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Panasonic CS-E18NKUA Service Manual

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Table of Contents
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.
In order to avoid frostbite, be assured of no refrigerant leakage during the installation or repairing of refrigerant circuit.

TABLE OF CONTENTS

1. Safety Precautions.............................................3
2. Specification .......................................................5
3. Features ..............................................................8
4.1
Indoor Unit....................................................9
4.2
Outdoor Unit .................................................9
4.3
Remote Control ............................................9
5. Dimensions .......................................................10
5.1
Indoor Unit..................................................10
5.2
Outdoor Unit ...............................................11
6. Refrigeration Cycle Diagram...........................12
7. Block Diagram ..................................................13
8. Wiring Connection Diagram............................14
CS-E18NKUA
CS-E24NKUA
WARNING
PRECAUTION OF LOW TEMPERATURE
9. Electronic Circuit Diagram ..............................16
10. Printed Circuit Board .......................................18
11. Installation Instruction.....................................22
12. Operation Control.............................................30
Indoor Unit
8.1
Indoor Unit..................................................14
8.2
Outdoor Unit ...............................................15
9.1
Indoor Unit..................................................16
9.2
Outdoor Unit ...............................................17
10.1
Indoor Unit..................................................18
10.2
Outdoor Unit ...............................................20
11.1
Select the Best Location ............................22
11.2
11.3
Indoor Unit..................................................23
11.4
Outdoor Unit ...............................................27
12.1
Basic Function............................................30
© Panasonic Appliances Air-Conditioning (M) Sdn. Bhd. 2012.
Unauthorized copying and distribution is a violation of law.
Order No: PAPAMY1204088CE
Outdoor Unit
CU-E18NKUA
CU-E24NKUA

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  • Page 1: Table Of Contents

    Indoor Unit..........23 6. Refrigeration Cycle Diagram......12 11.4 Outdoor Unit ..........27 7. Block Diagram ..........13 12. Operation Control..........30 8. Wiring Connection Diagram......14 12.1 Basic Function..........30 © Panasonic Appliances Air-Conditioning (M) Sdn. Bhd. 2012. Unauthorized copying and distribution is a violation of law.
  • Page 2 12.2 Indoor Fan Motor Operation .......31 12.3 Outdoor Fan Motor Operation ....32 12.4 Airflow Direction..........32 12.5 Quiet Operation (Cooling Mode/Cooling Area of Dry Mode)..........33 12.6 Quiet Operation (Heating) ......34 12.7 Powerful Mode Operation......34 12.8 Timer Control..........35 12.9 Auto Restart Control ........35 12.10 Indication Panel ..........35 13.
  • 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. The caution items stated here must be followed because these important contents are related to safety.
  • Page 4 19. During installation, install the refrigerant piping properly before run the compressor. (Operation of compressor without fixing refrigeration piping and valves at opened condition will cause suck-in of air, abnormal high pressure in refrigeration cycle and result in explosion, injury etc.). 20.
  • Page 5: Specification

    2. Specification Indoor CS-E18NKUA CS-E24NKUA Model Outdoor CU-E18NKUA CU-E24NKUA Performance Test Condition Phase, Hz Single, 60 Single, 60 Power Supply Min. Mid. Max. Min. Mid. Max. Min. Mid. Max. Min. Mid. Max. 1.70 5.01 5.80 1.70 5.01 5.80 1.70 7.02 8.00...
  • Page 6 Type Propeller Propeller Material Motor Type DC Motor (8 poles) DC Motor (8 poles) Input Power Output Power Cooling: 700 Cooling: 700 Speed Heating: 700 Heating: 750 Moisture Removal L/h (Pt/h) 1.4 (3.0) 3.6 (7.6) Cooling : 11.74 (410) Cooling : 11.97 (420) /min (ft /min) Heating : 12.88 (450)
  • Page 7 DRY BULB WET BULB DRY BULB WET BULB Maximum 89.6 73.4 89.6 73.4 Indoor Operation Range (Cooling) Minimum 60.8 51.8 60.8 51.8 Maximum 109.4 78.8 109.4 78.8 Outdoor Operation Range (Cooling) Minimum Maximum 86.0 86.0 Indoor Operation Range (Heating) Minimum 60.8 60.8 Maximum...
  • Page 8: Features

