Panasonic CS-CZ25WKE Service Manual
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Panasonic CS-CZ25WKE 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-CZ25WKE
CS-CZ35WKE
DEICE
MODE
FAN SPEED/
TEMP
AIR SWING
ON
SET
TIMER
OFF
CANCEL
AIR CONDITIONER
WARNING
IMPORTANT SAFETY NOTICE
PRECAUTION OF LOW TEMPERATURE
CAUTION
Order No: PAPAMY2008037CE
Indoor Unit
© Panasonic Corporation 2020
Outdoor Unit
CU-CZ25WKE
CU-CZ35WKE
Destination
North Europe
in the Schematic
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Summary of Contents for Panasonic CS-CZ25WKE

  • 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 2020...

  • Page 2: Table Of Contents

    TABLE OF CONTENTS PAGE PAGE Safety Precautions ..........3 14.4 Airflow Direction ..........61         14.5 Timer Control ..........63     Precaution for Using R32 Refrigerant ....5     14.6 Random Auto Restart Control ....63     14.7 Indication Panel ..........63 Specifications ...........

  • Page 3: Safety Precautions

    1. Safety Precautions  Read the following “SAFETY PRECAUTIONS” carefully before installation.  Electrical work must be installed by a licensed electrician. Be sure to use the correct rating of the power plug and main circuit for the model to be installed. ...
  • Page 4 WARNING Engage authorized dealer or specialist for installation. If installation done by the user is incorrect, it will cause water leakage, electrical shock or fire. For refrigeration system work, lnstall according to this installation instructions strictly. If installation is defective, it will cause water leakage, electrical shock or fire.

  • Page 5: Precaution For Using R32 Refrigerant

    2. Precaution for Using R32 Refrigerant  Pay careful attention to the following precaution points and the installation work procedures. WARNING When connecting flare at indoor side, make sure that the flare connection is used only once, if torqued up and released, the flare must be remade.
  • Page 6 CAUTION General  Must ensure the installation of pipe-work shall be kept to a minimum. Avoid use dented pipe and do not allow acute bending.  Must ensure that pipe-work shall be protected from physical damage.  Must comply with national gas regulations, state municipal rules and legislation. Notify relevant authorities in accordance with all applicable regulations.
  • Page 7 CAUTION 2-8. Ventilated area  Ensure that the area is in the open or that it is adequately ventilated before breaking into the system or conducting any hot work.  A degree of ventilation shall continue during the period that the work is carried out. ...
  • Page 8 CAUTION Detection of flammable refrigerants  Under no circumstances shall potential sources of ignition be used in the searching or detection of refrigerant leaks.  A halide torch (or any other detector using a naked flame) shall not be used. ...
  • Page 9 CAUTION Decommissioning  Before carrying out this procedure, it is essential that the technician is completely familiar with the equipment and all its details.  It is recommended good practice that all refrigerants are recovered safely.  Prior to the task being carried out, an oil and refrigerant sample shall be taken in case analysis is required prior to re-use of recovered refrigerant.

  • Page 10: Specifications

    3. Specifications Indoor CS-CZ25WKE CS-CZ35WKE Model Outdoor CU-CZ25WKE CU-CZ35WKE Performance Test Condition EUROVENT EUROVENT Phase, Hz Single, 50 Single, 50 Power Supply Min. Mid. Max. Min. Mid. Max. 0.85 2.50 3.00 0.85 3.50 4.00 Capacity BTU/h 2900 8530 10200 2900...
  • Page 11 Model Indoor CS-CZ25WKE CS-CZ35WKE Outdoor CU-CZ25WKE CU-CZ35WKE Max Current (A) / Max Input Power (W) 7.0 / 1.60k 8.8 / 2.00k Starting Current (A) 3.40 4.50 Type Hermetic Motor / Rotary Hermetic Motor / Rotary Compressor Motor Type Brushless (4-poles)
  • Page 12 Model Indoor CS-CZ25WKE CS-CZ35WKE Outdoor CU-CZ25WKE CU-CZ35WKE Control Device Expansion Valve Expansion Valve Refrigeration Refrigerant Oil FW50S (450) FW50S (450) Cycle Refrigerant Type g (oz) R32, 840 (29.7) R32, 840 (29.7) CO2eq (ton) F-Gas (Precharged Amount / 0.570 / 0.650 0.570 / 0.650...
  • Page 13 Model Indoor CS-CZ25WKE CS-CZ35WKE Outdoor CU-CZ25WKE CU-CZ35WKE Dry Bulb Wet Bulb Dry Bulb Wet Bulb Maximum °C (°F) 32 (89.6) 23 (73.4) 32 (89.6) 23 (73.4) Cooling Minimum °C (°F) 16 (60.8) 11 (51.8) 16 (60.8) 11 (51.8) Indoor Maximum °C (°F) 30 (86.0)

