Panasonic CS-V28EKE CU-V28EKE Service Manual
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Panasonic CS-V28EKE CU-V28EKE Service Manual

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1 Safety Precautions----------------------------------------------- 3
2 Specifications ----------------------------------------------------- 5
2.1. CS-V28EKE CU-V28EKE ------------------------------ 5
3 Features ------------------------------------------------------------- 7
5 Dimensions--------------------------------------------------------- 9
5.1. Indoor Unit & Remote Control -------------------------- 9
5.2. Outdoor Unit -----------------------------------------------10
6 Refrigeration Cycle Diagram --------------------------------11
7 Block Diagram----------------------------------------------------12
8 Wiring Connection Diagram ---------------------------------13
9 Printed Circuit Board-------------------------------------------14
9.1. Indoor Unit--------------------------------------------------14
9.2. Indicator And Receiver ----------------------------------16
10 Installation Instruction-----------------------------------------17
CS-V28EKE CU-V28EKE
PAGE
10.1. Select The Best Location ------------------------------ 17
10.3. Indoor Unit ------------------------------------------------- 18
10.4. Outdoor Unit----------------------------------------------- 22
11 Operation And Control ---------------------------------------- 25
11.1. Cooling Operation---------------------------------------- 25
11.2. Soft Dry Operation --------------------------------------- 26
11.3. Automatic Operation ------------------------------------ 27
11.4. Operation Control ---------------------------------------- 27
11.5. Indoor Fan Speed Control ----------------------------- 29
11.6. Outdoor Fan Speed Control --------------------------- 31
11.9. Powerful Operation -------------------------------------- 32
11.10. Quiet Operation------------------------------------------- 32
© 2005 Panasonic HA Air-Conditioning (M) Sdn Bhd
(11969-T). All rights reserved. Unauthorized copying
and distribution is a violation of law.
Order No. MAC0512102C2
Air Conditioner
PAGE

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Summary of Contents for Panasonic CS-V28EKE CU-V28EKE

  • Page 1: Table Of Contents

    11.8. Horizontal Airflow Direction Control ----------------- 32 11.9. Powerful Operation -------------------------------------- 32 9.2. Indicator And Receiver ----------------------------------16 10 Installation Instruction-----------------------------------------17 11.10. Quiet Operation------------------------------------------- 32 © 2005 Panasonic HA Air-Conditioning (M) Sdn Bhd (11969-T). All rights reserved. Unauthorized copying and distribution is a violation of law.
  • Page 2 11.11. Ionizer Operation ----------------------------------------- 33 11.12. Timer Control ---------------------------------------------- 35 11.13. Random Auto Restart Control ------------------------ 35 11.14. Remote Control Signal Receiving Sound ---------- 35 12 Servicing Mode -------------------------------------------------- 36 12.1. Auto OFF/ON Button ------------------------------------ 36 13 Troubleshooting Guide---------------------------------------- 38 13.1.

  • 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 Carry out drainage piping as mentioned in installation instructions. If drainage is not perfect, water may enter the room and damage the furniture. Pb free solder has a higher melting point than standard solder; typically the melting point is 50 - 70°F (30 - 40°C) higher. Please use a high temperature soldering iron.

  • Page 5: Specifications

    2 Specifications 2.1. CS-V28EKE CU-V28EKE Unit CS - V28EKE CU - V28EKE Performance Test Condition EUROVENT Power Source (Phase, Voltage, Cycle) ø, V, Hz Single, 230, 50 Cooling Capacity kW (BTU/h) 7.91 (27,000) Moisture Removal l/h (Pint/h) 4.6 (9.7) Airflow Method...
  • Page 6 Unit CS - V28EKE CU - V28EKE Heat Exchanger Description Evaporator Condenser Tube material Copper Copper Fin material Aluminium (Pre Coat) Aluminium Fin Type Slit Fin Corrugated Fin Row / Stage (Plate fin configuration, forced draft) 2 x 14 2 x 34 44 ×...

