Panasonic CS-Z35UFRAW Service Manual
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Panasonic CS-Z35UFRAW Service Manual

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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 products dealt with in this service information by anyone else could result in serious injury or death.
There are special components used in this equipment which are important for safety. These parts are marked by
Diagrams, Circuit Board Diagrams, Exploded Views and Replacement Parts List. It is essential that these critical parts should be replaced
with manufacturer's specified parts to prevent shock, fire or other hazards. Do not modify the original design without permission of
manufacturer.
In order to avoid frostbite, be assured of no refrigerant leakage during the installation or repairing of refrigerant circuit.
R32 REFRIGERANT
– This Air Conditioner contains and operates with refrigerant R32.
THIS PRODUCT MUST ONLY BE INSTALLED OR SERVICED BY QUALIFIED PERSONNEL.
Refer to Commonwealth, State, Territory and local legislation, regulations, codes, installation & operation manuals, before the
installation, maintenance and/or service of this product.
CS-Z25UFRAW
CS-Z35UFRAW
CS-Z50UFRAW
WARNING
IMPORTANT SAFETY NOTICE
PRECAUTION OF LOW TEMPERATURE
CAUTION
Order No: PAPAMY1805093CE
Indoor Unit
© Panasonic Corporation 2018.
Outdoor Unit
CU-Z25UBRA
CU-Z35UBRA
CU-Z50UBRA
Destination
Australia
New Zealand
in the Schematic

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Summary of Contents for Panasonic CS-Z35UFRAW

  • Page 1 – This Air Conditioner contains and operates with refrigerant R32. THIS PRODUCT MUST ONLY BE INSTALLED OR SERVICED BY QUALIFIED PERSONNEL. Refer to Commonwealth, State, Territory and local legislation, regulations, codes, installation & operation manuals, before the installation, maintenance and/or service of this product. © Panasonic Corporation 2018.

  • Page 2: Table Of Contents

    7. Refrigeration Cycle Diagram ......25 15.7 Auto Restart Control ........81 CS-Z25UFRAW CU-Z25UBRA 15.8 Indication Panel ..........81 CS-Z35UFRAW CU-Z35UBRA ....25 16. Protection Control ..........82 CS-Z50UFRAW CU-Z50UBRA ....26 16.1 Protection Control for All Operations ..82 8. Block Diagram ..........27 16.2 Protection Control for Cooling &...

  • 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  For R32 model, use piping, flare nut and tools which is specified for R32 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 injury. ...
  • Page 5 CAUTION 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 furniture. Select an installation location which is easy for maintenance. Incorrect installation, service or repair of this air conditioner may increase the risk of rupture and this may result in loss damage or injury and/or property.

  • Page 6: Precaution For Using R32 Refrigerant

    2. Precaution for Using R32 Refrigerant  The basic installation work procedures are the same as conventional refrigerant (R410A, R22) models. However, pay careful attention to the following points: WARNING Since the working pressure is higher than that of refrigerant R22 models, some of the piping and installation and service tools are special.
  • Page 7 CAUTION 2-5. No ignition sources  No person carrying out work in relation to a refrigeration system which involves exposing any pipe work that contains or has contained flammable refrigerant shall use any sources of ignition in such a manner that it may lead to the risk of fire or explosion. He/She must not be smoking when carrying out such work.
  • Page 8 CAUTION Leak detection methods  Electronic leak detectors shall be used to detect flammable refrigerants, but the sensitivity may not be adequate, or may need re- calibration. (Detection equipment shall be calibrated in a refrigerant-free area.)  Ensure that the detector is not a potential source of ignition and is suitable for the refrigerant used. ...
  • Page 9 CAUTION Labelling  Equipment shall be labelled stating that it has been de-commissioned and emptied of refrigerant.  The label shall be dated and signed.  Ensure that there are labels on the equipment stating the equipment contains flammable refrigerant. Recovery ...

  • Page 10: Specifications

    3. Specifications Model CS-Z25UFRAW Indoor POS (EAN) 5025232885435 Model CU-Z25UBRA Outdoor POS (EAN) 5025232885466 Performance Test Condition Phase, Hz Single, 50 Power Supply Min. Mid. Max. Min. Mid. Max. 0.85 2.50 3.40 0.85 2.50 3.40 Capacity BTU/h 2900 8530 11600 2900 8530 11600...
  • Page 11 Model CS-Z25UFRAW Indoor POS (EAN) 5025232885435 Model CU-Z25UBRA Outdoor POS (EAN) 5025232885466 Type Cross Flow Fan Material ASG33 Motor Type DC / Transistor (8-poles) Input Power Output Power Cool Heat Cool Heat Cool Speed Heat Cool 1040 Heat 1140 Cool 1090 Heat 1190...
  • Page 12 Model CS-Z25UFRAW Indoor POS (EAN) 5025232885435 Model CU-Z25UBRA Outdoor POS (EAN) 5025232885466 Stacking No. (CS / CU / CZ) Actual Stacking Quantity (12 / 6 / -) Pipe Diameter (Liquid / Gas) mm (inch) 6.35 (1/4) / 9.52 (3/8) Standard length m (ft) 5.0 (16.4) Length range (min –...
  • Page 13 Model CS-Z35UFRAW Indoor POS (EAN) 5025232885442 Model CU-Z35UBRA Outdoor POS (EAN) 5025232885473 Performance Test Condition Phase, Hz Single, 50 Power Supply Min. Mid. Max. Min. Mid. Max. 0.85 3.50 3.80 0.85 3.50 3.80 Capacity BTU/h 2900 11900 13000 2900 11900...
  • Page 14 Model CS-Z35UFRAW Indoor POS (EAN) 5025232885442 Model CU-Z35UBRA Outdoor POS (EAN) 5025232885473 Type Cross Flow Fan Material ASG33 Motor Type DC / Transistor (8-poles) Input Power Output Power Cool Heat Cool Heat Cool Speed Heat Cool 1080 Heat 1190 Cool...
  • Page 15 Model CS-Z35UFRAW Indoor POS (EAN) 5025232885442 Model CU-Z35UBRA Outdoor POS (EAN) 5025232885473 Stacking No. (CS / CU / CZ) Actual Stacking Quantity (12 / 6 / -) Pipe Diameter (Liquid / Gas) mm (inch) 6.35 (1/4) / 9.52 (3/8) Standard length m (ft) 5.0 (16.4)
  • Page 16 Model CS-Z50UFRAW Indoor POS (EAN) 5025232885459 Model CU-Z50UBRA Outdoor POS (EAN) 5025232885480 Performance Test Condition Phase, Hz Single, 50 Power Supply Min. Mid. Max. Min. Mid. Max. 0.90 5.00 5.70 0.90 5.00 5.70 Capacity BTU/h 3070 17100 19400 3070 17100 19400 kcal/h 4300...
  • Page 17 Model CS-Z50UFRAW Indoor POS (EAN) 5025232885459 Model CU-Z50UBRA Outdoor POS (EAN) 5025232885480 Type Cross Flow Fan Material ASG33 Motor Type DC / Transistor (8-poles) Input Power Output Power Cool Heat Cool Heat Cool 1010 Speed Heat 1130 Cool 1260 Heat 1440 Cool 1310...
  • Page 18 Model CS-Z50UFRAW Indoor POS (EAN) 5025232885459 Model CU-Z50UBRA Outdoor POS (EAN) 5025232885480 Stacking No. (CS / CU / CZ) Actual Stacking Quantity (12 / 4 / -) Pipe Diameter (Liquid / Gas) mm (inch) 6.35 (1/4) / 12.70 (1/2) Standard length m (ft) 5.0 (16.4) Length range (min –...

