Panasonic CS-LZ25TKE Service Manual
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Panasonic CS-LZ25TKE 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.
OFF/ON
FAN SPEED
MODE
AIR SWING
TEMP
ON
SET
TIMER
OFF
CANCEL
AIR CON DITION ER
WARNING
IMPORTANT SAFETY NOTICE
PRECAUTION OF LOW TEMPERATURE
CAUTION
Order No: PAPAMY1707100CE
Indoor Unit
CS-LZ25TKE
CS-LZ35TKE
© Panasonic Corporation 2017
Outdoor Unit
CU-LZ25TKE
CU-LZ35TKE
Destination
North Europe
in the Schematic
!

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Summary of Contents for Panasonic CS-LZ25TKE

  • Page 1 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. © Panasonic Corporation 2017...

  • Page 2: Table Of Contents

    TABLE OF CONTENTS PAGE PAGE 1. Safety Precautions ..........3 14.8 Timer Control..........62 14.9 Auto Restart Control ........62 2. Precaution for Using R32 Refrigerant ....5 14.10 Indication Panel ......... 62 14.11 +8/15°C Heat Operation ......63 3. Specifications .............9 4.

  • 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 For refrigeration system work, install according to this installation instructions strictly. If installation is defective, it will cause water leakage, electrical shock or fire. Use the attached accessories parts and specified parts for installation. Otherwise, it will cause the set to fall, water leakage, fire or electrical shock.

  • Page 5: 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 6 CAUTION 2-7. Checks to the refrigeration equipment  Where electrical components are being changed, they shall be fit for the purpose and to the correct specification.  At all times the manufacturer’s maintenance and service guidelines shall be followed.  If in doubt consult the manufacturer’s technical department for assistance.
  • Page 7 CAUTION Removal and evacuation  When breaking into the refrigerant circuit to make repairs – or for any other purpose – conventional procedures shall be used. However, it is important that best practice is followed since flammability is a consideration. The following procedure shall be adhered to: •...
  • Page 8 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 9: Specifications

    3. Specifications Indoor CS-LZ25TKE CS-LZ35TKE Model Outdoor CU-LZ25TKE CU-LZ35TKE 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 10 Indoor CS-LZ25TKE CS-LZ35TKE Model Outdoor CU-LZ25TKE CU-LZ35TKE Type Hermetic Motor (Rotary) Hermetic Motor (Rotary) Compressor Motor Type Brushless (4-poles) Brushless (4-poles) Output Power Type Cross-Flow Fan Cross-Flow Fan Material ASG20K1 ASG20K1 Motor Type DC / Transistor (8-poles) DC / Transistor (8-poles) Input Power 48.0...
  • Page 11 Indoor CS-LZ25TKE CS-LZ35TKE Model Outdoor CU-LZ25TKE CU-LZ35TKE Pipe Diameter (Liquid / Gas) mm (inch) 6.35 (1/4) / 9.52 (3/8) 6.35 (1/4) / 9.52 (3/8) Standard length m (ft) 5.0 (16.4) 5.0 (16.4) Length range (min – max) m (ft) 3 (9.8) ~ 20 (65.6) 3 (9.8) ~ 20 (65.6)

  • Page 12: 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 during single split connection only ...

  • Page 13: Location Of Controls And Components

    5. Location of Controls and Components Indoor Unit Air Purifying Filter Front panel Aluminium fin ③ Auto OFF/ON button Use when remote control is misplaced or a malfunction occurs. Indicator °C POWER TIMER DEICE +8/15 HEAT Air Filters (Green) (Orange) (Blue) (Green) Outdoor Unit...

  • Page 14: Dimensions

    6. Dimensions Indoor Unit <Top View> <Side View> <Side View> <Front View> Air intake Right piping direction hole Air outlet direction Left piping hole <Bottom View> <Remote Control> OFF/ON FAN SPEED MODE AIR SWING TEMP TIMER CAN CEL AIR CON DITION ER <Rear View>...

  • Page 15: Outdoor Unit

    Outdoor Unit <Top View> Space necessary for 68.5 installation 21.9 (124) 53.4 100 mm 100 mm 1000 mm Anchor Bolt Pitch 330 x 540 2-way valve at Liquid side (High Pressure) 3-way valve at Gas side (Low Pressure) <Side View> <Side View>...

