated staples or clamps for connecting wire (see local codes) 3. Putty 4. Refrigeration lubricant 5. Clamps or saddles to secure refrigerant tubing 2. Installation site selection 2-1. Indoor unit avoid: dire...

  • Page 94

    6 2-2. Outdoor unit avoid: heat sources, exhaust fans, etc. (fig. 3) damp, humid or uneven locations. Do: choose a place as cool as possible. Choose a place that is well ventilated. Install in a location where at least two sides are unob- structed, so that the flow of air at the intake port or exhau...

  • Page 95

    7 2-3. Baffle plate for the outdoor unit (low ambient cooling models only) it is recommended to use baffle plates for models cu-ks12nk1a and cu-ks18nkua. The baffle plates are not normally required for the other models. When the outdoor unit is installed in a position exposed to strong wind (such as...

  • Page 96

    8 (1) recommended dimensions of the baffle plates d e c j h k g b i p q a f n (2- 6.5 mm) 2- 1/4" (2- 6 mm) 2- 15/64" a b h c e f g g m l k i j d (4- 6.5 mm) 4- 1/4" fig. 5e for air intake for air discharge material to be used: metal plate with corrosion protection treatment plate thickness: 0.0394 ...

  • Page 97

    9 (1) recommended dimensions of the baffle plates d f e c j h l i b k q r a g o (3- 6.5 mm) 3- 1/4" (2- 6 mm) 2- 15/64" a b h c e f k i j g g d (4- 6.5 mm) 4- 1/4" for air intake for air discharge material to be used: metal plate with corrosion protection treatment plate thickness: 0.0394 to 0.0472"...

  • Page 98

    10 (3) installation procedure panel front panel side r panel side l fig. 5h fig. 5i 2. Air discharge baffle 1. Remove the panels front, side l and r from the unit and drill 4 holes of ø1/4 inch (6.5 mm) at the prescribed positions. 2. Install the windbaffle on the unit using field supply bolts and n...

  • Page 99

    11 panel top panel front panel side r panel side l fig. 5k 1. Air intake baffle (1) left side 1. Remove the top panel from the unit. 2. Remove the panel side l, and drill 3 holes of ø1/4 inch (6.5 mm) at the prescribed positions. 3. Install the windbaffle on the unit using field supply bolts and nut...

  • Page 100

    12 hole-in-anchor concrete insert suspension bolt (m10 or 3/8") hole-in-plug (locally purchased) fig. 6-1 23-5/8"(600mm) 21-1/32"(534mm) ceiling opening dimensions suspension bolt pitch 23-5/8"(600 mm ) 21-1/32"(534 mm ) ceiling opening dimensions suspension bolt pitch drain tube connection port 22-...

  • Page 101

    13 in cases where it is necessary to raise the height of the drain piping, the drain piping can be raised to a maximum height of 2.78 ft. (850 mm) above the bottom surface of the ceiling. Under no conditions attempt to raise it higher than 2.78 ft. (850 mm) above the bottom surface of the ceiling. D...

  • Page 102

    14 a must be within the range of 1/2"(13mm) to 23/32"(18mm). (fig. 6-11) if not within this range, malfunction or other trouble may occur. Ceiling opening dimension ceiling side a indoor unit 3-5. Checking the drainage after wiring and drain piping are completed, use the following pro- cedure to che...

  • Page 103

    15 (2) removing the corner cover and indicator cover a) while lightly pressing the cen- ter of the corner cover, pull up the tab for the screw hole. Use the same procedure to remove the indicator cover. (fig. 6-16) 3-6-2. Installing the ceiling panel (1) hang the temporary latches on the inside of t...

  • Page 104

    16 fig. 6-23 fig. 6-24 fig. 6-25 fit into the holes in the ceiling panel. Place the corner cover so that the 3 tabs then fasten it in place with the supplied screws. Pin hole for ceiling panel hook the grille from dropping hook that prevents can be installed rotated 90 * the grille can be installed ...