  • Page 14: Features

    4. Features  Inverter Technology Wider output power range Energy saving More precise temperature control  Environment Protection Non-ozone depletion substances refrigerant (R32)  Long Installation Piping Long piping up to 20 meters  Easy to use remote control  Quality Improvement Random auto restart after power failure for safety restart operation Gas leakage protection...

  • Page 15: Location Of Controls And Components

    5. Location of Controls and Components Indoor Unit Air Purifying Filter Air Filters Front panel Auto OFF/ON button • Use when remote control is misplaced or malfunction occurs. Aluminium Fin INDICATOR POWER Horizontal Airflow TIMER direction louver DEICE Remote Control •...

  • Page 16: Dimensions

    6. Dimensions Indoor Unit & Remote Control Air intake direction Left piping Air outlet Right piping hole direction hole 99.5 FAN SPEED/ MODE TEMP AIR SWING TIMER CANCEL ...

  • Page 17: Outdoor Unit

    Outdoor Unit Space necessary for 68.5 installation (124) (53.4) 100mm 100mm 1000mm Anchor Bolt Pitch 330 × 540 3-way valve at Gas side Unit : mm 2-way valve at Liquid side (Low Pressure) (High Pressure)

  • Page 18: Refrigeration Cycle Diagram

    7. Refrigeration Cycle Diagram INDOOR OUTDOOR PIPE LIQUID TEMP. EXPANSION SIDE SENSOR VALVE MUFFLER STRAINER 2-WAY VALVE INTAKE PIPE TEMP. TEMP. SENSOR SENSOR INTAKE HEAT EXCHANGER TEMP. (CONDENSER) SENSOR HEAT EXCHANGER (EVAPORATOR) SIDE MUFFLER 4-WAYS VALVE 3-WAY VALVE COMP. TEMP. SENSOR COMPRESSOR COOLING...

  • Page 19: Block Diagram

    8. Block Diagram...

  • Page 20: Wiring Connection Diagram

    9. Wiring Connection Diagram Indoor Unit FUSE301 CN-CNT T3.15A L250V AC306 (BLK) (WHT) TERMINAL BOARD AC303 (WHT) OUTDOOR TEMP. FUSE 102ºC AC304 (RED) NOISE CN-RMT UNIT FILTER (WHT) CIRCUIT G301 (GRN) COMMUNICATION EVAPORATOR CIRCUIT CN-STM1 UP DOWN (WHT) LOUVER MOTOR (SW01) RECTIFICATION CIRCUIT...

  • Page 21: Outdoor Unit

    Outdoor Unit YELLOW (YLW) OR (C) REMARKS SINGLE PHASE BLUE TO INDOOR UNIT POWER SUPPLY BLUE BLACK (BLU) (RED) WHITE OR (R) OR (S) TRADEMARK TERMINAL YELLOW REACTOR BOARD GRAY COMPRESSOR TERMINAL GREEN THE PARENTHESIZED YLW/GRN YELLOW/GREEN LETTER IS INDICATED ON TERMINAL COVER RAT2 RAT1...