  • Page 16: Refrigeration Cycle Diagram

    7. Refrigeration Cycle Diagram INDOOR OUTDOOR LIQUID EXPANSION TEMP. SIDE VALVE MUFFLER STRAINER SENSOR 2-WAY VALVE PIPE TEMP. INTAKE SENSOR 2 TEMP. SENSOR CONDENSER PIPE TEMP. PIPE SENSOR 1 TEMP. SENSOR HEAT EXCHANGER (EVAPORATOR) SIDE 4-WAYS VALVE 3-WAY MUFFLER VALVE TANK SENSOR COMPRESSOR...

  • Page 17: Block Diagram

    8. Block Diagram...

  • Page 18: Wiring Connection Diagram

    9. Wiring Connection Diagram Indoor Unit REMARKS: B : BLUE GROUNDING TERMINAL P : PINK BR : BROWN TERMINAL O : ORANGE BOARD BL/BLK : BLACK OUTDOOR G/GRN : GREEN UNIT Y/YLW : YELLOW R : RED Y/G : YELLOW/GREEN W/WHT : WHITE TEMP.

  • Page 19: Outdoor Unit

    Outdoor Unit REMARKS: YELLOW (YEL) BLACK: (BLK) BLUE: (BLU) WHITE: (WHT) RED: (RED) BLUE (BLU) RED (RED) YELLOW: (YLW) GRAY: (GRY) GREEN: (GRN) BROWN: (BRW) (TRADEMARK) SINGLE PHASE TO INDOOR UNIT ORANGE: (ORG) POWER SUPPLY COMPRESSOR TERMINAL (BLK) (WHT) (RED) YELLOW/GREEN: (YLW/GRN) REACTOR THE PARENTHESIZED LETTERS IS...

  • Page 20: Electronic Circuit Diagram

    10. Electronic Circuit Diagram 10.1 Indoor Unit GROUNDING TERMINAL TERMINAL BOARD OUTDOOR UNIT TEMP. FUSE 102ºC (3A) GROUNDING TERMINAL EVAPORATOR G301 (GRN) (RED) (WHT) (BLK) COMMUNICATION CIRCUIT RECTIFICATION NOISE FILTER FAN MOTOR CIRCUIT CIRCUIT ELECTRONIC CONTROLLER (SUB) F350 IC502 CN-STM7 Black CN-CNT R353...

  • Page 21: Outdoor Unit

    10.2 Outdoor Unit SINGLE PHASE TO INDOOR UNIT POWER SUPPLY (BLK) (WHT) (RED) REACTOR TERMINAL (BLK) (WHT) (RED) BOARD ELECTRONIC CONTROLLER RAT2 RAT1 (GRY) (GRY) 15.8k 15.0k 220u DATA (RED) OUTDOOR AIR TEMP. COMMUNICATION SENSOR (THERMISTOR) NOISE FILTER CIRCUIT FUSE 103 AC-BLK tº...

  • Page 22: Printed Circuit Board

    11. Printed Circuit Board 11.1 Indoor Unit 11.1.1 Main Printed Circuit Board CN-FM CN-STM2 CN-SW1 CN-CNT CN-TH2 CN-SUB CN-DISP1 CN-STM1 CN-TH1 JP1 (Random Auto Restart enable/disable)
  • Page 23 11.1.2 Indicator Printed Circuit Board LED201 LED202 LED203 LED204 LED205 CN-DISP2 11.1.3 Switch Printed Circuit Board CN-SW2 11.1.4 Sub Printed Circuit Board CN-STM9 CN-SUB CN-STM7 CN-STM8...

  • Page 24: Outdoor Unit

    11.2 Outdoor Unit POWER TRANSISTOR (IPM) CURRENT TRANSFORMER CN-TANK (CT) CN-MTR1 CN-TH1 CN-STM CN-HOT AC-WHT AC-BLK CN-MTR2 DATA...

  • Page 25: 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 r i d o i t o i t...

  • Page 26: 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 the vibration. Ceiling Wall Wall More than 1 More than Indoor unit More than 2 screw 215 mm Installation plate 1 For best strength of INDOOR 130 mm...
  • Page 27 12.2.3 Indoor Unit Installation • Turn the unit over as shown during pull out the piping. • Do not turn over with front panel facing down, as it may cause front panel damage. Piping Piping Intake grille Right Rear piping 12.2.3.1 For the Right Rear Piping Tape it with piping in a...
  • Page 28 Replace the drain hose Rear view for left piping installation WAY TO REMOVE DRAIN HOSE • Drain hose is screwed. • After completion of work, please check for water leak. Drain hose Drain cap Connection cable Piping More than 950 mm Drain hose Sleeve for piping hole Please use wrench (7mm) or ratchet to loosen this screw...
  • Page 29 12.2.4.1 Wire Stripping, Connecting Requirement Wire stripping Conductor not Conductor Conductor fully inserted fully inserted over inserted Indoor/outdoor connection terminal board 5 mm No loose strand or more when inserted ACCEPT PROHIBITED PROHIBITED (gap between wires) RISK OF FIRE JOINING OF WIRES MAY CAUSE WARNING...