    3. Features Inverter Technology Wider output power range Energy saving Quick Cooling More precise temperature control Environment Protection Non-ozone depletion substances refrigerant (R410A) Long Installation Piping Long piping up to 100 foot Easy to use remote control Quality Improvement Random auto restart after power failure for safety restart operation Gas leakage protection Prevent compressor reverse cycle Inner protector to protect Compressor...
  • Page 9: Location Of Controls And Components

    4. Location of Controls and Components Indoor Unit Outdoor Unit Remote Control...
  • Page 10: Dimensions

    5. Dimensions Indoor Unit...
  • Page 11: Outdoor Unit

    Outdoor Unit...
  • Page 12: Refrigeration Cycle Diagram

    6. Refrigeration Cycle Diagram...
  • Page 13: Block Diagram

    7. Block Diagram...
  • Page 14: Wiring Connection Diagram

    8. Wiring Connection Diagram Indoor Unit...
  • Page 15: Outdoor Unit

    Outdoor Unit...
  • Page 16: Electronic Circuit Diagram

    9. Electronic Circuit Diagram Indoor Unit...
  • Page 17: Outdoor Unit

    Outdoor Unit...
  • Page 18: Printed Circuit Board

    10. Printed Circuit Board 10.1 Indoor Unit 10.1.1 Main Printed Circuit Board...
  • Page 19 10.1.2 Power Printed Circuit Board 10.1.3 Indicator and Receiver Printed Circuit Board...
  • Page 20: Outdoor Unit

    10.2 Outdoor Unit 10.2.1 Main Printed Circuit Board...
  • Page 21 10.2.2 Noise Filter Printed Circuit Board...
  • Page 22: Installation Instruction

    11. Installation Instruction 11.1 Select the Best Location 11.2 Indoor/Outdoor Unit Installation Diagram 11.1.1 Indoor Unit Do not install the unit in excessive oil fume area such as kitchens, workshops and etc. There should not be any heat source or steam near the unit.
  • Page 23: Indoor Unit

    11.3 Indoor Unit 11.3.1 How to Fix Installation Plate The mounting wall must be strong and solid enough to prevent it from the vibration. The center of installation plate should be at more than at right and left of the wall. The distance from installation plate edge to ceiling should more than From installation plate left edge to unit’s left side is From installation plate right edge to unit’s right side is...
  • Page 24 11.3.3 Indoor Unit Installation 11.3.4 For the right rear piping 11.3.5 For the right bottom piping 11.3.6 For the embedded piping (This can be used for left rear piping and bottom piping also.)
  • Page 25: Connect The Cable To The Indoor Unit

    11.3.7 Connect the Cable to the Indoor Unit 1. The inside and outside connecting cable can be connected without removing the front grille. 2. Unscrew the conduit cover and fix the conduit connector to conduit cover with lock nut, then secure it against chassis.
  • Page 26 11.3.8 Wiring Stripping and connecting requirement 11.3.9 Cutting and flaring the piping Please cut using pipe cutter and then remove the burrs. Remove the burrs by using reamer. If burrs are not removed, gas leakage may be caused. Turn the piping end down to avoid the metal powder entering the pipe.
  • Page 27: Outdoor Unit

    11.4 Outdoor Unit 11.4.1 Install the Outdoor Unit After selecting the best location, start installation according to indoor/outdoor unit installation diagram. Fix the unit on concrete or rigid frame firmly and horizontally by bolt nut (ø13/32"). When installing at roof, please consider strong wind and earthquake. Please fasten the installation stand firmly with bolt or nails.
  • Page 28: Evacuation Of The Equipment