  • Page 22: Electronic Circuit Diagram

    10. Electronic Circuit Diagram 10.1 Indoor Unit *CN-CNT White 12V_1 *F301 *JR3 *C57 *C56 1000p 1000p FUSE301 T3.15A L250V AC306 (BLK) 5.1k TERMINAL BOARD *C48 *C47 AC303 (WHT) *CN-RMT White *C49 *C45 OUTDOOR TEMP. FUSE 102ºC AC304 (RED) NOISE UNIT FILTER CIRCUIT G301...

  • Page 23: Outdoor Unit

    10.2 Outdoor Unit SINGLE PHASE POWER SUPPLY TO INDOOR UNIT TERMINAL REACTOR BOARD RAT2 RAT1 DATA (GRY) (GRY) ( RED ) NOISE FILTER COMMUNICATION AC-BLK CIRCUIT CIRCUIT (BLK) YLW/GRN FUSE 5 (20A 250V) FUSE 8 FUSE 1 T3.15A FUSE 6 (20A 250V) L250V (20A 250V)

  • Page 24: Printed Circuit Board

    11. Printed Circuit Board 11.1 Indoor Unit 11.1.1 Main Printed Circuit Board AC304 AC303 AC306 CN-FM SW01 CN-CNT CN-DISP CN-RMT CN-STM1 CN-TH JP1 (Random Auto Restart Enable/Disable)
  • Page 25 11.1.2 Indicator & Receiver Printed Circuit Board LED204 LED202 LED203 LED201 CN-DISP...

  • Page 26: Outdoor Unit

    11.2 Outdoor Unit 11.2.1 Main Printed Circuit Board POWER TRANSISTOR (IPM) RAT1 CN-MTR2 CN-MTR1 CN-STM1 CN-TH1 CN-HOT DATA CN-TANK AC-WHT AC-BLK ACN2 RAT2...

  • Page 27: Installation Instruction

    12. Installation Instruction 12.1 Select the Best Location 12.1.1 Indoor Unit 12.1.3 Indoor/Outdoor Unit Installation  Diagram Do not install the unit in excessive oil fume area such as kitchen, workshop and etc.  There should not be any heat source or steam Piping direction Attention not to bend up drain hose...

  • Page 28: Indoor Unit

    12.2 Indoor Unit 12.2.1 How to Fix Installation Plate The mounting wall shall be strong and solid enough to prevent it from vibration. Ceiling Wall More than More than Wall More screw Indoor unit than 216 mm Installation plate PIPE HOLE CENTER 115mm TO HOLE CENTER...
  • Page 29 12.2.3 Indoor Unit Installation Pull out the Indoor piping • Do not turn over the unit without shock absorber during pull out the piping. It may cause intake grille damage. • Use shock absorber during pull out the piping to protect the intake grille from damage. Piping Piping Shock absorber...
  • Page 30 Change the drain hose position Rear view for left piping installation Connection cable Piping More than 950 mm Drain hose Sleeve for piping hole Drain cap Drain hose • • How to pull the piping and drain hose out, In case of left piping how to insert the in case of the embedded piping.
  • Page 31 Tape Connection cable Terminal Board Recommended length (mm) Earth Wire longer than others AC wires for safety reason Recommended Holder length (mm) 40 40 Indoor & outdoor connection cable Outdoor Unit WARNING This equipment must be properly earthed. Note:  Ensure the colour of wires of outdoor unit and the terminal Nos.

