Panasonic CS-A181KR Service Manual

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Service Manual

CS-A181KR / CU-A181KR

CS-A241KR / CU-A241KR

Contents

Features .......................................................... 1

Functions ................................................... 2 - 4

Product Specifications ............................... 5 - 8

Dimensions .............................................. 9 - 10

Refrigeration Cycle Diagram ......................... 10

Block Diagram ............................................... 11

Wiring Diagram .............................................. 12

Operation Details ................................... 13 - 22

Installation Information .......................... 23 - 24

3-way Valves ......................................... 25 - 31

Servicing Information ............................. 32 - 35

Troubleshooting Guide .......................... 36 - 37

Technical Data ....................................... 38 - 40

Exploded View ......................................... 41, 43

Replacement Parts List ........................... 42, 44

Electronic Parts List ............................... 45 - 46

ORDER NO. MAC9903022C3

Room Air Conditioners

(183914D)

tion is a violation of law.

Table of Contents

Summary of Contents for Panasonic CS-A181KR

Page 1: Table Of Contents
ORDER NO. MAC9903022C3 Service Manual Room Air Conditioners CS-A181KR / CU-A181KR CS-A241KR / CU-A241KR Contents Features ............1 Functions ........... 2 – 4 Product Specifications ....... 5 – 8 Dimensions ..........9 – 10 Refrigeration Cycle Diagram ......10 Block Diagram ..........11 Wiring Diagram ..........
Page 2: Features
CS-A181KR WARNING 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.
Page 3: Functions
CS-A181KR Functions Remote Control OFF / ON I TEMP. Operation OFF / ON Room Temperature Setting • Temperature Setting (16˚C to 30˚C) • Automatic Operation MODE Operation Mode Selection 2˚C lower than standard Standard • Automatic Operation Mode AUTO •...
Page 4 CS-A181KR Functions Indoor Unit POWER I Power Switch OFF / ON Auto Restart Control • Operation is restarted after power failure AUTO at previous setting mode. OFF / ON Auto Operation Switch Anti-Freezing Control • Used when the remote control cannot be •...
Page 5 CS-A181KR Functions Outdoor Unit 2-Way Valve Control 4-Way Valve Control • 2-way valve is ON for 1 minutes after • When the unit is switched to "OFF" during compressor start. Other than this, 2-way Heating operation, 4-way valve stays at valve is OFF.
Page 6: Product Specifications
CS-A181KR Product Specifications Unit CU-A181KR CS-A181KR 5.20 - 5.15 Cooling Capacity Btu/h 17,700 - 17,600 6.20 - 6.15 Heating Capacity Btu/h 21,100 - 21,000 Moisture Removal Pint/h Phase Single Power Source 240 - 230 Cycle OUTLET SIDE VIEW TOP VIEW...
Page 7 CS-A181KR Product Specifications Unit CS-A181KR CU-A181KR Heat Evaporator Description Condenser Exchanger Tube material Copper Copper Fin material Aluminium Aluminium Fin Type Slot Fin Corrugated Fin Row / Stage (Plate fin configuration, forced draft) 2 × 14 2 × 26 769.2 Size (W ×...
Page 8 CS-A181KR Product Specifications Unit CU-A241KR CS-A241KR 6.45 - 6.40 Cooling Capacity Btu/h 22,000 - 21,800 7.80 - 7.65 Heating Capacity Btu/h 26,600 - 26,100 Moisture Removal Pint/h Phase Single Power Source 240 - 230 Cycle OUTLET SIDE VIEW TOP VIEW...
Page 9 CS-A181KR Product Specifications Unit CS-A241KR CU-A241KR Heat Evaporator Description Condenser Exchanger Tube material Copper Copper Fin material Aluminium Aluminium Fin Type Slot Fin Corrugated Fin Row / Stage (Plate fin configuration, forced draft) 2 × 14 2 × 26 769.2 Size (W ×...
Page 10: Dimensions