    11.4.3 Evacuation of the equipment WHEN INSTALLING AN AIR CONDITIONER, BE SURE TO EVACUATE THE AIR INSIDE THE INDOOR UNIT AND PIPES in the following procedures. 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 29: Piping Insulation

    9. Secure the wire onto the control board with the holder (clamper). 10. After completing wiring connections, reattach the particular plate control board cover (metal and resin) and the original position with the screws. 11. For wire stripping and connection requirement, refer to instruction 11.3.7 of indoor unit. This equipment must be properly earthed.
  • Page 30: Operation Control

    12. Operation Control 12.1 Basic Function Inverter control, which equipped with a microcomputer in determining the most suitable operation mode as time passes, automatically adjusts output power for maximum comfort always. In order to achieve the suitable operation mode, the microcomputer maintains the set temperature by measuring the temperature of the environment and performing temperature shifting.
  • Page 31: Automatic Operation

    12.1.5 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 32: Outdoor Fan Motor Operation

    [Heating] According to indoor pipe temperature, automatic heating fan speed is determined as follows. Feedback control Immediately after the fan motor started, feedback control is performed once every second. During fan motor on, if fan motor feedback ≥ 2550 rpm or < 50 rpm continue for 10 seconds, then fan motor error counter increase, fan motor is then stop and restart.
  • Page 33: Quiet Operation (Cooling Mode/Cooling Area Of Dry Mode)

    Manual vertical airflow direction can be set using remote control; the angles of the vane are as stated above and the positions of the vane are as Figure 2 below. When the air conditioner is stopped using remote control, the vane will shift to close position.
  • Page 34: Quiet Operation (Heating)

    During quiet operation, if ON timer activates, quiet operation maintains. After off, when on back, quiet operation is not memorised. Control contents Auto fan speed is change from normal setting to quiet setting of respective fan speed. This is to reduce sound of Hi, Me, Lo for 3dB.
  • Page 35: Timer Control

    12.8 Timer Control 12.8.1 ON Timer Control ON Timer can be set using remote control, where the unit with timer set will start operation earlier than the setting time. This is to provide a comfortable environment when reaching the set ON time. 60 minutes before the set ON time, indoor (at fan speed of Lo-) and outdoor fan motor start operation for 30 seconds to determine the indoor intake air temperature and outdoor air temperature in order to judge the operation starting time.
  • Page 36: Protection Control

    13. Protection Control 13.1 Protection Control For All Operations 13.1.1 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. This control is not applicable if the power supply is cut off and on again.
  • Page 37: Protection Control For Cooling & Soft Dry Operation

    13.1.5 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 233.6°F, compressor will be stopped, occurs 4 times per 20 minutes, timer LED will be blinking. “F97” is indicated. 13.1.6 Low Pressure Protection Control (Gas Leakage Detection) For 5 minutes, the compressor continuously operates and outdoor total current is between 0.78A and 1.16A.
  • Page 38: Cooling Overload Control

    13.2.2 Cooling Overload Control Pipe temperature limitation / restriction. Detects the outdoor pipe temperature and carry out restriction / limitation below (Limit the compressor operation frequency) The compressor stops if outdoor pipe temperature exceeds 145.4°F. If the compressor stops 4 times in 20 minutes, Timer LED blinks (“F95” indicated: Outdoor high pressure rise protection) 13.2.3 Freeze Prevention Control 1...
  • Page 39 13.2.6.3 Overload Protection Control The compressor operating frequency is regulated in accordance to indoor heat exchanger temperature as shown below. If the heat exchanger temperature exceeds 140.0°F, compressor will stop. 13.2.6.4 Low Temperature Compressor Oil Return Control In heating operation, if the indoor temperature falls below 17.6°F when compressor starts, the compressor frequency will be regulated up to 600 seconds.
  • Page 40: Servicing Mode