  • Page 19: Features

    4. Features  Inverter Technology Wider output power range Energy saving Quick Cooling Quick Heating More precise temperature control  Environment Protection Non-ozone depletion substances refrigerant (R32)  Long Installation Piping Long piping up to 20 meters (Z25,35UFRAW) and 30 meters (Z50UFRAW) during single split connection only ...

  • Page 20: Location Of Controls And Components

    5. Location of Controls and Components Indoor Unit INDICATOR Airflow Direction Louver Air Outlet Aluminium Fin Auto OFF/ON button • Use when remote control is misplaced or a malfunction occurs. Receiver Remote Control Front Panel Air filters Air Inlet String Outdoor Unit Remote Control LCD display...

  • Page 21: Dimensions

    6. Dimensions Indoor Unit <Top View> <Side View> <Front View> <Side View> 49.7 <Back View> <Remote Control> <Remote Control Holder> Drain hose <Bottom View> 65.4 80.5 80.4 Unit : mm...

  • Page 22: Outdoor Unit

    Outdoor Unit 6.2.1 CU-Z25UBRA <Top View> Space necessary for installation 67.6 (104.7) 104.9 60.5 100 mm 100 mm 1000 mm Anchor Bolt Pitch × 2-way valve at Liquid side (High Pressure) 3-way valve at Gas side (Low Pressure) <Side View> <Side View>...
  • Page 23 6.2.2 CU-Z35UBRA <Top View> Space necessary for 68.7 installation (124 ) (62.6) 100 mm 100 mm 1000 mm Anchor Bolt Pitch 330 × 540 <Side View> <Side View> <Front View> 3-way valve at Gas side Unit : mm (Low Pressure) 2-way valve at Liquid side (High Pressure) <Chassis>...
  • Page 24 6.2.3 CU-Z50UBRA <Top View> Space necessary for installation (131) 34.7 100 mm 100 mm 1000 mm Anchor Bolt Pitch 360.5 × 613 2-way valve at Liquid side (High Pressure) 3-way valve at Gas side (Low Pressure) <Front View> <Side View> <Side View>...

  • Page 25: Refrigeration Cycle Diagram

    7. Refrigeration Cycle Diagram CS-Z25UFRAW CU-Z25UBRA CS-Z35UFRAW CU-Z35UBRA INDOOR OUTDOOR LIQUID EXPANSION TEMP. SIDE VALVE STRAINER STRAINER SENSOR 2-WAY VALVE PIPE TEMP. INTAKE SENSOR 2 TEMP. SENSOR CONDENSER PIPE TEMP. PIPE SENSOR 1 TEMP. SENSOR HEAT EXCHANGER (EVAPORATOR) SIDE RECEIVER...

  • Page 26: Cs-Z50Ufraw Cu-Z50Ubra

    CS-Z50UFRAW CU-Z50UBRA INDOOR OUTDOOR LIQUID EXPANSION SIDE STRAINER VALVE 2-WAY PROCESS VALVE TUBE TEMP. PIPE SENSOR TEMP. CONDENSER INTAKE SENSOR 2 TEMP. SENSOR PIPE TEMP. PIPE SENSOR 1 TEMP. SENSOR HEAT EXCHANGER (EVAPORATOR) SIDE 4-WAYS VALVE 3-WAY RECEIVER VALVE TANK SENSOR COMPRESSOR COOLING...

  • Page 27: Block Diagram

    8. Block Diagram...

  • Page 28: Wiring Connection Diagram

    9. Wiring Connection Diagram Indoor Unit REMARKS : BLUE : PINK CN-CNT BR : BROWN TERMINAL CN–RMT (WHT) FUSE301 : ORANGE BOARD (WHT) T3.15A L250V BL : BLACK AC306 (BLK) NOISE G/GRN : GREEN FILTER Y/YLW : YELLOW AC303 (WHT) HAJEM-A W/WHT : WHITE CIRCUIT...

  • Page 29: Outdoor Unit

    Outdoor Unit 9.2.1 CU-Z25UBRA YELLOW (YEL) OR T(W) REMARKS BLU : BLUE BLK : BLACK SINGLE PHASE POWER SUPPLY TO INDOOR UNIT WHT : WHITE RED : RED BLUE YLW : YELLOW (RED) (BLU) GRY : GRAY OR R(U) OR S(V) GRN : GREEN TERMINAL TRADEMARK...
  • Page 30 9.2.2 CU-Z35UBRA YELLOW (YEL) OR T(W) REMARKS BLU : BLUE BLK : BLACK SINGLE PHASE POWER SUPPLY TO INDOOR UNIT WHT : WHITE RED : RED BLUE YLW : YELLOW (RED) (BLU) GRY : GRAY OR R(U) OR S(V) GRN : GREEN TERMINAL TRADEMARK PNK : PINK...
  • Page 31 9.2.3 CU-Z50UBRA YELLOW (YEL) OR T(W) REMARKS BLU : BLUE BLK : BLACK SINGLE PHASE POWER SUPPLY TO INDOOR UNIT WHT : WHITE RED : RED BLUE YLW : YELLOW (RED) (BLU) GRY : GRAY OR R(U) OR S(V) GRN : GREEN TRADEMARK TERMINAL PNK : PINK...

  • Page 32: Electronic Circuit Diagram

    10. Electronic Circuit Diagram 10.1 Indoor Unit CN-CNT CN–RMT (WHT) (WHT) *F302 5.1k *C57 *C56 1000p 1000p 0.1µ HAJEM-A (WHT) TERMINAL 0.01µ FUSE301 BOARD T3.15A L250V AC306 (BLK) NOISE FILTER AC303 (WHT) 0.01µ CIRCUIT IC02 CN–STM1 AC304 (RED) (BLU) COMMUNICATION CIRCUIT UP DOWN LOUVER MOTOR...