CS-A181KR Dimensions CS-A181K / CS-A241K <Top View> <Front View> Air intake direction Right piping hole Approx 2,100 Air outlet direction <Side View> Left piping hole Lower piping hole 48.5 Remote control transmitter Installation plate hooks Drain ports Gas side Liquid side Approx.
Page 11: Refrigeration Cycle Diagram
CS-A181KR Dimensions CU-A181K / CU-A241K Required space for installation 56.3 Air intake direction 10cm 10cm 100cm Anchor bolt pitch 330 x 540 Air outlet direction Slots (12 x 17) Four places 3-way valve at liquid side 3-way valve at gas side...
Page 12: Block Diagram
CS-A181KR Block Diagram CS-A181KR / CU-A181KR CS-A241KR / CU-A241KR – 11 –...
Page 13: Wiring Diagram
CS-A181KR Wiring Diagram CS-A181KR / CU-A181KR CS-A241KR / CU-A241KR AC 240-230V, 50Hz POWER SUPPLY CORD CORE (A241K ONLY) ELECTRONIC WIRELESS CONTROLLER REMOTE RECEIVER+ CONTROL DISPLAY LAMP YLW/GRN CN-DISP (WHT) CN-T(WHT) T (BLK) T (BLK) THERMAL FUSE (102°C) PUMP AUTO SW...
Page 14: Operation Details
CS-A181KR Operation Details 1) Cooling Mode Operation Cooling in operation according to Remote Control setting. Time Delay Safety Control (3 minutes) • When the compressor is stopped by Power Switch, Remote Control or there is a power failure, it restarts after 3 minutes when the Power Switch, Remote Control is turned ON or the power supply is resumed.
Page 15 CS-A181KR Operation Details Automatic Fan Speed Mode When Automatic Fan Speed is selected at Remote Control during cooling operation. • Fan speed rotates in the range of Hi to Me. • Deodorizing Control. Indoor stop stop stop stop 40" 20"...
Page 16 CS-A181KR Operation Details 2) Soft Dry Mode Operation • The unit starts cooling operation until the room temperature reaches the setting temperature set on the Remote Control, and then Soft Dry operation will start. • During Soft Dry operation, the Indoor Fan operates with SLo speed.
Page 17 CS-A181KR Operation Details Soft Dry Operation Time Diagram a b c d e f g h i j k l m n o p q r s t u v Intake Air Temperature Cooling ON 1.5°C Set Temp. Cooling OFF 1.0°C...
Page 18 CS-A181KR Operation Details 3) Heating Mode Operation • Heating in operation according to Remote Control setting. Time Delay Safety Control • When the compressor is stopped by Power Switch, Remote Control or there is a power failure, it restarts after 3 minutes when the Power Switch, Remote Control is turned ON or the power supply is resumed.
Page 19 CS-A181KR Operation Details Automatic Fan Speed Mode When Automatic Fan Speed is selected at Remote Control during heating operation. • Fan speed rotates in the range of Me SLo according to the heat exchanger temperature. ° ° Manual Fan Speed Mode...
Page 20 CS-A181KR Operation Details Deicing Control Deice starts to prevent frosting at outdoor heat exchanger. • Normal Deicing Deice operation detection commences in Heating operation starts or 60 minutes after previous deice operation. If the outdoor piping temperature drops to –4°C or 50 sec. continuosly during compressor is in operation, deice will start.
Page 21 CS-A181KR Operation Details b) Overload Deicing Time Diagram Outdoor 12°C <Description of operation> a – i Overload control. Heat i – l Overload deicing. -3°C Exchanger l – m Hot start (add 4 min delay timing). Temp. -4°C m – r Overload control.
Page 22 CS-A181KR Operation Details 5) Sleep Mode Auto Operation Cooling or Soft Dry Operation Approx. 0.5°C increase When you press the SLEEP Mode, the following movement will start TEMP. to avoid overcooling. Approx. 0.5°C increase Approx. 8 hours after sleep shift operation •...
Page 23 CS-A181KR Operation Details 8) Airflow Direction Control Airflow Direction Auto-Control Airflow Direction Manual Control • When set a Airflow Direction Auto-Control with • When the airflow direction set button is pressed, remote control, the louver swings up and down as the automatic airflow is released and the airflow shown in the diagram.
Page 24: Installation Information