    14. Servicing Mode 14.1 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 41: Remote Control Button

    Press Auto OFF/ON button to toggle remote control receiving sound. - Short “beep”: Turn OFF remote control receiving sound. - Long “beep”: Turn ON remote control receiving sound. After Auto OFF/ON button is pressed, the 20 seconds counter for Remote Control Receiving Sound OFF/ON Mode is restarted.
  • Page 42: Troubleshooting Guide

    15. Troubleshooting Guide 15.1 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 Temperature Such problems include insufficient insulation, problem with the (kg/cm (°F) power source, malfunction of a compressor and a fan.
  • Page 43 15.1.1 Relationship between the condition of the air conditioner and pressure and electric current Carry out the measurements of pressure, electric current, and temperature fifteen minutes after an operation is started.
  • Page 44: Breakdown Self Diagnosis Function

    15.2 Breakdown Self Diagnosis Function 15.2.1 Self Diagnosis Function (Three Digits Alphanumeric Code) Once error occurred during operation, the unit will stop its operation, and Timer LED blinks. Although Timer LED goes off when power supply is turned off, if the unit is operated under a breakdown condition, the LED will ON again.
  • Page 45: Error Code Table

    15.3 Error Code Table...
  • Page 46 Note: “○” – Frequency measured and fan speed fixed The memory data of error code is erased when the power supply is cut off, or press the Auto Switch until “beep” sound heard following by pressing the CHECK button at remote control. Although operation forced to stop when abnormality detected, emergency operation is possible for certain errors (refer to Error Code Table) by using remote control or Auto OFF/ON button at indoor unit.
  • Page 47: Self-Diagnosis Method

    15.4 Self-diagnosis Method 15.4.1 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. Faulty outdoor unit PCB.
  • Page 48 15.4.2 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. Faulty sensor.
  • Page 49 15.4.3 H16 (Outdoor Current Transformer Open Circuit) Malfunction Decision Conditions A current transformer (CT) is detected by checking the compressor running frequency (≥ rated frequency) and CT detected input current (less than 0.65A) for continuously 20 seconds. Malfunction Caused CT defective Outdoor PCB defective Compressor defective (low compression) Troubleshooting...
  • Page 50 15.4.4 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 Operation stops due to short circuit inside the fan motor winding.
  • Page 51 15.4.5 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. Faulty sensor. Faulty PCB.
  • Page 52 15.4.6 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. Faulty sensor. Faulty PCB.
  • Page 53 15.4.7 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. Faulty sensor. Faulty PCB.
  • Page 54 15.4.8 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. Faulty sensor. Faulty PCB.
  • Page 55 15.4.9 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. Troubleshooting...
  • Page 56 15.4.10 H98 (Indoor High Pressure Protection) Error Code will not display (no Timer LED blinking) but store in EEPROM Malfunction Decision Conditions During heating operation, the temperature detected by the indoor pipe temperature sensor is above 140.0°F. Malfunction Caused Clogged air filter of the indoor unit Dust accumulation on the indoor unit heat exchanger Air short circuit Detection error due to faulty indoor pipe temperature sensor...