  • Page 7: Features

    3 Features • High efficiency. • Operation Improvement • Compact design. - Quiet mode to provide quiet operation. • Wider range of horizontal discharge air. - Powerful mode to reach the desired room temperature • Air Filter with function to reduce dust and smoke. quickly.

  • Page 8: Location Of Controls And Components

    4 Location of Controls and Components Indoor Unit Outdoor Unit Remote Control...

  • Page 9: Dimensions

    5 Dimensions 5.1. Indoor Unit & Remote Control...

  • Page 10: Outdoor Unit

    5.2. Outdoor Unit...

  • Page 11: Refrigeration Cycle Diagram

    6 Refrigeration Cycle Diagram...

  • Page 12: Block Diagram

    7 Block Diagram...

  • Page 13: Wiring Connection Diagram

    8 Wiring Connection Diagram...

  • Page 14: Printed Circuit Board

    9 Printed Circuit Board 9.1. Indoor Unit BOTTOM VIEW...
  • Page 15 TOP VIEW...

  • Page 16: Indicator And Receiver

    9.2. Indicator And Receiver BOTTOM VIEW TOP VIEW...

  • Page 17: Installation Instruction

    10 Installation Instruction 10.1. Select The Best Location 10.2. Indoor/Outdoor Unit INDOOR UNIT Installation Diagram • There should not be any heat source or steam near the unit. • There should not be any obstacles blocking the air circulation. • A place where air circulation in the room is good. •...

  • Page 18: Indoor Unit

    10.3. Indoor Unit 10.3.1. HOW TO FIX INSTALLATION PLATE 10.3.2. TO DRILL A HOLE IN THE WALL The mounting wall is strong and solid enough to prevent it from INSTALL SLEEVE the vibration. PIPING 1. Insert the piping sleeve to the hole. 2.
  • Page 19 3. For the embedded piping 3. Set the piping direction. (For bottom piping, need to perform cutting and flaring process.) 4. Use 2 spanner to tighten the nut. (tighten torque 65 N ● Install accessory of tube ass’y 5. Check gas leakage at joint area. 1.
  • Page 20 (This can be used for left rear piping and left bottom piping also.)

  • Page 21: Connect The Cable To The Indoor Unit

    10.3.4. CONNECT THE CABLE TO THE INDOOR UNIT 1. The inside and outside connecting cable can be connected without removing the front grille. 2. Connecting cable between indoor unit and outdoor unit shall be approved polychloroprene sheathed 4 × 1.5 mm flexible cord, type designation 245 IEC 57 or heavier cord.

  • Page 22: Outdoor Unit

    10.4. Outdoor Unit 10.4.1. INSTALL THE OUTDOOR UNIT • After selecting the best location, start installation according to Indoor/Outdoor Unit Installation Diagram. 1. Fix the unit on concrete or rigid frame firmly and horizontally by bolt nut (ø10 mm). 2. When installing at roof, please consider strong wind and earthquake.

  • Page 23: Evacuation Of The Equipment

    10.4.3. 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. 1. Connect a charging hose with a push pin to the Low side of a charging set and the service port of the 3-way valve. •...

  • Page 24: Connect The Cable To The Outdoor Unit

    10.4.4. CONNECT THE CABLE TO THE OUTDOOR UNIT (FOR DETAIL REFER TO WIRING DIAGRAM AT UNIT) 1. Remove the control board cover from the unit by loosening the screw. 2. Connecting cable between indoor unit and outdoor unit shall be approved polychloroprene sheathed 4 x 1.5 mm flexible cord, type designation 245 IEC 57 or heavier cord.

  • Page 25: Operation And Control

    11 Operation And Control 11.1. Cooling Operation • Cooling operation can be set using remote control. • This operation is applied to cool down the room temperature reaches the setting temperature set on the remote control. • The remote control setting temperature, which takes the reading of intake air temperature sensor, can be adjusted from 16°C to 30°C.