  • Page 105

    3-7. Wiring instructions general precautions on wiring (1) before wiring, confirm the rated voltage of the unit as shown on its nameplate, then carry out the wiring closely following the wiring diagram. (2) provide a power outlet to be used exclusively for each unit, with a power supply disconnect a...

  • Page 106

    18 cross-sectional (a)+(b) (a) power supply wiring length (ft) (c) control fuse or circuit area (awg) (b) power line length (ft) line length (ft) model (#14) (#12) (#14) breaker capacity cu-ks12nk1a 131 (max.) 230 (max.) 65 (max.) 20a cu-ks18nku, cu-ks18nkua 131 (max.) 230 (max.) 100 (max.) 15a # .....

  • Page 107

    19 when connecting each power wire to the corresponding terminal, fol- low the instructions “how to connect wiring to the terminal” and fasten the wire securely tight with the fixing screw of the terminal plate. How to connect wiring to the terminal a) for indoor unit (1) cut the wire end with a cut...

  • Page 108

    20 for stranded wiring (1) cut the wire end with a cutting pliers, then strip the insulation to expose the stranded wiring about 3/8" (10 mm) and tightly twist the wire ends. (figs. 11 and 12) (2) using a screwdriver, remove the terminal screw(s) on the terminal plate. (3) using a ring connector fas...

  • Page 109

    21 5. Refrigerant tubing 5-1. Use of the flaring method many of the conventional split system air conditioners employ the flaring method to connect refrigerant tubes which run between indoor and outdoor units. In this method, the copper tubes are flared at each end and connected with flare nuts. 5-2...

  • Page 110

    22 5-4. Connecting tubing between indoor and outdoor units a) tightly connect the indoor side refrigerant tubing exten- ded from the wall with the outdoor side tubing. (fig. 21) b) to fasten the flare nuts, apply specified torque as: table 5 5-5. Insulation of refrigerant tubing to prevent heat loss...

  • Page 111

    23 insulated tubes drain hose clamp hi lo indoor unit outdoor unit manifold valve (exclusively for r410a) pressure gauge vacuum pump charging hose (exclusively for r410a) vacuum pump adapter (exclusively for r410a) (with reverse flow prevention) (1) at this time, the 2 refrigerant tubes (and electri...

  • Page 112

    24 (4) with the “lo” knob of the manifold valve open, run the vacuum pump. The operation time for the vacu- um pump varies with tubing length and the capacity of the pump. The following table shows the amount of time for evacuation: table 6 required time for evacuation when 26.4 gal/h (100 liter/h) ...

  • Page 113

    25 how to test run the air conditioner after turning on the power of the air conditioner, use the remote controller and follow the steps below to conduct the test run. (1) set the remote controller in test run mode. (fig. 29) a)press and hold the high power button and the 1hr. Timer button. B)then p...

  • Page 114

    26 pump down pump down means collecting all refrigerant gas in the system back into the outdoor unit without losing any of the gas. Pump down is used when the unit is to be moved or before servicing the refrigerant circuit. Pump down procedure be sure to carry out pump down with the unit in cooling ...

  • Page 115

    27 7. Remote controller installation position the remote controller can be operated from either a non-fixed position or a wall-mounted position. To ensure that the air conditioner operates correctly, do not install the remote controller in the following places: in direct sunlight behind a curtain or...

  • Page 116

    28 acl (reset) button 1hr. Timer button on/off operation button high power button 8. Address switch 8-1. Address setting of the remote controller the address can be set in order to prevent interfer- ence between remote controllers when 2 indoor units are installed near each other. The address is nor...

  • Page 118: Operating Instructions

    Operating instructions cz-rd515u (852-6-4181-230-00-1) appendix c a-3.