  • Page 57 15.4.11 H99 (Indoor Freeze Prevention Protection: Cooling or Soft Dry) Malfunction Decision Conditions Freeze prevention control takes place (when indoor pipe temperature is lower than 35.6°F) Malfunction Caused Clogged air filter of the indoor unit Dust accumulation on the indoor unit heat exchanger Air short circuit Detection error due to faulty indoor pipe temperature sensor Detection error due to faulty indoor unit PCB...
  • Page 58 15.4.12 F11 (Indoor Pipe Temperature Sensor Abnormality) Malfunction Decision Conditions When cooling operation, when indoor pipe temperature or indoor heat exchanger temperature sensor is above 113.0°F. Malfunction Caused Faulty connector connection. Faulty indoor pipe temperature sensor. Faulty indoor main PCB. Troubleshooting...
  • Page 59 15.4.13 F90 (Power Factor Correction Protection) Malfunction Decision Conditions During startup and operation of cooling and heating, when Power Factor Correction (PFC) protection circuitry at the outdoor unit main PCB senses abnormal high DC voltage level. Malfunction Caused DC voltage peak due to power supply surge. DC voltage peak due to compressor windings not uniform.
  • Page 60 15.4.14 F91 (Refrigeration Cycle Abnormality) Malfunction Decision Conditions During cooling, compressor frequency = Fcmax. During cooling and heating operation, running current: 0.65A < I < 1.65A. During cooling, indoor intake - indoor pipe < 39.2°F. Malfunction Caused Refrigerant shortage (refrigerant leakage) Poor compression performance of compressor.
  • Page 61 15.4.15 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 Outdoor PCB malfunction Troubleshooting...
  • Page 62 15.4.16 F95 (Cooling High Pressure Abnormality) Malfunction Decision Conditions During operation of cooling, when outdoor unit heat exchanger high temperature data (141.8°F) is detected by the outdoor pipe temperature sensor. Malfunction Caused Outdoor pipe temperature rise due to short circuit of hot discharge air flow. Outdoor pipe temperature rise due to defective of outdoor fan motor.
  • Page 63 15.4.17 F96 (IPM Overheating) Malfunction Decision Conditions During operating of cooling and heating, when IPM temperature data (212.0°F) is detected by the IPM temperature sensor. Malfunction Caused IPM overheats due to short circuit of hot discharge air flow. IPM overheats due to defective of outdoor fan motor. IPM overheats due to defective of internal circuitry of IPM.
  • Page 64 15.4.18 F97 (Compressor Overheating) Malfunction Decision Conditions During operation of cooling and heating, when compressor tank temperature data (233.6°F) is detected by the compressor tank temperature sensor. Malfunction Caused Refrigerant shortage (refrigerant leakage). 2/3 way valve closed. Detection error due to faulty compressor tank temperature sensor. Troubleshooting...
  • Page 65 15.4.19 F98 (Input Over Current Detection) Malfunction Decision Conditions During cooling and heating operation, when an input over-current (16.8A) is detected by checking the input current value being detected by current transformer (CT) with the compressor running. Malfunction Caused Over-current due to compressor failure. Over-current due to defective outdoor unit PCB.
  • Page 66: Troubleshooting