  • Page 32: Outdoor Unit

    12.3 Outdoor Unit 12.3.1 Install the Outdoor Unit  After selecting the best location, start installation to Indoor/Outdoor Unit Installation Diagram. Fix the unit on concrete or rigid frame firmly and horizontally by bolt nut (ø10 mm). Make sure unit install in balance level to ensure that water flow out from unit drainage hole. When installing at roof, please consider strong wind and earthquake.
  • Page 33 AIR PURGING METHOD IS PROHIBITED FOR R32 SYSTEM 12.3.3 Air Tightness Test on the Refrigerating System Do not purge the air with refrigerants but use a vacuum pump to vacuum the installation. There is no extra refrigerant in the outdoor unit for air purging. ...
  • Page 34 12.3.4 Connect the Cable to the Outdoor Unit Remove the control board cover from the unit by loosening the screw. Cable connection to the power supply through Isolating Devices (Disconnecting means). Connect approved type polychloroprene sheathed power supply cord 3 x 1.5 mm type designation 60245 IEC 57 or heavier cord to the terminal board, and connect the others end of the cord to Isolating Devices (Disconnecting means).
  • Page 35 12.3.6 Cutting and Flaring the Piping Please cut using pipe cutter and then remove the burrs. Remove the burrs by using reamer. If burrs is not removed, gas leakage may be caused. Turn the piping end down to avoid the metal powder entering the pipe. Please make flare after inserting the flare nut onto the copper pipes.
  • Page 36 12.3.9 Heating only Operation 1) Use remote controller to set heating only operation. When the unit in standby mode, follow the steps below: a) Press continuously for more than 5 seconds to enter special setting mode. b) Press to choose function 61, and then press to set “01”...
  • Page 37 12.3.14 In Case of Reusing Existing Refrigerant Piping Observe the followings to decide reusing the existing refrigerant piping. Poor refrigerant piping could result in product failure.  In the circumstances listed below, do not reuse any refrigerant piping. Instead, make sure to install a new piping. Heat insulation is not provided for either liquid-side or gas-side piping or both.

  • Page 38: 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 39 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 40: 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 41 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 42 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 43 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 44: 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 45: 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 46: 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 47 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 48 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 49 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 50: Repairing Of Refrigerant Cycle / Brazing Point . 20.3

    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 51 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 52 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 53 13.7.7 Selection of brazing material Use BA g 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 material temp Liquidity is good at low temperature, 49.0 14.5...
  • Page 54 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 55 (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 56: Reference> Analysis Method For No Error

    13.8 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 57 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 ：...

  • Page 58: 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 59: 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 60: Outdoor Fan Motor Operation

    ii Auto Fan Speed [Cooling, Dry]  According to room temperature and setting temperature, indoor fan speed is determined automatically.  When set temperature is not achieved, the indoor fan will operate according to pattern below.  When set temperature achieved, the indoor fan speed will be fixed. When thermostat off, the fan stop periodically. [Fan] ...

  • Page 61: Airflow Direction

    14.4 Airflow Direction  There are two types of airflow, vertical airflow (directed by horizontal vane) and horizontal airflow (directed by vertical vanes).  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 62 Side View (Inner Vane) Closed Position Stopper 110º Reference point Step 1 Step 2 Step 3 Step 4 Step 5 Side View (Outer Vane) Closed Position Stopper 115º Reference point Step 1 Step 2 Step 3 Step 4 Step 5 Figure 2 * The horizontal vane angle tolerance is within +/- 5 degree.

  • Page 63: Timer Control

    14.5 Timer Control  There are 2 sets of ON and OFF timer available to turn the unit ON or OFF at different preset time.  If more than one timer had been set, the upcoming timer will be displayed and will activate in sequence. 14.5.1 ON Timer Control ...

  • Page 64: Quiet Operation (Cooling Mode/Cooling Area Of Dry Mode)

    14.8 Quiet Operation (Cooling Mode/Cooling Area of Dry Mode) A. Purpose To provide quiet cooling operation compare to normal operation. B. Control condition a. Quiet operation start condition When “FAN SPEED/QUIET” button at remote control is pressed continuously until QUIET will be shown on remote control display.

  • Page 65: 8/15°C Heat Operation

    14.11 +8/15°C Heat Operation  +8/15°C Heat operation provides heating at low setting temperature in unoccupied houses during winter for the purpose of protecting equipments or housing appliances which may be destroyed by the extreme cold weather.  This operation can be ON by pressing the +8/15°C heat button on the remote control. ...

  • Page 66: Protection Control

    15. Protection Control 15.1 Protection Control for All Operations 15.1.1 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 67 15.1.4 Compressor Overheating Prevention Control  Instructed frequency for compressor operation will be regulated by compressor discharge temperature. The changes of frequency are as below.  If compressor discharge temperature exceeds 103°C, compressor will be stopped, occurs 4 times per 20 minutes, timer LED will be blinking.