CS-A181KR Installation Information Attached accessories Accessories part Qty. Accessories part Qty. Remote control Installation plate Installation plate fixing screw Battery Vinyl tape Air purifiying filter Vinyl tape Drain elbow Band Accessories: Flaring piping kit CZ-4F5, 7, 10AN (A181K) CZ-52F5, 7, 10AN (A241K)
Page 25 CS-A181KR Installation Information Indoor / Outdoor unit installation diagram Length of power supply cord Piping direction Attention not to bend up drain hose (Front side) about 1 m about 2 m Right Right < < < < rear Left Left...
Page 26 CS-A181KR 3-way Valve 3-way Valve (Liquid Side) 3-way Valve (Gas Side) Valve cap Flare nut Hexagonal wrench(4 mm) Open position Flare nut Open position Closed position Closed position piping piping connection connection Service port Service port Service Service port cap...
Page 27: 3-Way Valves
CS-A181KR 1 Evacuation of Installation When installing an air conditioner, be sure to evacuate the air inside the indoor unit and pipes in the following procedure. Required tools: hexagonal wrench, adjustable wrench, The air in the indoor unit and in the piping must be torque wrenches, wrench to hold the purged.
Page 28 CS-A181KR 2 Pumping down (Indoor unit) (Liquid side) (Outdoor unit) 3-way valve Close (Gas side) 3-way valve CLOSE Open Refrigerant Reclaiming Equipment CLOSE Procedure: (1) Confirm that both the 3-way valves are set to the (6) Operate the air conditioner at the cooling cycle open position.
Page 29 CS-A181KR 3 Evacuation of Re-installation WHEN RE-INSTALLING AN AIR CONDITIONER, BE If air remains in the indoor unit and refrigeration SURE TO EVACUATE THE AIR INSIDE THE INDOOR pipes, it will affect the compressor, reduce to cooling UNIT AND PIPES in the following procedure.
Page 30 CS-A181KR 4 Balance refrigerant of the 3-way valves (Lack of refrigerant in the refrigeration cycle) (Indoor unit) (Liquid side) (Outdoor unit) 3-way valve Open (Gas side) 3-way valve OPEN Open Refrigerant Reclaiming Equipment OPEN Procedure: (1) Confirm that both the 3-way valves are set to the opened position.
Page 31 CS-A181KR 5 Evacuation (No refrigerant in the refrigeration cycle) (Indoor unit) (Liquid side) (Outdoor unit) 3-way valve Open (Gas side) 3-way valve OPEN Open Vacuum pump OPEN Procedure: (1) Connect the vacuum pump to the charge set’s centre hose. (2) Turn on the vaccuum pump to evacuate the unit.
Page 32 CS-A181KR 6 Gas charging (After Evacuation) (Indoor unit) (Liquid side) (Outdoor unit) 3-way valve Open (Gas side) 3-way valve Check valve CLOSE Open Charging cylinder OPEN Procedure: (5) Mount the valve stem nuts and the service port (1) Connect the charge hose to the charging cylinder.
Page 33: Servicing Information
CS-A181KR Servicing Information (A) Disassembly of the parts (Indoor Unit) Electronic Inspection points for the Indoor Electronic Controller Controller 1. The Electronic Controller, a signal Receiver and an Indicator can be seen by removing the Front Grille and Control Board Cover, as shown in the Fig. 1.
Page 34 CS-A181KR Servicing Information 3. Remove the Discharge Grille. Remove the Discharge Grille and then pull the Dis- charge Grille in a down and forward direction. Fig. 4 Fan Motor 4. Remove the Indoor Fan Motor Loosen the Fan Mounting Screw at the junction with Cross Flow Fan.
Page 35 CS-A181KR Servicing Information Cross Flow Fan Removal Procedure 1. Remove the Fan Mounting Screws and Bearing. (Refer to No. 4 of Indoor Fan Motor the removal procedure) 2. Loosen the 2 screws mounted at the left side of the evaporator.
Page 36 CS-A181KR Servicing Information Reset terminal (C) Remote Control Transmission Setting • Remote Control Reset When the batteries are inserted for the first time, or the batteries are replaced, all the indications will blink and the remote control might not work.