  • Page 30: 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). When installing at roof, please consider strong wind and earthquake. Please fasten the installation stand firmly with bolt or nails.
  • Page 31 12.3.3 Evacuation of the Equipment WHEN INSTALLING AN AIR CONDITIONER, BE SURE TO EVACUATE THE AIR INSIDE THE INDOOR UNIT AND PIPES in the following procedure. 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 32 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 × 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 33 12.3.6 How to Remove Bottom Plate When perform left piping, remove the bottom plate. To remove bottom plate: To fix back bottom plate: Pull the left & right caps down, then remove screws. Plate the hook of bottom plate into matching holes. Holding around screw area, pull the part downward &...
  • Page 34 12.3.9 Outdoor Unit Drain Water  Water will drip from the basepan hole area during defrost function.  To avoid water dripping, do not stand or place objects at this area. Hose 12.3.10 Check the Drainage  Open front panel and remove air filters. (Drainage checking can be carried out without removing the front grille.) ...

  • Page 35: 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 36 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 37: 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 38 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 39 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 40 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 41: 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 42: 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 43: 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 44 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 45 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 46 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 47: 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 48 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 49 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 50 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 applications Solidus Liquidus Kgf•cm temp material Liquidity is good at low temperature, 49.0 14.5...
  • Page 51 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 52 (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 53: 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 54 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 55: 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 56: 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 57 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. [Heating] ...

  • Page 58: Outdoor Fan Motor Operation

    14.3 Outdoor Fan Motor Operation  It starts when compressor starts operation and it stops 30 seconds after compressor stops operation.  During cooling operation, and outdoor ambient temperature is below 8°C, outdoor fan speed will be controlled according to outdoor piping temperature as following: OD Pipe Temperature 25°C 28°C...

  • Page 59: 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 60 14.4.2 Horizontal Airflow  Automatic horizontal airflow direction can be set using remote control; the vane swings left and right within the angles as stated below. For heating mode operation, the angle of the vane depends on the indoor heat exchanger temperature as Figure 1 below.

  • Page 61: Quiet Operation (Cooling Mode/Cooling Area Of Dry Mode)

    14.5 Quiet Operation (Cooling Mode/Cooling Area of Dry Mode)  Purpose To provide quiet cooling operation compare to normal operation.  Control condition Quiet operation start condition  When “POWERFUL/QUIET” button at remote control is pressed twice. QUIET will be shown on remote control display. Quiet operation stop condition ...

  • Page 62: Timer Control

    14.8 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. 14.8.1 ON Timer Control ...

  • Page 63: 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 64: 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 65 Compressor = OFF 103°C 88°C Compressor Frequency Reduce 99°C 87°C Compressor Frequency Limited 96°C 86°C Free Comp. temperature 15.1.5 Low Pressure Prevention Control (Gas Leakage Detection)  Control start conditions For 5 minutes, the compressor continuously operates and outdoor total current is between 0.75A and 0.95A, 1.38A.

  • Page 66: 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 67: Protection Control For Heating Operation

    15.2.6 Odor Cut Control  To reduce the odor released from the unit. Start Condition  AUTO FAN Speed is selected during COOL or DRY operation.  During freeze prevention control and timer preliminary operation, this control is not applicable. Control content ...

  • Page 68: Servicing Mode

    16. Servicing Mode 16.1 Auto OFF/ON Button 16.1.1 Mode setting by Emergency SW Emergency SW is Emergency SW is Emergency SW is Emergency SW is pressed pressed pressed pressed Forced Normal Forced Emergency Operation Cooling Cooling Heating Operation time check Operation Operation Operation...

  • Page 69: Remote Control Button

    REMOTE CONTROL NUMBER SWITCH MODE The Remote Control Number Switch Mode will be activated if the Auto OFF/ON button is pressed continuously for more than 11 seconds (3 “beep” sounds will occur at 11th seconds to identify the Remote Control Number Switch Mode is in standby condition) and press “AC RESET” button and then press any button at remote control to transmit and store the desired transmission code to the EEPROM.
  • Page 70  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 If no SW is pressed for 30secs, then special setting mode is cancelled and normal mode starts.
  • Page 71  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: By default is New Deice Judgement.