  • Page 68: Protection Control For Cooling & Soft Dry Operation

    15.2 Protection Control for Cooling & Soft Dry Operation 15.2.1 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 69: Protection Control For Heating Operation

    15.2.5 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 70 15.3.5 Cold Draught Prevention Control  When indoor pipe temperature is low, cold draught operation starts where indoor fan speed will be reduced. 15.3.6 Deice Operation  When outdoor pipe temperature and outdoor air temperature is low, deice operation start where indoor fan motor and outdoor fan motor stop and Power LED ON.

  • Page 71: Servicing Mode

    16. Servicing Mode 16.1 Auto OFF/ON Button AUTO OPERATION MODE The Auto operation will be activated immediately once the Auto OFF/ON button is pressed. This operation can be used to operate air conditioner with limited function if remote control is misplaced or malfunction. TEST RUN OPERATION (FOR PUMP DOWN/SERVICING PURPOSE) The Test Run operation will be activated if the Auto OFF/ON button is pressed continuously for more than 5 seconds.

  • Page 72: Heat Only Operation

    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 73: Remote Control Button

    16.3 Remote Control Button 16.3.1 SET Button  To check remote control transmission code and store the transmission code to EEPROM. Press “Set” button by using pointer. Press “Timer Set” button until a “beep” sound is heard as confirmation of transmission code change. LCD returns to original display if remote control does not operate for 30 seconds.
  • Page 74  To limit set temperature range for COOL & DRY, HEAT mode. Press “Set” button by using pointer. Press TEMP increment or decrement button to choose No. 3. Press Timer increment or decrement button to select desired temperature low limit of set temperature for COOL &...
  • Page 75 Press TEMP increment or decrement button to choose No. 5. Press Timer increment or decrement button to select desired temperature low limit of set temperature for HEAT mode. Normal display mode Press SW to enter customer zone & Press SW’s to choose function 5 i) Display latest set temp (Low1).
  • Page 76  Auto restart enable/disable selection Normal display mode Press SW to enter customer zone & press SW’s to choose function 10 Control Disable Transmit “Enable or Disable” code Control Enable ① Press SW, special setting is immediately cancelled and normal mode starts. ②...
  • Page 77  New Deice Judgement Selection Normal display mode Press SW (t ≥ 0secs) When SW pressed continuously for t ≥ 5secs to enter service zone & press SW’s to choose function 60 Switching = No Transmit “No or Yes” code Switching = Yes Note:...
  • Page 78 16.3.7 Customization mode LCD display area: Customization display area (highlighted in color) FAN SPEED/ MODE TEMP AIR SWING TIMER CANCEL Function AIR CONDITIONER Options (If any) Cannot enter this customization mode under the following conditions: ○ 1 Operation ON. ○ 2 Under [Real/ON/OFF] time setting mode.
  • Page 79 Customization list table: Note: The functions described in the table may not be applicable to the model and may subject to change without further notice. Customization Options Remark Name Remote control number selection A, B, C, D Solar radiation sensitivity level adjustment 1, 2, 3, 4, 5 [iAUTO-X/iAUTO/iCOMF, Cool &...

  • Page 80: Troubleshooting Guide

    17. Troubleshooting Guide 17.1 Refrigeration Cycle System In order to diagnose malfunctions, make sure that Normal Pressure and Outlet Air Temperature (Standard) there are no electrical problems before inspecting the Gas pressure Outlet air refrigeration cycle. MPa (kg/cm temperature (°C) Such problems include insufficient insulation, problem Cooling Mode 0.9 ~ 1.2 (9 ~ 12)

  • Page 81: Relationship Between The Condition Of The Air Conditioner And Pressure And Electric Current

    17.2 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 82: Breakdown Self Diagnosis Function

    17.3 Breakdown Self Diagnosis Function 17.3.1 Self Diagnosis Function (Three Digits Alphanumeric Code)  Every press of the button (up or down) will Once abnormality has occurred during operation, increase abnormality numbers and transmit the unit will stop its operation, and Timer LEDs abnormality code signal to the main unit.