  • Page 33: Outdoor Unit

    10.2 Outdoor Unit 10.2.1 CU-Z25UBRA REACTOR RAT1 RAT2 (GRY) (GRY) 15.8k 220u SINGLE PHASE POWER SUPPLY TO INDOOR UNIT OUTDOOR AIR TEMP. SENSOR (THERMISTOR) t° TERMINAL CN–TH1 t° BOARD (WHT) PIPING TEMP. SENSOR (THERMISTOR) DATA t° (RED) COMPRESSOR TEMP. SENSOR (THERMISTOR) COMMUNICATION CN–TANK CIRCUIT...
  • Page 34 10.2.2 CU-Z35UBRA REACTOR RAT1 RAT2 (GRY) (GRY) 15.8k 220u SINGLE PHASE POWER SUPPLY TO INDOOR UNIT OUTDOOR AIR TEMP. SENSOR (THERMISTOR) t° TERMINAL CN–TH1 t° BOARD (WHT) PIPING TEMP. SENSOR (THERMISTOR) DATA t° (RED) COMPRESSOR TEMP. SENSOR (THERMISTOR) COMMUNICATION CN–TANK CIRCUIT 4.99k FUSE 2...
  • Page 35 10.2.3 CU-Z50UBRA REACTOR RAT1 RAT2 (GRY) (GRY) 15.8k 220u SINGLE PHASE POWER SUPPLY TO INDOOR UNIT OUTDOOR AIR TEMP. SENSOR (THERMISTOR) t° TERMINAL CN–TH1 t° BOARD (WHT) PIPING TEMP. SENSOR (THERMISTOR) DATA t° (RED) COMPRESSOR TEMP. SENSOR (THERMISTOR) COMMUNICATION CN–TANK CIRCUIT 4.99k (WHT)

  • Page 36: Printed Circuit Board

    11. Printed Circuit Board 11.1 Indoor Unit 11.1.1 Main Printed Circuit Board AC306 G301 CN-FM AC304 AC303 (Random Auto Restart enable/disable) CN-NANO CN-RMT CN-DISP CN-STM1 CN-CNT CN-STM2 CN-RCV HAJEM-A CN-TH...
  • Page 37 11.1.2 Display Printed Circuit Board CN-DISP 11.1.3 Receiver Printed Circuit Board CN-RCV LED201...

  • Page 38: Outdoor Unit

    11.2 Outdoor Unit 11.2.1 Main Printed Circuit Board POWER TRANSISTOR (IPM) CN-MTR2 CN-S CN-MTR1 CN-TH1 CN-DEMAND CN-TANK CN-HOT CN-STM AC-WHT DATA CURRENT TRANSFORMER (CT) AC-BLK CN-V1...
  • Page 39 11.2.2 Demand Control Printed Circuit Board CN-DEMAND CN-OPT CN-PWR AC_GND...

  • Page 40: Installation Instruction

    12. Installation Instruction 12.1 Indoor Unit Required Materials  Read catalog and other technical materials and prepare the required materials.  Pipe Size Reducer (CZ-MA1P) for CS-Z50*** when connect to multi. Other Items to be Prepared (Locally Purchased) Product name Remarks VP20 (outer diameter ø26mm), VP30 (outer diameter ø38mm), Reducer (VP30-VP20) ;...
  • Page 41 12.1.1.2 Remote Controller  Signals may not be transmitted and received Attaching the remote control holder to the wall correctly when the remote controller is operated while in the holder. Take the remote controller in Remote control holder fixing screws 7 your hand to operate the unit.
  • Page 42 12.1.3.1.2 To drill a hole in the wall and install a sleeve of piping Insert the piping sleeve to the hole. Indoor Outdoor Fix the bushing to the sleeve. Cut the sleeve until it extrudes about 15 mm 15 mm from the wall.
  • Page 43 12.1.3.1.5 Indoor unit installation  For floor installations, secure the indoor unit using 6 screws.  For wall installations, secure the mounting plate using 7 screws and the indoor unit using 4 screws. Temporarily secure the mounting plate to the wall, make sure that the panel is completely level, and mark the drilling points on the wall.
  • Page 44 12.1.3.2.3 Refrigerant piping See Refrigerant piping under Exposed Installation. Wall (Unit: mm) Left bottom piping Right bottom piping Unit piping position Hole location Right/left side piping Wall 12.1.3.3 Concealed installation  Only item peculiar to this installation method are given here. See Exposed installation for additional instructions. 12.1.3.3.1 Preparation ...
  • Page 45 12.1.4 Connecting the Refrigerant Piping 12.1.4.1 Connecting The Piping to Indoor For connection joint of all models Seal sufficiently the flare nut (both gas and liquid sides) Please make flare after inserting flare nut (locate at with neutral cure (Alkoxy type) & ammonia-free joint portion of tube assembly) onto the copper pipe.
  • Page 46 12.1.4.4 Insulating the refrigerant piping  Attach the pipe after checking for gas leakage, Auxiliary pipe Auxiliary pipe Auxiliary pipe described above. Slit Slit Cut the insulated portion of the on-site piping, matching it up with the connecting portion. Insulation sheet Secure the slit on the auxiliary pipe side with the butt joint on the connection pipe using the Tape...
  • Page 47 Indoor/outdoor Conductor not Conductor Conductor WIRE STRIPPING, Wire stripping connection fully inserted fully inserted over inserted CONNECTING terminal board REQUIREMENT 5 mm or more No loose strand PROHIBITED PROHIBITED ACCEPT (gap between wires) when inserted RISK OF FIRE JOINING OF WIRES MAY CAUSE WARNING OVERHEATING AND...

  • Page 48: Outdoor Unit

    12.2 Outdoor Unit 12.2.1 Select the Best Location  12.2.1.1 Outdoor Installation Diagram If an awning is built over the unit to prevent direct sunlight or rain, be careful that heat radiation from the condenser is not obstructed.  There should not be any animal or plant which Power supply could be affected by hot air discharged.
  • Page 49 12.2.3 Connect the Piping 12.2.3.1 Connecting the Piping to Indoor For connection joint location at outside building For connection joint location at inside building  Please make flare after inserting flare nut (locate at Refer to indoor installation instruction. joint portion of tube assembly) onto the copper pipe. (In case of using long piping) Connect the piping ...
  • Page 50 Mount valve caps onto the 2-way valve and the 3-way valve. Be sure to check for gas leakage.  If gauge needle does not move from 0 cmHg (0 MPa) to -76 cmHg (-0.1 MPa), in step 3 above take the following measure: If the leak stops when the piping connections are tightened further, continue working from step 3.
  • Page 51 12.2.6 Pipe Insulation Please carry out insulation at pipe connection portion as mentioned in Indoor/Outdoor Unit Installation Diagram. Please wrap the insulated piping end to prevent water from going inside the piping. If drain hose or connecting piping is in the room (where dew may form), please increase the insulation by using POLY-E FOAM with thickness 6 mm or above.

  • Page 52: Installation And Servicing Air Conditioner Using R32

    13. Installation and Servicing Air Conditioner using R32 13.1 About R32 Refrigerant For air conditioning refrigerants such as R410A, the refrigerants were collected back in order to prevent their air dissipation, to curbe the global warming impact, in case they were released into the atmosphere. In the “4th Environmental Basic Plan”, 80% reduction of greenhouse gas emissions by 2050 is required, and due to this requirement, further reduction in the emission of high greenhouse effect gas, such as CFCs, is required.
  • Page 53 2. Characteristic of Pressure As shown in Table 2, R32 does not have much difference in vapor pressure at the same refrigerant temperature comparing to R410A, but comparing to R22, it is higher at 1.6 times more. Thus, the same as in case of R410A, it is necessary to do installation and service using high-pressure tools and components.