  • Page 72: Troubleshooting Guide

    17. Troubleshooting Guide 17.1 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 Such problems include insufficient insulation, problem with the Temperature (kg/cm (°C)
  • Page 73 17.1.1 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 74: Breakdown Self Diagnosis Function

    17.2 Breakdown Self Diagnosis Function 17.2.1 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 75: Error Codes Table

    17.3 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 76 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 77: Self-Diagnosis Method

    17.4 Self-diagnosis Method 17.4.1 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 78 17.4.2 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 79 17.4.3 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 80 17.4.4 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 81 17.4.5 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 82 17.4.6 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 83 17.4.7 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 84 17.4.8 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 85 17.4.9 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 86 17.4.10 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 87 17.4.11 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 88 17.4.12 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 89 17.4.13 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 90 17.4.14 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 91 17.4.15 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 92 17.4.16 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 93 17.4.17 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 94 17.4.18 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 95 17.4.19 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 96 17.4.20 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 97 17.4.21 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 98 17.4.22 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...
  • Page 99 17.4.23 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...
  • Page 100 17.4.24 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 101 17.4.25 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 102 17.4.26 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 103 17.4.27 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 104 17.4.28 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 105: Disassembly And Assembly Instructions

    18. 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. 18.1 Indoor Electronic Controllers, Cross Flow Fan and Indoor Fan Motor Removal Procedures 18.1.1...
  • Page 106 18.1.2 Front Grille Complete Removal Procedures 1. Push the intake grille further up then pull it towards you to remove it. Figure 3 Bottom Plate Screws and Caps 2. Remove the caps and screw from the Bottom Plate. Then pull out the Bottom Plate. Figure 4...
  • Page 107 To Reinstall the Bottom Plate Center hook Front hook Back hook Note! Align the bottom plate, then attached the back hooks (left and right) and center hook to its position. Then press firmly until the front hooks attached properly. Front Grille Complete Air Filter Frame –...
  • Page 108 18.1.3 Indoor Main Electronic Controller Removal Procedures 1. Remove 2 screws from the right side of Screws Front Grille Complete. Figure 6 Terminal Board Cover Control Board Cover Control board Figure 7...
  • Page 109 3. Detach the earth wire from 2. Remove 1 screw from the control board. the control board. Figure 8 4. Slightly pull out the control board. Figure 9...
  • Page 110 6. Remove the bottom control board cover by releasing 5 hooks. 5. Remove the upper control board cover by releasing 4 hooks. Figure 10 7. Remove the terminal board cover. 8. Detach lead wires AC1 (Black) and AC3 (Red) from the terminal board.
  • Page 111 18.1.4 Sub Electronic Controller Removal Procedures 1. Remove 2 screws from the left side of Front Grille Complete. Hooks Hook 2. Release 3 hooks then remove the control board cover. Figure 13 3. Remove all connectors then take out the sub PCB.
  • Page 112 18.1.5 Discharge Grille Complete Removal Procedures 1. Remove a screw from the drain hose. Drain Hose Note! PLEASE USE WRENCH (7mm) OR RATCHET TO LOOSEN THIS SCREW Figure 15 Air Filter Frame 2. Remove 2 screws from the right side of the Air Filter Frame. Figure 16 3.
  • Page 113 Discharge Grille Complete 4. Remove the screws from left and right of Discharge Grille Complete. Then pull out the Discharge Grille. Figure 18 18.1.6 Cross-Flow Fan Removal Procedures 1. Remove 2 screws form the Evaporator. 2. Remove screw from Cross-Flow Fan. Figure 19 3.
  • Page 114 18.1.7 Fan Motor Removal Procedures Particular Plate 1. Remove 4 screws from the Particular Plate Figure 21 Fan Motor 2. Pull out the Fan Motor to remove it Figure 22...

  • Page 115: Outdoor Electronic Controller Removal Procedure

    18.2 Outdoor Electronic Controller Removal Procedure 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. 1 Remove the 8 screws of the Front Panel. Fig.

  • Page 116: 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-LZ25TKE CU- LZ25TKE Indoor (°C) Outdoor DB (°C) 19.0 2308...
  • Page 117 19.1.2 CS-LZ35TKE CU- LZ35TKE Indoor (°C) Outdoor DB (°C) 19.0 3231 2529 3959 2879 3763 2624 3938 1886 22.0 3434 1864 4277 2052 4238 2040 4539 1848 15.7 2913 2401 2591 2157 3544 2852 3695 1982 18.4 2985 1759 1921 3727 1820 4061...