  • Page 119: Wired Remote Controller

    Wired remote controller model no. Cz-rd515u operating instructions panasonic corporation 1006 kadoma, kadoma city, osaka, japan 85264181230001 cv6233187877 this wired remote controller is designed for both the “cool/dry/heat model” and “cool/dry model” indoor unit. Once the wired remote controller i...

  • Page 120

    2 features • microprocessor controlled operation the interior compartment of the remote controller contains several features to facilitate automatic operation, easy logically displayed for easy use. • 24-hour on or off timer this timer can be set to automatically turn the unit on or off at any time ...

  • Page 121

    3 installation location we recommend that this wired remote controller be installed properly by qualified installation technicians in accordance with the installation instructions provided with the unit. Avoid: to protect the air conditioner from heavy corrosion, avoid installing the outdoor unit wh...

  • Page 122

    4 remote controller display information on the operating conditions is displayed while the remote controller is switched on. If the unit is turned off, only the mode that was set previously is still displayed. Fan speed selector button : the air conditioner automatically decides the fan speeds. : hi...

  • Page 123

    5 sensor a temperature sensor inside the remote controller senses the room temperature. On/off operation button this button is for turning the air conditioner on and off. 1 hr. Timer button (1-hour off timer) : when you press this button, regardless of whether the unit is operating or stopping, the ...

  • Page 124

    6 remote controller (display) (1) operation mode auto ..................................... (only for cool/dry/heat model) heat ...................................... (only for cool/dry/heat model) mild dry .............................. Cool ..................................... Fan ..................

  • Page 125

    7 operation with the remote controller 1. Automatic operation (only for cool/dry/heat model) • single use this unit automatically switches between cooling operation and heating operation according to the difference between the room temperature and the temperature setting. • multiple use the air cond...

  • Page 126

    8 3. Adjusting the fan speed a. Automatic fan speed simply set the fan speed selector button to the position. This automatically sets the best fan speed for the room temperature. B. Manual fan speed if you want to adjust fan speed manually during operation, just set the fan speed selector button as ...

  • Page 127

    9 setting the timer 1. How to set the present time (example) to set to 9:10 pm. 2. How to set the off time (example) to stop the air conditioner at 11:30 pm. To cancel the setting, press the timer select button twice. 3. How to set the on time (example) to start operation at 7:10 am. To cancel the s...

  • Page 128

    10 using the 1-hour off timer 1. 1-hour off timer this function causes the unit to operate for one hour and then stop, regardless of whether the unit is on or off when this button is pressed. The indicator in the display indicates that this function is operating. Setting procedure: regardless of whe...

  • Page 130: Installation Instructions

    A-4 installation instructions cz-rd515u (852-6-4190-592-00-0) appendix d.

  • Page 131: Wired Remote Controller

    Parts supplied with the remote controller see table 1. Remote controller installation guidelines ‡ mount the remote controller 3.3 to 4.9 ft. (1 to 1.5 meters) off the floor where it can sense the average temperature of the room. ‡ do not mount the remote controller in a place exposed to direct sunl...

  • Page 132

    2 a. Installing with in-wall junction box (1) install the junction box (locally purchased) into the wall. (figs. 2-a and 3) (2) pass the wire harness through the junction box and conduit. (fig. 3) (3) insert a flathead screwdriver into the 5 tab locations and disconnect the back plate of the remote ...

  • Page 133

    Fig. 8 indicator wire harness ceiling panel terminal cover clamps 7p ind and 4p rc wiring connector 5p flap wiring connector clamping strap flap rc ind 7p 4p 5p flap wiring connector wire harness remote controller wire harness control pcb indicator 7p ind and 4p rc wiring connector putty 3 how to wi...

  • Page 134

    4 fig. 9 fig. 10 fig. 11 on/off operation button 1 hr.Timer button night setback button acl (reset) button sensor button operation lamp timer lamp high power lamp remote control receiver operation button how to test run the air conditioner after turning on the power of the air conditioner, use the r...

  • Page 136

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