  • Page 83: Error Codes Table

    17.4 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 84 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 85: Self-Diagnosis Method

    17.5 Self-diagnosis Method 17.5.1 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 86 17.5.2 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 87 17.5.3 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 88 17.5.4 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 89 17.5.5 H16 (Outdoor Current Transformer Open Circuit) 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. ...
  • Page 90 17.5.6 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 > 2550rpm or < 50rpm). Malfunction Caused ...
  • Page 91 17.5.7 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 92 17.5.8 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 93 17.5.9 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 94 17.5.10 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 95 17.5.11 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 96 17.5.12 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 97 17.5.13 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 98 17.5.14 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 99 17.5.15 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 100 17.5.16 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 101 17.5.17 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 102 17.5.18 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 103 17.5.19 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 104 17.5.20 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 105 17.5.21 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 106 17.5.22 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 When F91 indication happens For safety reason and to prevent component breakdown, always switch Caution...
  • Page 107 17.5.23 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 For safety reason and to prevent component When F93 indication happens.
  • Page 108 17.5.24 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 109 17.5.25 F96 (IPM Overheating) Malfunction Decision Conditions  During operating of cooling and heating, when IPM temperature data (120°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 110 17.5.26 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 111 17.5.27 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 112 17.5.28 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 113: Disassembly And Assembly Instructions

    18. Disassembly and Assembly Instructions WARNING High Voltage are generated in the electrical parts area by the capacitor. Ensure that the capacitor has discharged sufficiently before proceeding with repair work. Failure to heed this caution may result in electric shocks. 18.1 Indoor Electronic Controllers, Cross Flow Fan and Indoor Fan Motor Removal Procedures 18.1.1...
  • Page 114 6. Remove the Particular Piece from the 3 hooks. Figure 3 11. Detach all connectors as labelled from the 9. Remove the earth wire screw. Main Electronic Controller. Then pull out the Main Electronic Controller gently. AC303 10. Pull out the Main Electronic Controller halfway.
  • Page 115 18.1.3 To Remove Discharge Grille 13. Pull out and remove the Drain Hose from the Discharge Grille. 12. Remove the 2 screws of the Discharge Grille. 14. Then pull the Discharge Grille downward gently to dismantle it. Figure 6 18.1.4 To Remove Control Board 15.
  • Page 116 18.1.5 To Remove Cross Flow Fan and Indoor Fan Motor 16. Remove the screw that holding the Cross Flow Fan and Fan Motor axis. Figure 8 18. Remove the Bearing by pulling it gently. 17. Remove the screw from the Evaporator. Figure 9...
  • Page 117 Evaporator 19. Push the holdfast to the left and lift up the Evaporator. 21. Fan Motor can be removed after the removal of the Cross Flow Fan. Reminder: To reinstall the Fan Motor, adjust the Fan Motor connector to 60° towards you before fixing Control Board Cross Flow Fan 20.

  • Page 118: Outdoor Electronic Controller Removal Procedure

    18.2 Outdoor Electronic Controller Removal Procedure Caution! When handling electronic controller, be careful of electrostatic discharge. 1. Remove the 5 screws of the Top Plate. 5. Remove the Control Board as follows: Lift up the left side of Top Plate first then remove the Top Plate.

  • Page 119: Technical Data

    Technical data provided are based on the air conditioner running under free frequency. 19.1 Cool Mode Performance Data Unit setting: Standard piping length, Hi Fan, Cool mode at 16°C Voltage: 230V 19.1.1 CS-CZ25WKE/CU-CZ25WKE Indoor (°C) Outdoor DB (°C) 19.0 2699...

  • Page 120: Heat Mode Performance Data

    19.2 Heat Mode Performance Data Unit setting: Standard piping length, Hi Fan, Heat mode at 30°C Voltage: 230V 19.2.1 CS-CZ25WKE/CU-CZ25WKE Indoor (°C) Outdoor WB (°C) -25 / -26 -20 / -21 -15 / -16 -7 / -8 2 / 1...