  • Page 118: 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-LZ25TKE CU- LZ25TKE Indoor (°C) Outdoor WB (°C) -20 / -21 -15 / -16 -7 / -8 2 / 1 7 / 6...

  • Page 119: Service Data

    20.1 Cool Mode Outdoor Air Temperature Characteristic Condition Room Temperature: 27/19°C, Cooling Characteristic Fan: High Piping Length: 5.0m Freq: Rated Fc 20.1.1 CS-LZ25TKE CU-LZ25TKE Current (Cool) 2.700 2.520 2.340 2.160 1.980 1.800 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 Outdoor Air Temperature (°C)
  • Page 120 20.1.2 CS-LZ35TKE CU-LZ35TKE Current (Cool) 4.700 4.280 3.860 3.440 3.020 2.600 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 Outdoor Air Temperature (°C) Lo Pressure (Cool) 1.000 0.960...

  • Page 121: Heat Mode Outdoor Air Temperature Characteristic

    20.2 Heat Mode Outdoor Air Temperature Characteristic Condition Room Temperature: 20°C, Heating Characteristic Fan: High Piping Length: 5.0m Freq: Rated Fh 20.2.1 CS-LZ25TKE CU-LZ25TKE Current (Heat) 2.900 2.600 2.300 2.000 1.700 1.400 Outdoor Air Temperature (°C) Hi Pressure (Heat) 2.200 2.020...
  • Page 122 20.2.2 CS-LZ35TKE CU-LZ35TKE Current (Heat) 4.100 3.700 3.300 2.900 2.500 2.100 Outdoor Air Temperature (°C) Hi Pressure (Heat) 2.300 2.140 1.980 1.820 1.660 1.500 Outdoor Air Temperature (°C) Outlet Air (Heat) 36.800 33.820 30.840 27.860 24.880 21.900 Outdoor Air Temperature (°C)

  • Page 123: 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-LZ25TKE CU-LZ25TKE CS-LZ35TKE CU-LZ35TKE Cooling Capacity 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...

  • Page 124: Exploded View And Replacement Parts List

    21. Exploded View and Replacement Parts List 21.1 Indoor Unit OFF/O N FAN SPEED MOD E AIR SWIN G TEMP TIMER O FF CANCEL AIR CON DITION ER 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 125 SAFETY REF. NO. PART NAME & DESCRIPTION CS-LZ25TKE CS-LZ35TKE REMARK CHASSIS COMPLETE ACXD50C00190 ← PARTICULAR PIECE CWD933989 ← INSTALLATION PLATE ACXH36-00010 ← FAN MOTOR L6CBYYYL0227 ← PARTICULAR PLATE - FAN MOTOR ACXD90-00030-B ← CROSS - FLOW FAN COMPLETE ACXH02C00130 ←...
  • Page 126 SAFETY REF. NO. PART NAME & DESCRIPTION CS-LZ25TKE CS-LZ35TKE REMARK CONTROL BOARD COMPLETE - SUB ACXH10C32360 ← DUCT - COMPLETE ACXD22C00010-B ← AIR FILTER CWD001307 ← AIR PURIFYING FILTER CWD001274 ← REMOTE CONTROLLER ACXA75C07870 ← (NOTE)  All parts are supplied from PAPAGZ, China (Vendor Code: 00029059).

  • Page 127: 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 128 ACXA43C00250 ← STRAINER CWB11094 ← EXPANSION VALVE CWB051078 ← CRANKCASE HEATER CWA341072 ← V - COIL COMPLETE (EXPENSION VALVE) CWA43C2603 ← PANASONIC BADGE CWE373439 ← NORDIC HEATPUMP LABEL CWE373985 ← SOUND PROOF MATERIAL CWG302740 ← SOUND PROOF MATERIAL CWG302745 ←...
  • Page 129 SAFETY REF. NO. PART NAME & DESCRIPTION CU-LZ25TKE CU-LZ35TKE REMARK HOLDER - SENSOR CWH32075 ← HOLDER - SENSOR CWH32143 ← HOLDER - SENSOR CWH321113 ← OPERATING INSTRUCTION ACXF55-11470 ← INSTALLATION INSTRUCTION ACXF60-16960 ← INSTALLATION INSTRUCTION ACXF60-16970 ← INSTALLATION INSTRUCTION ACXF60-16980 ←...

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