  • Page 54: Refrigerant Piping Installation • Tools Used In Services

    13.3 Refrigerant piping installation • Tools used in services 13.3.1 Required Tools R32 refrigerant air conditioners use the common parts as R410A air conditioners for two-way valves and three-way valves (diameters of service ports); thus, they maintain commonality in the maintenance of the compressive strength, the size of pipe flaring, and the size of flare nuts as R410A.
  • Page 55 3. Torque wrenches (diameters 1/2, 5/8) Manifold gauges / Charging hoses In order to strengthen the compressive strength, the diameters of wrenches change depending on the flare nut sizes. Torque wrenches Differences in charging hoses Differences in torque wrenches (common R410A) Normal 5.1 MPa 3.4 MPa...
  • Page 56 7. HFC refrigerant_Electric gas leakage tester 9. Refrigerant cylinders R32 refrigerant is often used for other mixed Refrigerant cylinders for R410A are painted in pink, refrigerant (R410A, R404A, R407C etc.). Therefore, and the ones for R32 are painted in other colors that the usage of existing HFC detectors is possible, but in might subject to change according to the international order to detect more accurately, we recommend to...
  • Page 57 11. Tools used for refrigerant piping installations and services Tools for R410A Common with R32 Possibility of usage for R22 ○ ○ Pipe cutters, reamers or scrapers ○ ○ Flare tools (clutch type) ○ ○ Torque wrench (1/4, 3/8) ○ ×...

  • Page 58: New Installation, Relocation, Repairing Of Refrigerant Cycle System The Procedures

    13.4 New installation, Relocation, Repairing of Refrigerant Cycle System The Procedures Relocation Repairing refrigerant cycle Installation Indoor / outdoor units and piping Pump down Refrigerant recovery • Displacing pipes and wires, and displacing indoor / outdoor units Prevention of impurity •...

  • Page 59: Piping Installation Of R32

    13.5 Piping installation of R32 13.5.1 Pipe materials used and flaring Copper pipes are used for refrigerant piping. Pipes Pipe thickness which comply with JIS Regulations need to be used. Room air conditioners which use R410A and R32 O and OL materials Thickness (mm) have higher pressure;...

  • Page 60: Installation, Relocation, And Service

    13.6 Installation, Relocation, and Service 13.6.1 Air purge and gas leak test for new installation (using new refrigerant pipes) using vacuum pump (From the point of view of global environment protection, do not release CFCs into the atmosphere during installation work) 1.
  • Page 61 13.6.2 Process of refrigerant recovery 1. Connect the center charging hose of manifold gauge to the in-let side of recovery device. 2. Connect the valves of the discharge side of recovery device and liquid side of refrigerant cylinder with red hose (charging hose).
  • Page 62 13.6.3 Relocation 1. Removing the air conditioning unit a) Recovery of outdoor unit refrigerant by pumping down Press “forced cooling button” (as a general rule, since 1998 the name of cooling testing button is changed, and this name is unified within the air conditioning industry), and then you are able to start cooling operation in which the room temperature is low, and you can recover the refrigerant from the outdoor unit.
  • Page 63 13.6.6 Re-insertion of refrigerant in service When re-insertion is needed, follow the procedures to ensure the insertion of new refrigerant at correct amount. 1. Attach charging hose (blue) to the service port of the outdoor unit. 2. Attach charging hose (red) to the vacuum pump. Fully open the 2-way and 3-way valves. 3.

  • Page 64: Repairing Of Refrigerant Cycle / Brazing Point

    13.7 Repairing of refrigerant cycle / Brazing point 13.7.1 Preparation for repairing of refrigerant cycle / brazing Brazing which is a technique needed for repairing refrigerant cycle requires advanced technique and experience, and this brazing procedure can only be performed by the workers who completed “Gas Welding Skill Training” regulated by the Occupational Safety and Health Act, and went through the training programs of refrigerant operations.
  • Page 65 2. Cylinder without adjustment valve side gauge pressure is adjusted by the adjuster. Check the both side valves of the torch and open the cylinder valve to check the remaining refrigerant in the cylinder. Caution: Do not attach oil component on the connection port of the adjuster. Especially, use an oxygen cylinder adjuster which is no oil substance type.
  • Page 66 13.7.5 Types of flame Types of flame change based on the proportion of propane and oxygen. [Neutral Flame] Perform brazing with this flame (This is a flame when oxygen and propane are mixed at proper proportion, and has lesser effect on the brazed metals) White core flame 10 ~ 15 mm...
  • Page 67 13.7.7 Selection of brazing material Use BAg brazing material (silver solder) to increase the welding performance. Tensile strength Composition of ingredients (%) Temperature (°C) Characteristics (Reference) Category Standard Brazing Base Number Solidus Liquidus Kgf•cm applications temp material Liquidity is good at low temperature, 49.0 14.5...
  • Page 68 13.7.10 Checking of brazing (insert) points 1. No impurity on the brazing point Gap 0.025 ~ 0.05 mm If dirt or oil is attached on the brazing point, the brazing filler metal does not reach to junction, and Inner diameter ø6.45 it may cause poor welding.
  • Page 69 (Reference) Melting temperature of copper • • • • • • • Approx. 1083°C Maximum temperature obtained in propane and oxygen • • • • • • • Approx. 1083°C The important point is to heat the bonding part uniformly within a short period of time until reaching to the brazing temperature in the following manner.

  • Page 70: Reference> Analysis Method For No Error Code, No Cooling / No Warming

    13.8 <Reference> Analysis method for no error code, no cooling / no warming 13.8.1 Preparation for appropriate diagnosis In order to obtain appropriate operation characteristics, minimum 15 minutes or more operation time [testing operation (rated operation)] is required. 1. Method of rated operation (rated operation) For the models which have two buttons of “emergency operation and forced cooling operation”, press forced cooling button once.
  • Page 71 1. Measuring temperature 1) Indoor unit suction temperature, release temperature, temperature difference, → Measure by thermometer 2) 2-way valve pipe temperature in cooling mode is low temperature (benchmark：5 ~ 10°C), in heating mode is medium temperature (benchmark：25 ~ 35°C). 3) 3-way valve pipe temperature in cooling mode is low temperature (benchmark：7 ~ 15°C) in heating mode is high temperature (benchmark：38 ~ 50°C).

  • Page 72: Operation Control

    14. Operation Control 14.1 Basic Function Inverter control, which equipped with a microcomputer in determining the most suitable operating mode as time passes, automatically adjusts output power for maximum comfort always. In order to achieve the suitable operating mode, the microcomputer maintains the set temperature by measuring the temperature of the environment and performing temperature shifting.

  • Page 73: Indoor Fan Motor Operation

    14.1.5 Automatic Operation  This mode can be set using remote control and the operation is decided by remote control setting temperature, remote control operation mode and indoor intake air temperature.  During operation mode judgment, indoor fan motor (with speed of Lo-) is running for 30 seconds to detect the indoor intake air temperature.

  • Page 74: Outdoor Fan Motor Operation

    [Heating]  According to indoor pipe temperature, automatic heating fan speed is determined as follows. RPM Increased RPM Maintain RPM Reduced Indoor Pipe Temp. B. Feedback control  Immediately after the fan motor started, feedback control is performed once every second. ...

  • Page 75: Airflow Direction

    14.4 Airflow Direction  There is one type of airflow, vertical airflow (directed by horizontal vane).  Control of airflow direction can be automatic (angles of direction is determined by operation mode, heat exchanger temperature and intake air temperature) and manual (angles of direction can be adjusted using remote control).

