Panasonic Cw Xc91jm Repair Manual
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1 Functions 2 2 Product Specifications 4 3 Dimensions 5 4 Refrigeration Cycle Diagram 6 5 Block Diagram 6 6 Wiring Diagram 7 7 Air Conditioner Performance Evaluation 7 8 Troubleshooting Guide 8 9 Operation Details 10 10 Operating Instructions 13 © 2002 Matsushita Industrial Corp. Sdn. Bhd. (11969-T). All rights reserved. Unauthorized copying and distribution is a violation of law. CW-XC90JM 11 Installation Instructions 18 12 Care and Maintenance 21 13 Servicing Information 22 14 Technical Data 24 15 Electronic Circuit / Main 25 16 Electronic Circuit / Indicator Complete 25 17 Electronic Circuit Diagram 26 18 Exploded View 29 19 Replacement Part List 30 Room Air Conditioner CONTENTS Page Page Order No. MAC0210045C3
2 Product Specifications UnitCW-XC90JM PhaseØSingle VoltageV220 ~ 240 FrequencyHz50 Cooling CapacitykW Btu/h2.64 ~ 2.67 9000 ~ 9100 Running CurrentA4.4 ~ 4.3 Input PowerW935 ~ 975 EERBtu/hW9.6 ~ 9.3 Starting CurrentA16.9 Compressor OutputW750 Fan Motor OutputW58 Noise LevelIndoor (High / Low)db(A)47 / 43 ~ 49 / 45 Outdoor (High / Low)db(A)57 / 53 ~ 58 / 54 Moisture RemovalL/h Pt/h1.6 3.4 Air CirculationIndoorm3/min (ft3/min)7.2 (254) Outdoorm3/min (ft3/min)11.1 (392) DimensionsHeightmm inches346 (13-5/8) Widthmm inches450 (17-23/32) Depthmm inches580 (22-27/32) Net Weightkg lb29 64 Gross Weightkg lb31 68 Refrigerant (R-22)g oz490 17.3 • Specifications are subject to changewithout notice for further improvement. 4
3 Dimensions 3.1. Top View, Front View and Side View 3.2. Unit ItemUnit: Inch (mm) A - Width17-23/32” (450) B - Height13-10/16” (346) C - Depth22-27/32” (580) D11-9/16” (293) E1-15/32” (37) F10-14/16” (276) G11-9/16” (293) 5
4 Refrigeration Cycle Diagram ItemPressure (MPa)Temperature (°C) A2.04 ~ 2.2468 ~ 82 B1.87 ~ 2.0735 ~ 45 C0.54 ~ 0.607~13 D0.51 ~ 0.578~16 Note: Indoor temperature at 27°C (DB), 19°C(WB) and Outdoor at 35°C (DB),24°C (WB)forCooling. 5 Block Diagram 6
6 Wiring Diagram 6.1. Resistance of Fan Motor windings and the rated Capacitor ModelCW-XC90JM ConnectionCWA921156 Blue - Yellow93.8Ω Yellow - Orange58.7Ω Yellow - Brown13.0Ω Red - Yellow143.0Ω 6.2. Resistance of Compressor windings and the rated Capacitor ModelCW-XC90JM ConnectionCWB092141 C-R3.597Ω C-S4.868Ω CapacitorCWA312075 (25µF, 370VAC) Note: Resistance at 20°C of Ambient Temperature. 7 Air Conditioner Performance Evaluation Suction & Discharge Air Temperature DifferenceCurrentDeterminationRemedy • 8°C and over (14.4°F) • As specified. • Nothing wrong. • None. • 8°C and over (14.4°F) • Higher than specified. • Nothing wrong, outdoor temperature is too high, heat radiation is not efficient. • Improve heat radiation. • Under 8°C (14.4°F) • Higher than specified. • Something is preventing heat radiation. • Excessive amount of refrigerant. • Improve heat radiation. • Under 8°C (14.4°F) • Lower than specified. • Leakage of refrigerant or refrigerant system is blocked. • Locate and repair leak. • Flush refrigeration cycle. • Under 8°C (14.4°F) • Higher than specified by 50%. • Compressor defect. • Replace the compressor. Note: Room air humidity is relatively higher, the temperature difference will be smaller. 7
8 Troubleshooting Guide Warning: Disconnect unit from electrical power supply before making any electrical checks. TroubleCheckResultCausesRemedy Fan Motor and Compressor won’t run. • Supply Voltage • Fuse Box or Circuit Breaker. • Power cord or Wiring Harness. • Temperature Setting. • Less than 10% by Rated. • Open Contacts. • Pulled loose or Shorted. • Higher than room temperature • Temporary or Permanent? • Customer Restarted unit immediately without waiting 3 minutes. • Consult ELECTRICIAN, if permanent. • W AIT FOR 3 MINUTES. • Repair Open Circuit. • Repair or Replace it. • Set it LOWER. Fan motor won’t run (Compressor run). • Objects around Fan. • RESISTANCE between Wires. • Capacitor Fan Motor. • Locked Fan. • Shorted / Open circuit. • OHM Meter doesn’t Deflect. • Fan Hitting Cowling. • Foreign Materials. • Frozen Bearings. • Shorted or Burned out. • Capacitor Defect. • Adjust Fan position setting screw. • Remove Foreign Materials. • Replace Fan Motor. • Replace Fan Motor. • Replace Capacitor Fan. Compressor won’t run (Fan run). • Temperature setting. • RESISTANCE between Terminal and the Compressor Body. • RESISTANCE between Terminals. • Overload Protector. • Capacitor Compressor. • Thermostat. • Higher than room temp. • Shorted. • Shorted. • Infinity between Terminals. • OHM Meter doesn’t deflect. • No click heard. • W inding Coil touched to the compressor shell. • Rear Shorted or Burnt out. • Rear Shorted or Burnt out. • Overload Protector defect. • Capacitor defect. • Thermostat defect. • Set it lower. • Replace Compressor. • Replace Compressor. • Replace Overload Protector. • Replace Capacitor Compressor. • Replace Thermostat. Air Swing won’t run • Air Swing Switch. • OFF position. • Set it ON. • No contact at position. • Open circuit • Replace Air Swing Switch. • Resistance between wires. • OHM Meter doesn’t deflect. • Shorted or open circuit. • Replace Air Swing Motor. 8
