Table of Contents
Advertisement
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. Location of Controls and Components ...........7
3.1
Indoor Unit....................................................7
3.2
Outdoor Unit .................................................7
3.3
Remote Control ............................................7
4. Dimensions .........................................................8
4.1
Indoor Unit....................................................8
4.2
Outdoor Unit .................................................9
5. Refrigeration Cycle Diagram...........................10
6. Block Diagram ..................................................11
7. Wiring Connection Diagram............................12
7.1
Indoor Unit..................................................12
7.2
Outdoor Unit ...............................................13
8. Electronic Circuit Diagram ..............................14
8.1
Indoor Unit..................................................14
8.2
Outdoor Unit ...............................................15
WARNING
PRECAUTION OF LOW TEMPERATURE
9. Printed Circuit Board .......................................16
10. Installation Instruction.....................................19
11. Operation Control.............................................27
12. Protection Control............................................32
Indoor Unit
CS-S18NKUA
CS-S24NKUA
9.1
Indoor Unit..................................................16
9.2
Outdoor Unit ...............................................18
11.1
Basic Function............................................27
11.2
Indoor Fan Motor Operation.......................28
11.3
Outdoor Fan Motor Operation ....................28
11.4
Airflow Direction .........................................28
of Dry Mode)...............................................29
11.6
Powerful Mode Operation ..........................30
11.7
Timer Control..............................................30
11.8
Random Auto Restart Control ....................30
11.9
Indication Panel..........................................31
12.1
....................................................................32
12.2
30 Seconds Forced Operation ...................32
12.3
Total Running Current Control ...................32
© Panasonic Appliances Air-Conditioning Malaysia
Sdn. Bhd. 2012. Unauthorized copying and distribution
is a violation of law.
Order No: PAPAMY1204086CE
Outdoor Unit
CU-S18NKUA
CU-S24NKUA
Advertisement
Table of Contents
Troubleshooting
Related Manuals for Panasonic CS-S18NKUA
Summary of Contents for Panasonic CS-S18NKUA
-
Page 1: Table Of Contents
8. Electronic Circuit Diagram ......14 ..............32 Indoor Unit..........14 12.2 30 Seconds Forced Operation ....32 Outdoor Unit ..........15 12.3 Total Running Current Control ....32 © Panasonic Appliances Air-Conditioning Malaysia Sdn. Bhd. 2012. Unauthorized copying and distribution is a violation of law. - Page 2 12.4 IPM (Power Transistor) Prevention Control ...............32 12.5 Compressor Overheating Prevention Control ..............33 12.6 Low Pressure Protection Control (Gas Leakage Detection) ........33 12.7 Low Frequency Protection Control 1 ..33 12.8 Low Frequency Protection Control 2 ..33 12.9 Outdoor Air Temperature Control....33 12.10 Cooling Overload Control ......34 12.11 Freeze Prevention Control ......34 12.12 Freeze Prevention Control 2 ......34...
-
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 WARNING 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.).
-
Page 5: Specification
2. Specification Indoor CS-S18NKUA CS-S24NKUA Model Outdoor CU-S18NKUA CU-S24NKUA Performance Test Condition AHRI AHRI 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... - Page 6 Indoor CS-S18NKUA CS-S24NKUA Model Outdoor CU-S18NKUA CU-S24NKUA Control Device Expansion Valve Expansion Valve Refrigeration Refrigerant Oil FV50S (800) FV50S (800) Cycle Refrigerant Type g (oz) R410A, 1.60k (56.5) R410A, 1.85k (65.3) Height(I/D / O/D) mm (inch) 290 (11-7/16) / 795 (31-5/16)
-
Page 7: Location Of Controls And Components
3. Location of Controls and Components Indoor Unit Outdoor Unit Remote Control... -
Page 8: Dimensions
4. Dimensions Indoor Unit... -
Page 9: Outdoor Unit
Outdoor Unit... -
Page 10: Refrigeration Cycle Diagram
5. Refrigeration Cycle Diagram... -
Page 11: Block Diagram
6. Block Diagram... -
Page 12: Wiring Connection Diagram
7. Wiring Connection Diagram Indoor Unit... -
Page 13: Outdoor Unit
Outdoor Unit... -
Page 14: Electronic Circuit Diagram
8. Electronic Circuit Diagram Indoor Unit... -
Page 15: Outdoor Unit
Outdoor Unit... -
Page 16: Printed Circuit Board
9. Printed Circuit Board Indoor Unit 9.1.1 Main Printed Circuit Board... - Page 17 9.1.2 Power Printed Circuit Board 9.1.3 Indicator Printed Circuit Board...
-
Page 18: Outdoor Unit
Outdoor Unit 9.2.1 Main Printed Circuit Board... -
Page 19: Installation Instruction
10. Installation Instruction • IMPORTANT (only for S18NKUA) This product has been designed and manufactured to meet ENERGY STAR® criteria for energy efficiency when matched with appropriate coil components. However, proper refrigerant charge and proper air flow are critical to archive rated capacity and efficiency. -
Page 20: How To Fix Installation Plate
10.1.3 Indoor Unit 10.1.3.1 How to Fix Installation Plate The mounting wall must be strong and solid enough to prevent if from the vibration. Dimension Model ○ ○ ○ ○ ○ ○ S18NKUA, S24NKUA 23 1/32” 3 7/32” 6 1/2” 6 7/32”... - Page 21 10.1.3.3 Indoor Unit Installation 10.1.3.4 For the right rear piping 10.1.3.5 For the right bottom piping 10.1.3.6 For the embedded piping (This can be used for left rear piping and bottom piping also.)