Page 37: Troubleshooting Guide
CS-A181KR Troubleshooting Guide Refrigeration cycle system In order to diagnose malfunctions, make sure that Normal Pressure and Outlet Air Temperature (Standard) there are no electrical problems before inspect- Gas pressure Outlet air ing the refrigeration cycle. Such problems include temperature...
Page 38 CS-A181KR Troubleshooting Guide 1. Relationship between the condition of the air conditioner and pressure and electric current Cooling Mode Heating Mode Condition of the air Electric Electric Low Pressure High Pressure Low Pressure High Pressure conditioner current during current during...
Page 39: Technical Data
CS-A181KR Technical Data L L L L L Thermostat characteristics CS-A181K / CS-A241K • Cooling • Soft Dry • Heating (°C) (°C) (°C) COMP. OFF = SET TEMPERATURE COMP. OFF = SET TEMPERATURE COMP. ON COMP. ON COMP. ON COMP. ON COMP.
Page 40 CS-A181KR Technical Data L L L L L Operation characteristics CS-A181K / CU-A181K • Piping Length Characteristic (Cooling) • Cooling Characteristic 230V 230V 240V 240V 14.0 13.5 14.0 13.0 12.5 13.5 12.0 13.0 0.46 0.44 0.45 0.43 0.44 0.42 0.43 0.41...
Page 41 CS-A181KR Technical Data L L L L L Operation characteristics CS-A241K / CU-A241K • Cooling Characteristic • Piping Length Characteristic (Cooling) 230V 230V 240V 240V 13.0 13.0 12.5 12.5 12.0 12.0 11.5 11.5 11.0 11.0 0.42 0.42 0.41 0.41 0.40 0.40...
Page 42: Exploded View
CS-A181KR Exploded View CS-A181KR / CS-A241KR " & < > – 41 –...
Page 43: Replacement Parts List
CS-A181KR Replacement Parts List <Model: CS-A181KR / CS-A241KR> REMARKS DESCRIPTION & NAME CS-A181KR CS-A241KR ← CHASSY COMPLETE CWD50C369 ← CHASSY BACK COVER CWD93956 FAN MOTOR CWA98273 CWA98273 ← CWH02C058 CROSS FLOW FAN COMPLETE ← SCREW – CROSS FLOW FAN CWH4580304 ←...
Page 44 CS-A181KR Exploded View CU-A181KR / CU-A241KR " < > " & – 43 –...
Page 45 CS-A181KR Replacement Parts List REMARKS DESCRIPTION & NAME CU-A181KR CU-A241KR ← CHASSY ASS’Y CWD50K514B ← SOUND PROOF BOARD CWH15223 ← FAN MOTOR BRACKET CWD54145 ← SCREW - FAN MOTOR BRACKET CWH55101 ← PARTICULAR PLATE F/M (L) CWD90835 ← PARTICULAR PLATE F/M (R)
Page 46: Electronic Parts List
CS-A181KR Electronic Parts List Electronic Controller : CWA742082 (CS-A181K) Electronic Controller : CWA742083 (CS-A241K) SYMBOL DESCRIPTION & NAME PART NO. INTEGRATED CIRCUIT A52D011W216 INTEGRATED CIRCUIT A52C096 INTEGRATED CIRCUIT A52C050 INTEGRATED CIRCUIT A52MPA2003C INTEGRATED CIRCUIT A52BR9020 INTEGRATED CIRCUIT A52MPC393C INTEGRATED CIRCUIT...
Page 47 CS-A181KR Electronic Parts List Electronic Controller : CWA741314 (CU-A181K) Electronic Controller : CWA741315 (CU-A241K) SYMBOL DESCRIPTION & NAME PART NO. INTEGRATED CIRCUIT A52C78414Y INTEGRATED CIRCUIT A52C094 INTEGRATED CIRCUIT A52C040 INTEGRATED CIRCUIT A52MPA2003C TRANSISTOR A55C1740STPQ A55DTC113ZST TRANSISTOR D1 ~ D6 A54MA165TA5...
Page 48 CS-A181K/A241K CS-A181K/A241K CS-A181K/A241K CS-A181K/A241K ELECTRONIC CIRCUIT DIAGRAM • CS-A181K / CU-A181K SERIES • CS-A241K / CU-A241K SERIES Fig. 1 Senser (Thermistor) AC 240-230V 50Hz Characteristics SINGLE PHASE TRANSFORMER CWA40C246 ELECTRONIC CIRCUIT TEMPERATURE POWER FUSE TEMPERATURE SUPPLY 102°C FUSE 113°C Pipe Temp. Sensor SWITCH ELECTRONIC CIRCUIT (XH-3) BLUE...
Page 49 CS-A181K/A241K CS-A181K/A241K CS-A181K/A241K CS-A181K/A241K TIMER TABLE How to use electronic circuit diagram ELECTRONIC CIRCUIT DIAGRAM PRINT PATTERN Test mode • INDOOR UNIT PRINTED CIRCUIT BOARD Before using the circuit diagram, read the following carefully. Name REMOTE CONTROL Time When test point Remarks Short-circuited * Voltage measurement...
Page 50 Printed in Malaysia MACC P990400500YW...

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Cu-a181kr Cs-a241kr Cu-a241kr

Panasonic CS-A181KR Service Manual

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