    15.4.20 F99 (Output Over Current Detection) Malfunction Decision Conditions During operation of cooling and heating, when an output over-current (18.5A) is detected by checking the current that flows in the inverter DC peak sensing circuitry. Malfunction Caused DC peak due to compressor failure. DC peak due to defective power transistor(s).
  • Page 67: Disassembly And Assembly Instructions

    16. 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. 16.1 Indoor Electronic Controllers, Cross Flow Fan and Indoor Fan Motor Removal Procedures 16.1.1...
  • Page 68 16.1.1.2 To remove discharge grille...
  • Page 69 16.1.1.3 To remove control board 16.1.1.4 To remove cross flow fan and indoor fan motor...
  • Page 71: Technical Data

    17. Technical Data 17.1 Operation Characteristics 17.1.1 CS-E18NK CU-E18NK Cooling Characteristic Room temperature: 81°F (DBT), 66°F (WBT) Operation condition: High fan speed Piping length: 24.6ft Compressor Frequency : Fc 63.000 62.000 61.000 60.000 59.000 58.000 57.000 Outdoor Air Temperature (°F) 6.000 5.800 5.600...
  • Page 72 Piping Length Characteristic Cooling Room temperature: 81°F (DBT), 66°F (WBT) Operation condition: High fan speed Outdoor temperature: 95°F (DBT) Compressor Frequency : Fc 60.500 60.400 60.300 60.200 60.100 60.000 59.900 59.800 14 19 24 29 34 39 44 49 54 59 64 69 74 79 84 89 94 99 104 Piping Length (ft) 5.100 5.000...
  • Page 73 Heating Characteristic Room temperature: 68°F (DBT) Operation condition: High fan speed Piping length: 24.6ft Compressor Frequency : Fh 125.000 120.000 115.000 110.000 105.000 100.000 95.000 90.000 Outdoor Air Temperature (°F) 7.900 7.400 6.900 6.400 5.900 5.400 4.900 4.400 3.900 3.400 Outdoor Air Temperature (°F) 9.900 9.400...
  • Page 74 Piping Length Characteristic Heating Room temperature: 68°F (DBT) Operation condition: High fan speed Outdoor temperature: 47°F (DBT), 43°F (WBT) Compressor Frequency : Fh 101.000 100.000 99.000 98.000 97.000 96.000 95.000 94.000 93.000 92.000 14 19 24 29 34 39 44 49 54 59 64 69 74 79 84 89 94 99 104 Piping Length (ft) 6.200 6.000...
  • Page 75 17.1.2 CS-E24NK CU-E24NK Cooling Characteristic Room temperature: 81°F (DBT), 66°F (WBT) Operation condition: High fan speed Piping length: 24.6ft Compressor Frequency : Fc 56.000 55.000 54.000 53.000 52.000 51.000 50.000 Outdoor Air Temperature (°F) 7.800 7.300 6.800 6.300 5.800 5.300 Outdoor Air Temperature (°F) 12.600 12.100...
  • Page 76 Piping Length Characteristic Cooling Room temperature: 81°F (DBT), 66°F (WBT) Operation condition: High fan speed Outdoor temperature: 95°F (DBT) Compressor Frequency : Fc 55.400 55.200 55.000 54.800 54.600 54.400 54.200 54.000 53.800 53.600 14 19 24 29 34 39 44 49 54 59 64 69 74 79 84 89 94 99 104 Piping Length (ft) 7.200 7.150...
  • Page 77 Heating Characteristic Room temperature: 68°F (DBT) Operation condition: High fan speed Piping length: 24.6ft Compressor Frequency : Fh 138.000 133.000 128.000 123.000 118.000 113.000 108.000 103.000 98.000 93.000 Outdoor Air Temperature (°F) 10.400 9.400 8.400 7.400 6.400 5.400 4.400 Outdoor Air Temperature (°F) 15.000 14.500 14.000...
  • Page 78 Piping Length Characteristic Heating Room temperature: 68°F (DBT) Operation condition: High fan speed Outdoor temperature: 47°F (DBT), 43°F (WBT) Compressor Frequency : Fh 115.000 113.000 111.000 109.000 107.000 105.000 103.000 101.000 99.000 14 19 24 29 34 39 44 49 54 59 64 69 74 79 84 89 94 99 104 Piping Length (ft) 9.000 8.500...
  • Page 79: Exploded View And Replacement Parts List

    18. Exploded View and Replacement Parts List 18.1 Indoor 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 80 REF. NO. PART NAME & DESCRIPTION QTY. CS-E18NKUA CS-E24NKUA REMARK CHASSIS COMPLETE CWD50C1637 ← FAN MOTOR ARW7663AC ← CROSS FLOW FAN COMPLETE CWH02C1077 ← BEARING ASS’Y CWH64K007 ← SCREW - CROSS FLOW FAN CWH551146 ← EVAPORATOR CWB30C3963 CWB30C3967 FLARE NUT (LIQUID) CWT251030 ←...
  • Page 81: Outdoor Unit

    18.2 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 82 REF. NO. PART NAME & DESCRIPTION QTY. CU-E18NKUA CU-E24NKUA REMARK CHASSIS ASS’Y CWD52K1228A ← ANTI-VIBRATION BUSHING CWH50055 ← COMPRESSOR 5KD240XAF21 ← NUT-COMPRESSOR MOUNT CWH561049 ← FAN MOTOR BRACKET CWD541127 ← FAN MOTOR EHDS80CAC ← SCREW - FAN MOTOR BRACKET CWH551217 ←...

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