  • Page 76: Quiet Operation (Heating)

     Control contents Fan speed is changed from normal setting to quiet setting of respective fan speed. Fan speed for quiet operation is reduced from setting fan speed. 14.6 Quiet Operation (Heating)  Purpose To provide quiet heating operation compare to normal operation. ...

  • Page 77: Auto Restart Control

    14.8.2 OFF Timer Control OFF timer 1 and OFF timer 2 can be set using remote control, the unit with timer set will stop operate at set time. 14.9 Auto Restart Control  When the power supply is cut off during the operation of air conditioner, the compressor will re-operate within three to four minutes (there are 10 patterns between 2 minutes 58 seconds and 3 minutes 52 seconds to be selected randomly) after power supply resumes.

  • Page 78: Demand Control

    14.12 Demand Control  When the air-conditioner connected to Demand Response Enabling Devices (DRED), the power consumption especially during peak hours could be controlled. Relay 1 DRM1 Relay 2 DRM2 Relay 3 DRM3 DRED AIR-CONDITIONER  Three Demand response modes (DRM) are available DRM1 = Compressor cut off DRM2 = Operate at 50% of rated input power DRM3 = Operate at 75% of rated input power...
  • Page 79  Power failure During nanoe™ X individual operation, if power failure occurs, after power resumes, nanoe™ X individual operation resumes immediately. During combination operation, if power failure occurs, after power resumes, combination operation resume immediately.  nanoe™ X check mode To enable nanoe™...

  • Page 80: Operation Control (For Multi Split Connection)

    15. Operation Control (For Multi Split Connection) During multi split connection, indoor unit’s operation controls are same with single split connection unless specified in this chapter. 15.1 Cooling operation 15.1.1 Thermostat control  Capability supply to indoor unit is OFF (Expansion valve closed) when Intake Air Temperature — Internal setting temperature <...

  • Page 81: Automatic Operation

    15.4 Automatic Operation  This mode can be set using remote control and the operation is decided by remote control setting temperature, remote control operation mode, indoor intake and outdoor air temperature.  During operation mode judgment, indoor fan motor (with speed of -Lo) and outdoor fan motor are running for 30 seconds to detect the indoor intake and outdoor air temperature.

  • Page 82: Protection Control

    16. Protection Control 16.1 Protection Control for All Operations 16.1.1 Restart Control (Time Delay Safety Control)  The Compressor will not turn on within 3 minutes from the moment operation stops, although the unit is turned on again by pressing OFF/ON button at remote control within this period. ...
  • Page 83 16.1.4 Compressor Overheating Prevention Control  Instructed frequency for compressor operation will be regulated by compressor temperature. The changes of frequency are as below.  If compressor temperature exceeds 103°C, compressor will be stopped, occurs 4 times per 20 minutes, timer LED will be blinking.

  • Page 84: Protection Control For Cooling & Soft Dry Operation

    16.2 Protection Control for Cooling & Soft Dry Operation 16.2.1 Outdoor Air Temperature Control  The compressor operating frequency is regulated in accordance to the outdoor air temperature as shown in the diagram below.  This control will begin 1 minute after the compressor starts. ...

  • Page 85: Protection Control For Heating Operation

    16.2.5 Dew Prevention Control 1  To prevent dew formation at indoor unit discharge area.  This control will be activated if: Outdoor air temperature and Indoor pipe temperature judgment by microcontroller is fulfilled. When Cooling or Dry mode is operated more than 20 minutes or more. ...
  • Page 86 16.3.3 Overload Protection Control  The compressor operating frequency is regulated in accordance to indoor heat exchanger temperature as shown below.  If the heat exchanger temperature exceeds 60°C, compressor will stop. 16.3.4 Low Temperature Compressor Oil Return Control  In heating operation, if the outdoor temperature falls below -10°C when compressor starts, the compressor frequency will be regulated up to 600 seconds.

  • Page 87: Servicing Mode

    17. Servicing Mode 17.1 Auto OFF/ON Button Auto OFF/ON Auto OFF/ON Auto OFF/ON Auto OFF/ON Button pressed Button pressed Button pressed Button pressed 5 sec 5 sec 5 sec Auto Operation Test Run Operation Stop Normal Cooling Operation Stop Test Run Operation Stop (Forced cooling operation) (Forced heating operation)

  • Page 88: Remote Control Button

    REMOTE CONTROL RECEIVING SOUND OFF/ON MODE The Remote Control Receiving Sound OFF/ON Mode will be activated if the Auto OFF/ON button is pressed continuously for more than 16 seconds (4 “beep” sounds will occur at 16th seconds to identify the Remote Control Receiving Sound Off/On Mode is in standby condition) and press “AC Reset”...
  • Page 89 17.2.6 Special Setting mode LCD display area: Special setting display area (highlighted in color) Function Options (If any) Cannot enter this special setting mode under the following conditions: 1 Operation ON. 2 Under [Real/ON/OFF] time setting mode. To enter zone 1 area: Normal display Enter Zone1 mode...
  • Page 90 Function & Options list: Function Options Remark Name Remote control number selection A, B, C, D [iAUTO-X/iAUTO/iCOMF, Cool & Dry] mode set temperature [Low2] 16°C ~ [High2] selection [iAUTO-X/iAUTO/iCOMF, Cool & Dry] mode set temperature [High2] [Low2] ~ 30°C Zone 1 selection Heat mode set temperature Low1 selection 16°C ~ [High1]...

  • Page 91: Troubleshooting Guide

    18. Troubleshooting Guide 18.1 Refrigeration Cycle System In order to diagnose malfunctions, make sure that there are no Normal Pressure and Outlet Air Temperature (Standard) electrical problems before inspecting the refrigeration cycle. Gas Pressure Outlet air Temperature Such problems include insufficient insulation, problem with the (kg/cm (°C) power source, malfunction of a compressor and a fan.
  • Page 92 18.1.1 Relationship Between the Condition of the Air Conditioner and Pressure and Electric Current Cooling Mode Heating Mode Condition of the Electric current Electric current air conditioner Low Pressure High Pressure Low Pressure High Pressure during operation during operation Insufficient refrigerant ...

  • Page 93: Breakdown Self Diagnosis Function

    18.2 Breakdown Self Diagnosis Function 18.2.1 Self Diagnosis Function (Three Digits Alphanumeric Code)  When the latest abnormality code on the main Once abnormality has occurred during operation, unit and code transmitted from the remote the unit will stop its operation, and Timer LED controller are matched, power LED will light blinks.

  • Page 94: Error Codes Table

    18.3 Error Codes Table Diagnosis Abnormality / Abnormality Protection Problem Check location display Protection control Judgment Operation No memory of failure — Normal operation — — Indoor fan only  Indoor/outdoor wire terminal Indoor/outdoor operation can Indoor/outdoor After operation for ...
  • Page 95 Diagnosis Abnormality / Abnormality Protection Problem Check location display Protection control Judgment Operation  Check indoor/outdoor Wrong wiring and connection wire and connection Abnormal wiring or — — connecting pipe, expansion pipe piping connection valve abnormality  Expansion valve and lead wire and connector ...