  • Page 26: Soft Dry Operation

    11.2. Soft Dry Operation • Soft Dry operation can be set using remote control. • Soft Dry operation is applied to dehumidify and to perform a gentle cooling to the room. • This operation starts when the intake air temperature sensor reaches the setting temperature on the remote control. •...

  • Page 27: Automatic Operation

    11.3. Automatic Operation • Automatic operation can be set using remote control. • This operation starts to operate with indoor fan at SLo speed for 20 seconds to judge the intake air temperature. • After judged the temperature, the operation mode is determined by referring to the below standard. •...

  • Page 28: Minutes Time Save Control

    11.4.3. 7 Minutes Time Save Control • The compressor will start automatically if it has stopped for 7 minutes and the intake air temperature falls between the compressor ON temperature (A) and compressor OFF temperature (B) during the period. • This phenomenon is to reduce the built up humidity inside a room. 11.4.4.

  • Page 29: Indoor Fan Speed Control

    - Indoor fan motor operate at low fan speed or QLo. • This control is cancelled immediately when above condition is changed. • Dew prevention is control by: 1. Lo fan speed Lo fan is changed to Lo+ fan 2. QLo fan speed 11.5.
  • Page 30 11.5.2. Automatic Fan Speed Control • When set to Auto Fan Speed, the fan speed is adjusted between maximum and minimum setting as shown in the table. - Fan speed rotates in the range of Hi, Me and Lo-. - Deodorizing Control will be activated. - Auto Fan Speed during cooling operation: 1.

  • Page 31: Outdoor Fan Speed Control

    • Auto Fan Speed during Soft Dry operation: 1. Indoor fan will rotate alternately between off and Lo-. 2. At the beginning of each compressor start operation, indoor fan will increase fan speed gradually for deodorizing purpose. 3. When compressor at turn off condition for 6 minutes, indoor fan will start fan speed at Lo- to circulate the air in the room. This is to obtain the actual reading of intake air temperature.

  • Page 32: Horizontal Airflow Direction Control

    11.8. Horizontal Airflow Direction Control 11.8.1. Auto Control • When the horizontal airflow direction is set to Auto using the remote control, the vanes swings left and right for Cooling and Soft Dry (0°-44°) as shown in the diagram. • When stop operation using the remote control, the vanes is reset, and stop at the reset position.

  • Page 33: Ionizer Operation

    • Manual Fan Speed:- - RPM control during Lo cool - RPM control during Hi & Me cool • Auto Fan Speed:- • Quiet operation stops when:- - Quiet/Powerful button is pressed again. - Stopped by OFF/ON operation button. - Timer OFF activates. 11.11.
  • Page 34 1. Ionizer individual operation a. When air-conditioner unit is at “OFF” condition (standby) and ION operation button at the remote control is pressed, the Ionizer and indoor fan operations will turn on. Only ION LED will illuminates. Power LED maintain off. (1 → 2) b.

  • Page 35: Timer Control

    11.11.2. Error Detection Control • The error detection control is to inform user that error occurs at ionizer system and repairing job will be needed. • There are two types of error detection control: a. When Ionizer is ON - If ionizer feedback = Lo for 24 times within 11hr 30min, ION LED blinks continuously. b.

  • Page 36: Servicing Mode

    12 Servicing Mode 12.1. Auto OFF/ON Button • The “Auto OFF/ON Button” (behind the front grille) is used to operate the air conditioner if remote control is misplaced or malfunctioning. • Forced cooling operation is possible by pressing the “Auto OFF/ON Button” for more than 5s where “beep” sound is heard then release the button.
  • Page 37 TIMER TABLE Test Mode Name Time (When test point Remarks Short-circuited) Real Timer 1 hr. 1 min. 10 min. 10 sec. 1 min. 1 sec. Time Delay Safety Control 2 min. 58 sec. 0 sec. Forced Operation 60 sec. 0 sec. Time Save Control 7 min.