TroubleCheckResultCausesRemedy Insufficient cooling. • Temperature Setting. • Ventilation door open. • Air filter dirty. • Location of installation. • Evaporator/Conden ser Coil obstructed. • Unit capacity for the room too small. • Temperature difference and running current. • Higher than room temperature. • Open. • Clogged or dirty. • Sunlight hitting outdoor side. • Obstacles. • Clogged or dirty. • Not satisfied. • REFER TO PERFORMANCE EVALUATION. • Reduces capacity. • Restricted air circulation. • Restricted Heat Exchanger. • Restricted Heat Exchanger. • Restricted air circulation. • Leakage of refrigerant or refrigeration system is blocked. • Set it lower. • Close ventilation door. • Clean or replace Air Filter. • Consider building an AWNING. • Remove obstacles or reinstall unit. • Clean the coils. • Replace the unit with bigger one. • Locate repair leak. • Flush refrigeration cycle. Noise • Source of Noise • Vibration. • Intermittent Noise. • Faulty installation. • Fan hitting objects. • Refrigerant tubing touching each other. • Fan splashing Drain Water. • Reinstall unit or Reinforce the installation. • Adjust Fan position or remove foreign materials. • About 1/2” Clearance needed. • Remove drain plug and mount a drain pan to remove the water. • Set the Drain outlet downward, so that the Drain water can run off. Waterdripping inside room. • Unit installation. • Drain Tray-Styrofoam pieces blocking drain channel. • Tilted to inside room. • Clogged. • Restricted run off. • Clogged or blocked. • Tilt unit to outside slightly. • Remove the foreign materials. Frozen Evaporator • Temperature setting. • Air Filter/Evaporator. • Temperature difference and running current. • Set too low for ambient conditions. • Clogged or Dirty. • REFER TO PERFORMANCE EVALUATION • Outdoor temperature low (Night time). • Restricted air circulation. • Leakage of refrigerant or refrigeration system is blocked. • Set the Main Control knob to Fan to melt ice and set the Temperature Control to higher temperature. • Clean Air filter/Evaporator. • Locate and repair leak. • Flush refrigeration cycle. 9
9 Operation Details 9.1. Fan Mode Operation • Fan operation only. Fan inoperation according to Remote Control or Main Unit (Touch Control Panel) setting. 9.1.1. Manual Setting of Fan Speed • Basic Fan Speed can be manually adjusted (Lo or Hi) byusing the Fan Speed Selection Button/Pad at Remote Control or Main Unit (Touch Control Panel). 9.2. Cooling Mode Operation • Cooling in operation according to Remote Control or Main Unit (Touch Control Panel) setting. 9.2.1. Time Delay Safety Control (3 minute) • When the compressor is stopped by Operation Switch at the Remote Control or Main Unit (Touch Control Panel), it restart after 3 minutes when the Operation Switch at the Remote Control or Main Unit (Touch Control Panel) is turned ON. • When the setting temperature is reached during cooling operation, the compressor stops and it will not start for 3 minutes. • Protection of compressor to balance the pressure in the refrigeration cycle for 3 minutes. 9.2.2. 7 minutes Time Saved Control • The compressor will start automatically if it has stopped for 7 minutes even if the room temperature is between the compressor ON temperature and OFF temperature. 9.2.3. Starting Current Control • When the compressor and fan motor are simultaneously started, the fan motor will operate 1.6 seconds later. 9.2.4. Freeze Prevention Control If the temperature of the indoor heat exchanger falls continuously below 10°C for 3 minutes or more, the compressor turns off to protect the heat exchanger from freezing. The fan speed setting remains the same. Compressor restarts when the heat exchanger temperature rises to 12°C (Recovery). *3 minutes waiting of Time DelaySafety Control isvalid for Cooling Operation. 9.2.5. Compressor Reverse Rotation Protection Control • If the compressor is operating continuously for 5 minutes or longer and the temperature difference between intake air and heat exchanger is 2.5°C or less for 2 minutes,compressor will stop and restart automatically (Time DelaySafety Controlis valid). 10