  • Page 96: Self-Diagnosis Method

    18.4 Self-diagnosis Method 18.4.1 H11 (Indoor/Outdoor Abnormal Communication) Malfunction Decision Conditions  During startup and operation of cooling and heating, the data received from outdoor unit in indoor unit signal transmission is checked whether it is normal. Malfunction Caused  Faulty indoor unit PCB.
  • Page 97 18.4.2 H12 (Indoor/Outdoor Capacity Rank Mismatched) Malfunction Decision Conditions  During startup, error code appears when different types of indoor and outdoor units are interconnected. Malfunction Caused  Wrong models interconnected.  Wrong indoor unit or outdoor unit PCBs mounted. ...
  • Page 98 18.4.3 H14 (Indoor Intake Air Temperature Sensor Abnormality) Malfunction Decision Conditions  During startup and operation of cooling and heating, the temperatures detected by the indoor intake air temperature sensor are used to determine sensor errors. Malfunction Caused  Faulty connector connection. ...
  • Page 99 18.4.4 H15 (Compressor Temperature Sensor Abnormality) Malfunction Decision Conditions  During startup and operation of cooling and heating, the temperatures detected by the outdoor compressor temperature sensor are used to determine sensor errors. Malfunction Caused  Faulty connector connection.  Faulty sensor.
  • Page 100 18.4.5 H16 (Outdoor Current Transformer) Malfunction Decision Conditions  An input current, detected by Current Transformer CT, is below threshold value when the compressor is operating at certain frequency value for 3 minutes. Malfunction Caused  Lack of gas  Broken CT (current transformer) ...
  • Page 101 18.4.6 H19 (Indoor Fan Motor – DC Motor Mechanism Locked) Malfunction Decision Conditions  The rotation speed detected by the Hall IC during fan motor operation is used to determine abnormal fan motor (feedback of rotation > 2550 rpm or < 50 rpm) Malfunction Caused ...
  • Page 102 18.4.7 H23 (Indoor Pipe Temperature Sensor Abnormality) Malfunction Decision Conditions  During startup and operation of cooling and heating, the temperatures detected by the indoor heat exchanger temperature sensor are used to determine sensor errors. Malfunction Caused  Faulty connector connection. ...
  • Page 103 18.4.8 H24 (Indoor Pipe Temperature Sensor 2 Abnormality) Malfunction Decision Conditions  During startup and operation of cooling and heating, the temperatures detected by the indoor heat exchanger temperature sensor 2 are used to determine sensor errors. Malfunction Caused  Faulty connector connection.
  • Page 104 18.4.9 H27 (Outdoor Air Temperature Sensor Abnormality) Malfunction Decision Conditions  During startup and operation of cooling and heating, the temperatures detected by the outdoor air temperature sensor are used to determine sensor errors. Malfunction Caused  Faulty connector connection. ...
  • Page 105 18.4.10 H28 (Outdoor Pipe Temperature Sensor Abnormality) Malfunction Decision Conditions  During startup and operation of cooling and heating, the temperatures detected by the outdoor pipe temperature sensor are used to determine sensor errors. Malfunction Caused  Faulty connector connection. ...
  • Page 106 18.4.11 H30 (Compressor Discharge Temperature Sensor Abnormality) Malfunction Decision Conditions  During startup and operation of cooling and heating, the temperatures detected by the outdoor discharge pipe temperature sensor are used to determine sensor errors. Malfunction Caused  Faulty connector connection. ...
  • Page 107 18.4.12 H32 (Outdoor Heat Exchanger Temperature Sensor 2 Abnormality) Malfunction Decision Conditions  During startup and operation of cooling and heating, the temperatures detected by the outdoor heat exchanger temperature sensor are used to determine sensor errors. Malfunction Caused  Faulty connector connection.
  • Page 108 18.4.13 H33 (Unspecified Voltage between Indoor and Outdoor) Malfunction Decision Conditions  The supply power is detected for its requirement by the indoor/outdoor transmission. Malfunction Caused  Wrong models interconnected.  Wrong indoor unit and outdoor unit PCBs used.  Indoor unit or outdoor unit PCB defective.
  • Page 109 18.4.14 H34 (Outdoor Heat Sink Temperature Sensor Abnormality) Malfunction Decision Conditions  During startup and operation of cooling and heating, the temperatures detected by the outdoor heat sink temperature sensor are used to determine sensor errors. Malfunction Caused  Faulty connector connection. ...
  • Page 110 18.4.15 H36 (Outdoor Gas Pipe Sensor Abnormality) Malfunction Decision Conditions  During startup and operation of cooling and heating, the temperatures detected by the outdoor gas pipe temperature sensor are used to determine sensor errors. Malfunction Caused  Faulty connector connection. ...
  • Page 111 18.4.16 H37 (Outdoor Liquid Pipe Temperature Sensor Abnormality) Malfunction Decision Conditions  During startup and operation of cooling and heating, the temperatures detected by the outdoor liquid pipe temperature sensor are used to determine sensor errors. Malfunction Caused  Faulty connector connection. ...
  • Page 112 18.4.17 H97 (Outdoor Fan Motor – DC Motor Mechanism Locked) Malfunction Decision Conditions  The rotation speed detected by the Hall IC during fan motor operation is used to determine abnormal fan motor. Malfunction Caused  Operation stops due to short circuit inside the fan motor winding. ...
  • Page 113 18.4.18 H98 (Error Code Stored in Memory and no alarm is triggered / no TIMER LED flashing) Malfunction Decision Conditions  Indoor high pressure is detected when indoor heat exchanger is detecting very high temperature when the unit is operating in heating operation. ...
  • Page 114 18.4.19 H99 (Indoor Freeze Prevention Protection: Cooling or Soft Dry) Error Code will not display (no Timer LED blinking) but store in EEPROM Malfunction Decision Conditions  Freeze prevention control takes place (when indoor pipe temperature is lower than 2°C) Malfunction Caused ...
  • Page 115 18.4.20 F11 (4-way Valve Switching Failure) Malfunction Decision Conditions  When indoor heat exchanger is cold during heating (except deice) or when indoor heat exchanger is hot during cooling and compressor operating, the 4-way valve is detected as malfunction. Malfunction Caused ...
  • Page 116 18.4.21 F17 (Indoor Standby Units Freezing Abnormality) Malfunction Decision Conditions  When the different between indoor intake air temperature and indoor pipe temperature is above 10°C or indoor pipe temperature is below -1.0°C. Remark: When the indoor standby unit is freezing, the outdoor unit transfers F17 error code to the corresponding indoor unit and H39 to other indoor unit(s).
  • Page 117 18.4.22 F90 (Power Factor Correction Protection) Malfunction Decision Conditions  To maintain DC voltage level supply to power transistor.  To detect high DC voltage level after rectification. Malfunction Caused  During startup and operation of cooling and heating, when Power Factor Correction (PFC) protection circuitry at the outdoor unit main PCB senses abnormal DC voltage level for power transistors.
  • Page 118 18.4.23 F91 (Refrigeration Cycle Abnormality) Malfunction Decision Conditions  The input current is low while the compressor is running at higher than the setting frequency. Malfunction Caused  Lack of gas.  3-way valve close. Troubleshooting...
  • Page 119 18.4.24 F93 (Compressor Rotation Failure) Malfunction Decision Conditions  A compressor rotation failure is detected by checking the compressor running condition through the position detection circuit. Malfunction Caused  Compressor terminal disconnect  Faulty Outdoor PCB  Faulty compressor Troubleshooting...
  • Page 120 18.4.25 F95 (Outdoor High Pressure Protection: Cooling or Soft Dry) Malfunction Decision Conditions  During operation of cooling or soft dry, when outdoor unit heat exchanger high temperature data is detected by the outdoor unit heat exchanger thermistor. Malfunction Caused ...
  • Page 121 18.4.26 F96 (IPM Overheating) Malfunction Decision Conditions  During operating of cooling and heating, when IPM temperature data (100°C) is detected by the IPM temperature sensor. Multi Models only Compressor Overheating: During operation of cooling and heating, when the compressor OL is activated. Heat Sink Overheating: During operation of cooling and heating, when heat sink temperature data (90°C) is detected by the heat sink temperature sensor.
  • Page 122 18.4.27 F97 (Compressor Overheating) Malfunction Decision Conditions  During operation of cooling and heating, when compressor tank temperature data (112°C) is detected by the compressor tank temperature sensor. Malfunction Caused  Faulty compressor tank temperature sensor  2/3 way valve closed ...
  • Page 123 18.4.28 F98 (Input Over Current Detection) Malfunction Decision Conditions  During operation of cooling and heating, when an input over-current (X value in Total Running Current Control) is detected by checking the input current value being detected by current transformer (CT) with the compressor running.
  • Page 124 18.4.29 F99 (DC Peak Detection) Malfunction Decision Conditions During startup and operation of cooling and heating, when inverter DC peak data is received by the outdoor internal DC Peak sensing circuitry. Malfunction Caused  DC current peak due to compressor failure. ...