  • Page 121: Service Data

    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 20.1.1 CS-CZ25WKE CU-CZ25WKE 17.00 16.80 16.60 16.40 16.20 16.00 15.80...
  • Page 122 20.1.2 CS-CZ35WKE CU-CZ35WKE 17.00 16.00 15.00 14.00 13.00 12.00 11.00 10.00 Outdoor Air Temperature (°C) 5.50 5.00 4.50 4.00 3.50 3.00 2.50 2.00 Outdoor Air Temperature (°C) 1.05 1.00 0.95 0.90 0.85 0.80 Outdoor Air Temperature (°C)

  • Page 123: Heat Mode Outdoor Air Temperature Characteristic

    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 20.2.1 CS-CZ25WKE CU-CZ25WKE Outdoor Air Temperature (°C) 3.70 3.20 2.70 2.20 1.70...
  • Page 124 20.2.2 CS-CZ35WKE CU-CZ35WKE Outdoor Air Temperature (°C) 5.00 4.50 4.00 3.50 3.00 2.50 2.00 1.50 Outdoor Air Temperature (°C) Outdoor Air Temperature (°C)

  • Page 125: Piping Length Correction Factor

    20.3 Piping Length Correction Factor The characteristic of the unit has to be corrected in accordance with the piping length. 20.3.1 CS-CZ25WKE CU-CZ25WKE CS-CZ35WKE CU-CZ35WKE 1.02 1.01 1.00 0.99 0.98 0.97 0.96 0.95 0.94 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 Pipe Length (m) 1.10...

  • Page 126: Exploded View And Replacement Parts List

    21. Exploded View and Replacement Parts List 21.1 Indoor Unit CWH55025J CWH55051AJ SPEED TIME SWING CANC DITIO 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 127 SAFETY REF. NO. PART NAME & DESCRIPTION QTY. CS-CZ25WKE CS-CZ35WKE REMARK CHASSIS COMPLETE ACXD50C03410 ← FAN MOTOR L6CBYYYL0346 ← CROSS - FLOW FAN COMPLETE ACXH02C01190 ← BEARING ASSY CWH64K1006 ← SCREW - CROSS - FLOW FAN CWH551146 ← EVAPORATOR ACXB30C30840...
  • Page 128 SAFETY REF. NO. PART NAME & DESCRIPTION QTY. CS-CZ25WKE CS-CZ35WKE REMARK INSTALLATION INSTRUCTION (NORSK) ACXF60-40850 ← INSTALLATION INSTRUCTION (DANSK) ACXF60-40860 ← INSTALLATION INSTRUCTION (SUOMI) ACXF60-40870 ← ACXG86-00190 ← SHOCK ABSORBER (L) ACXG70-11650 ← SHOCK ABSORBER (R) ACXG70-11660 ← C.C. CASE ACXG50-56220 ←...

  • Page 129: Outdoor Unit

    21.2 Outdoor Unit 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 130 SAFETY REF. NO. PART NAME & DESCRIPTION QTY. CU-CZ25WKE CU-CZ35WKE REMARK CHASSIS COMPLETE CWD52K1310 ← HEATER CWA341072 ← FAN MOTOR BRACKET CWD541167 ← SCREW - FAN MOTOR BRACKET ACXH55-07140 ← FAN MOTOR L6CAYYYL0127 ← SCREW - FAN MOTOR MOUNT CWH55252J ←...
  • Page 131 SAFETY REF. NO. PART NAME & DESCRIPTION QTY. CU-CZ25WKE CU-CZ35WKE REMARK V-COIL COMPLETE (EXPANSION VALVE) ACXA43C01520 ← BADGE PANASONIC CWE373439 ← BADGE NORDIC HEATPUMP CWE373985 ← ACXG86-03760 ← BASE BOARD - COMPLETE CWG62C1162 ← SHOCK ABSORBER CWG713415 ← SHOCK ABSORBER CWG713416 ←...

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