  • Page 38: Troubleshooting Guide

    13 Troubleshooting Guide 13.1. Refrigeration Cycle System In order to diagnose malfunctions, make sure that there are no electrical problems before inspecting the refrigeration cycle. Such problems include insufficient insulation, problem with the power source, malfunction of a compressor and a fan. The normal outlet air temperature and pressure of the refrigeration cycle depends on various conditions, the standard values for them are shown in the table on the right.

  • Page 39: Relationship Between The Condition Of The Air Conditioner And Pressure And Electric Current

    13.2. Relationship Between The Condition Of The Air Conditioner And Pressure And Electric Current Cooling Mode Condition of the air conditoner Low Pressure High Pressure Electric current during operation Insufficient refrigerant (gas leakage) Clogged capillary tube or Strainer Short circuit in the indoor unit Heat radiation deficiency of the outdoor unit Inefficient compression...

  • Page 40: Disassembly And Assembly Instructions

    14 Disassembly and Assembly Instructions High voltages are generated in the electrical parts area by the capacitor. Ensure that the capacitor has discharged sufficiently before proceeding with repair work. Failure to heed this caution may result in electric shocks. 14.1. Indoor Electronic Controllers, Cross Flow Fan and Indoor Fan Motor Removal Procedures 14.1.1.
  • Page 41 • Release the CN-TH connector. (Fig. 4) • Release the CN-ION connector. (Fig. 4) • Release the CN-SONIC connector. (Fig. 4) • Release the CN-STM1 connector. (Fig. 4) • Release the CN-DISP connector. (Fig. 4) • Release the CN-STM2 connector. (Fig. 4) •...
  • Page 42 14.1.5. To remove the Cross Flow Fan and Indoor Fan Motor • Remove the screw at the Cross Flow Fan. (Fig. 7) Reminder :- To reinstall the Fan Motor, please adjust the connector location is positioned 45° with Fan Motor before fixing Control Board Casing.

  • Page 43: Technical Data

    15 Technical Data 15.1. Thermostat Characteristics...

  • Page 44: Sensible Capacity Chart

    15.2. Sensible Capacity Chart 230V Outdoor Temp. (°C) Indoor wet bulb temp. 17.0°C 7.85 5.95 2.25 7.33 5.70 2.42 6.82 5.48 2.59 6.20 5.21 2.80 19.0°C 7.91 2.46 19.5°C 8.61 6.23 2.30 8.05 5.98 2.47 7.49 5.76 2.64 6.81 5.48 2.85 22.0°C 9.39...

  • Page 45: Operation Characteristics

    15.3. Operation Characteristics 15.3.1. CS-V28EKE CU-V28EKE...

  • Page 47: Exploded View And Replacement Parts List

    16 Exploded View and Replacement Parts List 16.1. CS-V28EKE 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 48 <Model: CS-V28EKE> REF NO. DESCRIPTION & NAME QTY. CS-V28EKE REMARKS CHASSY COMPLETE CWD50C1498 FAN MOTOR ARW42A8P60AC CROSS FLOW FAN COMPLETE CWH02C1044 SCREW - CROSS FLOW FAN CWH551146 BEARING ASS’Y CWH64K007 EVAPORATOR CWB30C1874 FLARE NUT (1/4”) CWT251030 FLARE NUT (5/8”) CWT251033 HOLDER SENSOR CWH32143 DISCHARGE GRILLE COMPLETE...

  • Page 49: Cu-V28Eke

    16.2. CU-V28EKE 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 50 <Model: CU-V28EKE> REF. NO. PART NAME & DESCRIPTION QTY. CU-V28EKE REMARKS CHASSY ASS’Y CWD50K2100 COMPRESSOR 5JS290DAD21 ANTI - VIBRATION BUSHING CWH50055 NUT - COMPRESSOR MOUNT CWH561049 PACKING CWB81043 CONDENSER CWB32C1787 SOUND PROOF BOARD ASS’Y CWH151051 FAN MOTOR BRACKET CWD541065 SCREW - FAN MOTOR BRACKET CWH551060J FAN MOTOR CWA951354J...

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