  • Page 125: Disassembly And Assembly Instructions

    19. Disassembly and Assembly Instructions WARNING High Voltage is 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. 19.1 Remove the Front Panel Front Panel 1.

  • Page 126: Remove The Front Grille

    19.2 Remove the Front Grille Slide the hook to left side. 1. Release the hook in the right side of the Top Vane and then take out the Top Vane. Top Vane Front Vane 2. Take out the Front Vane. Front Grille 3.

  • Page 127: Remove The Discharge Grille

    19.3 Remove the Discharge Grille. 6. Release the 2 screws to take out of the Discharge Grille. 1. Detach the Indicator complete from the Discharge Grille and release the connector CN-DISP. Discharge Grille 2. Detach the Receiver complete from the Discharge Grille and release the connector CN-RCV.
  • Page 128 2. Release the 2 screws of the earth grounding terminal. 3. Detach the 2 terminal black & red color. 4. Release the screw of the Terminal Board. 5. Release the screw at bottom of the Control Board and then slide out hold Control Board.

  • Page 129: Remove The Drain Pan

    19.5 Remove the Drain Pan Drain Pan 1. Release the 2 screws to remove the Drain Pan. 19.6 Remove the Cross Flow Fan and Fan Motor 1. Release the 3 screws from the particular piece Evaporator. Evaporator...
  • Page 130 2. Remove the screw that holding Cross Flow Fan Motor axis. Cross Flow Fan 3. Release the 4 screws of the Fan Motor. Fan Motor can be removed after the removal of the Cross Flow Fan...

  • Page 131: Outdoor Electronic Controller Removal Procedure

    19.7 Outdoor Electronic Controller Removal Procedure 19.7.1 CU-Z25UBRA Caution! When handling electronic controller, be careful of electrostatic discharge. Remove the 5 screws of the Top Panel. Remove the Control Board as follows: Screws Top Panel Release 3 Terminal Screws Connectors, L, N and Earth Wire Screw.
  • Page 132 19.7.2 CU-Z35UBRA Caution! When handling electronic controller, be careful of electrostatic discharge. Remove the 5 screws of the Top Panel. Remove the Control Board as follows: Fig. 4 Fig. 1 Remove the 8 screws of the Front Panel. Fig. 2 Fig.
  • Page 133 19.7.3 CU-Z50UBRA Caution! When handling electronic controller, be careful of electrostatic discharge. Remove the 5 screws of the Top Panel. Remove 2 screws for the plate of Terminal Board Cover. Top Panel Screw Plate of Terminal Board Cover Screws Screws Screws Fig.

  • Page 134: Technical Data

    20. Technical Data Technical data provided are based on the air conditioner running under free frequency. 20.1 Cool Mode Performance Data Unit setting: Standard piping length, Hi Fan, Cool mode at 16°C Voltage: 230V/240V 20.1.1 CS-Z25UFRAW CU-Z25UBRA Indoor (°C) Outdoor DB (°C) EWB EDB 2683 2274 241 2574 2228 303 2688 2281 294 2642 2253 296 2731 2292 285 2603 2231 331 2500 2151 376 2843 2237 243 2727 2192 305 2848 2244 295 2799 2217 298 2893 2255 287 2758 2195 333 2616 2115 378...
  • Page 135 20.1.2 CS-Z35UFRAW CU-Z35UBRA Indoor (°C) Outdoor DB (°C) EWB EDB 3757 2940 415 3604 2881 521 3763 2950 505 3699 2913 509 3823 2964 490 3644 2885 570 3500 2781 647 3980 2893 417 3818 2834 524 3987 2902 508 3919 2866 512 4050 2916 493 3861 2839 573 3662 2735 650...

  • Page 136: Heat Mode Performance Data

    Outdoor WB (°C) 3237 3102 3007 3219 3488 3400 3555 4117 3572 3565 3835 4094 3739 3796 4249 4532 20.2.2 CS-Z35UFRAW CU-Z35UBRA Indoor (°C) Outdoor WB (°C) 2554 1166 3180 1366 3711 1470 3925 1512 4140 1555 2710 1158 3370 1384 3914...
  • Page 137 20.2.3 CS-Z50UFRAW CU-Z50UBRA Indoor (°C) Outdoor WB (°C) 3371 1145 4527 1300 5007 1809 5200 2017 5393 2229 3578 1138 4799 1317 5281 1797 5474 1989 5668 2181 3888 1105 4589 1246 5141 1680 5366 1851 5595 2019 4147 1085 4619 1219 5208...

  • Page 138: Service Data

    21. Service Data Service data provided are based on the air conditioner running under rated frequency during forced cooling / forced heating mode. 21.1 Cool Mode Outdoor Air Temperature Characteristic Condition Indoor room temperature: 27°C Dry Bulb/19°C Wet Bulb Unit setting: Standard piping length, forced cooling at 16°C, Hi fan Compressor frequency: Rated for cooling operation Piping length: 5m Voltage: 230V/240V...
  • Page 139 21.1.2 CS-Z35UFRAW CU-Z35UBRA 16.0 Outdoor Air Indoor Discharge 14.0 Temperature (°C) Air Temperature (°C) 12.0 10.02 11.22 10.0 12.75 13.29 14.49 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 Outdoor Air Temperature (°C)
  • Page 140 21.1.3 CS-Z50UFRAW CU-Z50UBRA 14.0 Outdoor Air Indoor Discharge Temperature (°C) Air Temperature (°C) 12.0 8.80 10.0 9.88 11.24 11.75 12.83 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 Outdoor Air Temperature (°C) 8.00 Outdoor Air...

  • Page 141: Heat Mode Outdoor Air Temperature Characteristic

    21.2 Heat Mode Outdoor Air Temperature Characteristic Condition Indoor room temperature: 20°C Dry Bulb/ -°C Wet Bulb Unit setting: Standard piping length, forced heating at 30°C, Hi fan Compressor frequency: Rated for Heating operation Piping length: 5m Voltage: 230V/240V 21.2.1 CS-Z25UFRAW CU-Z25UBRA 45.0 Outdoor Air...
  • Page 142 21.2.2 CS-Z35UFRAW CU-Z35UBRA 60.0 Outdoor Air Indoor Discharge Temperature (°C) Air Temperature (°C) 50.0 27.77 40.0 30.59 38.11 30.0 41.02 50.89 20.0 10.0 -15 -13 -11 -9 -7 -5 -3 -1 1 7 9 11 13 15 17 19 21 23 25 Outdoor Air Temperature (°C)
  • Page 143 21.2.3 CS-Z50UFRAW CU-Z50UBRA 60.0 Outdoor Air Indoor Discharge Temperature (°C) Air Temperature (°C) 50.0 28.64 40.0 31.55 39.31 30.0 42.31 51.80 20.0 10.0 -15 -13 -11 -9 -7 -5 -3 -1 1 7 9 11 13 15 17 19 21 23 25 Outdoor Air Temperature (°C) 9.00 Outdoor Air...

  • Page 144: Piping Length Correction Factor

    21.3 Piping Length Correction Factor The characteristic of the unit has to be corrected in accordance with the piping length. 21.3.1 CS-Z25UFRAW CU-Z25UBRA 1.10 1.0096 1.0000 0.9781 0.9628 1.00 0.90 9 10 11 12 13 14 15 16 17 18 19 20 21 Pipe Length (m) 1.10 1.0042...
  • Page 145 21.3.2 CS-Z35UFRAW CU-Z35UBRA 1.10 1.0080 1.0000 0.9850 0.9656 1.00 0.90 9 10 11 12 13 14 15 16 17 18 19 20 21 Pipe Length (m) 1.10 1.0118 1.0000 0.9800 0.9392 1.00 0.90 0.80 9 10 11 12 13 14 15 16 17 18 19 20 21...
  • Page 146 21.3.3 CS-Z50UFRAW CU-Z50UBRA 1.10 1.0134 1.0000 0.9677 0.9576 1.00 0.90 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 Pipe Length (m) 1.10 1.0075...

  • Page 147: Exploded View And Replacement Parts List

    22. Exploded View and Replacement Parts List 22.1 Indoor Unit 15 11 CWH55025J x 11 CWH55051AJ 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 148 SAFETY REF. NO. PART NAME & DESCRIPTION QTY. CS-Z25UFRAW CS-Z35UFRAW CS-Z50UFRAW REMARK CHASSIS-COMPLETE ACXD50C01620 ACXD50C01620 ACXD50C01620 FAN MOTOR BRACKET (BOTTOM) ACXD54-01370 ACXD54-01370 ACXD54-01370 FAN MOTOR BRACKET (TOP) ACXD54-01380 ACXD54-01380 ACXD54-01380 FAN MOTOR L6CBYYYL0253 L6CBYYYL0253 L6CBYYYL0253 SCREW-BRACKET FAN MOTOR XTN4+12CFJ XTN4+12CFJ...
  • Page 149 SAFETY REF. NO. PART NAME & DESCRIPTION QTY. CS-Z25UFRAW CS-Z35UFRAW CS-Z50UFRAW REMARK SHOCK ABSORBER ACXG70-09890 ACXG70-09890 ACXG70-09890 SHOCK ABSORBER ACXG70-09900 ACXG70-09900 ACXG70-09900 C.C.CASE ACXG50-46880 ACXG50-46890 ACXG50-46900 (Note)  All parts are supplied from PAPAMY, Malaysia (Vendor Code: 00029488).  “O” marked parts are recommended to be kept in stock.

  • Page 150: Outdoor Unit

    22.2 Outdoor Unit 22.2.1 CU-Z25UBRA 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 151 CWH171039A NUT-TERMINAL COVER CWH7080300J CABINET SIDE PLATE CWE041858A CABINET FRONT PLATE CO. CWE06C1563 CABINET TOP PLATE CWE031230A WIRE NET ACXD04-00040A PLATE-C.B.COVER CWH131301 CONTROL BOARD COVER CO. CWH13C1359 PANASONIC BADGE CWE373439 INVERTER BADGE CWE373441 ACCESSORY CO.(DRAIN ELBOW) CWG87C900 INSTALLATION INSTRUCTION ACXF60-31940...
  • Page 152 SAFETY REF. NO. PART NAME & DESCRIPTION QTY. CU-Z25UBRA REMARK CWG861078 BASE BOARD-COMPLETE CWG62C1223 SHOCK ABSORBER ( R ) CWG713778 SHOCK ABSORBER ( L ) CWG713779 C.C.CASE CWG581591 (NOTE)  All parts are supplied from PAPAMY, Malaysia (Vendor Code: 00029488). ...
  • Page 153 22.2.2 CU-Z35UBRA 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 154 NUT-TERMINAL COVER CWH7080300J CABINET SIDE PLATE ACXE04-09310 CABINET FRONT PLATE CO. ACXE06C02890 CABINET TOP PLATE ACXE03-02880 WIRE NET CWD041200A PLATE-C.B.COVER CWH131470 CONTROL BOARD COVER CO. CWH13C1253 PANASONIC BADGE CWE373439 INVERTER BADGE CWE373441 ACCESSORY CO.(DRAIN ELBOW) CWG87C900 INSTALLATION INSTRUCTION ACXF60-31940 ACXG86-03760...
  • Page 155 SAFETY REF. NO. PART NAME & DESCRIPTION QTY. CU-Z35UBRA REMARK BASE BOARD-COMPLETE CWG62C1144 SHOCK ABSORBER ( R ) CWG713415 SHOCK ABSORBER ( L ) CWG713416 C.C.CASE CWG566848 (NOTE)  All parts are supplied from PAPAMY, Malaysia (Vendor Code: 00029488).  “O”...
  • Page 156 22.2.3 CU-Z50UBRA 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 157 CWH171039A NUT-TERMINAL COVER CWH7080300J CABINET SIDE PLATE ACXE04-00580 CABINET FRONT PLATE CO. ACXE06K00080 CABINET TOP PLATE ACXE03-00200 WIRE NET ACXD04-00130A PLATE-C.B.COVER CWH131470 CONTROL BOARD COVER CO. ACXH13C00170 PANASONIC BADGE CWE373439 INVERTER BADGE CWE373441 ACCESSORY CO.(DRAIN ELBOW) CWG87C900 INSTALLATION INSTRUCTION ACXF60-31940...
  • Page 158 SAFETY REF. NO. PART NAME & DESCRIPTION QTY. CU-Z50UBRA REMARK CWG861461 BASE BOARD-COMPLETE ACXG62C00940 SHOCK ABSORBER ( L ) CWG713217 SHOCK ABSORBER ( R ) CWG713218 C.C.CASE ACXG50-31580 (NOTE)  All parts are supplied from PAPAMY, Malaysia (Vendor Code: 00029488). ...

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