- Page 22 10.1.3.7 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 23 10.1.3.8 Wire Stripping and connecting requirement 10.1.3.9 Cutting and flaring the piping Please cut using pipe cutter and then remove the burrs. Remove the burrs by using reamer. If burrs is not removed, gas leakage may be caused. Turn the piping end down to avoid the metal powder entering the pipe.
-
Page 24: Install The Outdoor Unit
10.1.4 Outdoor Unit 10.1.4.1 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 (ø13/32”). When installing at roof, please consider strong wind and earthquake. Please fasten the installation stand firmly with bolt or nails. - Page 25 10.1.4.3 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 2.
- Page 26 9. Secure the wire onto the control board with the holder (clamper). 10. After completing wiring connections, reattach the particular plate and control board cover (Metal and Resin) to the original position with the screws. 11. For wire stripping and connection requirement, refer to instruction of indoor unit.
-
Page 27: Operation Control
11. Operation Control 11.1 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 28: Indoor Fan Motor Operation
11.2 Indoor Fan Motor Operation 11.2.1 Basic Rotation Speed • Manual Fan Speed Fan motor’s number of rotation is determined according to remote control setting. Remote control ○ ○ ○ ○ ○ • Auto Fan Speed According to room temperature and setting temperature, indoor fan speed is determined automatically. The indoor fan will operate according to pattern below. -
Page 29: Quiet Operation (Cooling Mode/Cooling Area Of Dry Mode)
11.4.1 Vertical Airflow Vane Angle (°) Operation Mode Airflow Direction Auto 20 ~ 45 Cooling Manual Auto 20 ~ 45 Soft Dry Manual • Automatic vertical airflow direction can be set using remote control; the vane swings up and down within the angles as stated above. -
Page 30: Powerful Mode Operation
During quiet operation, if ON timer activates, quiet operation maintains. After off, when on back, quiet operation is not memorized. • Control content Fan speed is changed from normal setting to quiet setting of respective fan speed. This is to reduce sound of Hi, Me, Lo for 3dB (more than 3dB for some models). -
Page 31: Indication Panel
11.9 Indication Panel POWER TIMER QUIET POWERFUL Color Green Orange Orange Orange Light ON Operation ON Timer Setting ON Quiet Mode ON Powerful Mode ON Light OFF Operation OFF Timer Setting OFF Quiet Mode OFF Powerful Mode OFF Note: • If POWER LED blinks, the possible operation of the unit is operation mode judgment, or ON timer sampling. -
Page 32: Protection Control
12. Protection Control 12.1 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 33: Compressor Overheating Prevention Control
12.5 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. -
Page 34: Cooling Overload Control
12.10 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) 12.11 Freeze Prevention Control •... -
Page 35: Servicing Mode
13. Servicing Mode 13.1 Auto Off/On Button Auto OFF/ON Auto OFF/ON Button Pressed Button Pressed 5 sec Auto Operation Test Run Operation Stop (Forced Cooling Operation) 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. -
Page 36: Remote Control Button
13.2 Remote Control Button 13.2.1 SET Button • To check remote control transmission code and store the transmission code to EEPROM Press “Set” button continuously for 10 seconds by using pointer Press “Timer Set” button unit a “beep” sound is heard as confirmation of transmission code change. 13.2.2 RESET (RC) •... -
Page 37: Troubleshooting Guide
14. Troubleshooting Guide 14.1 Refrigeration Cycle System In order to diagnose malfunctions, ensure the air conditioner is free Normal Pressure and Outlet Air Temperature (Standard) from 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 38 14.1.1 Relationship between the condition of the air conditioner and pressure and electric current Cooling Mode Condition of the air conditioner 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 39: Breakdown Self Diagnosis Function
14.2 Breakdown Self Diagnosis Function 14.2.1 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 40: Error Code Table
14.3 Error Code Table Diagnosis Emergency Abnormality / Protection control Abnormality Judgment Primary location to verify display Operation No abnormality detected Normal operation • Internal / external cable connection Indoor / Outdoor abnormal > 1 min after starting Indoor fan operation communication operation only... -
Page 41: Troubleshooting Flowchart
14.4 Troubleshooting Flowchart 14.4.1 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 42 14.4.2 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. •...
- Page 43 14.4.3 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 1.14A) for continuously 20 seconds. Malfunction Caused •...
- Page 44 14.4.4 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 •...
- Page 45 14.4.5 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. •...
- Page 46 14.4.6 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. •...
- Page 47 14.4.7 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. •...
- Page 48 14.4.8 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. •...
- Page 49 14.4.9 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.
- Page 50 14.4.10 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°F. Malfunction Caused •...
- Page 51 14.4.11 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 •...
- Page 52 14.4.12 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°F. Malfunction Caused • Faulty connector connection. • Faulty indoor pipe temperature sensor. • Faulty indoor main PCB.
- Page 53 14.4.13 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.
- Page 54 14.4.14 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 •...
- Page 55 14.4.15 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 56 14.4.16 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. •...
- Page 57 14.4.17 F96 (IPM Overheating) Malfunction Decision Conditions During operating of cooling and heating, when IPM temperature data (212°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.
- Page 58 14.4.18 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.
- Page 59 14.4.19 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.
-
Page 60: Troubleshooting
14.4.20 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. •... -
Page 61: Disassembly And Assembly Instructions
15. 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. 15.1 Indoor Electronic Controllers, Cross Flow Fan and Indoor Fan Motor Removal Procedures 15.1.1... - Page 62 15.1.1.2 To remove discharge grille...
- Page 63 15.1.1.3 To remove control board 15.1.1.4 To remove cross flow fan and indoor fan motor...
-
Page 65: Technical Data
16. Technical Data 16.1 Operation Characteristics 16.1.1 CS-S18NKUA CU-S18NKUA • Cooling Characteristic Room temperature: 81°F (DBT), 66°F (WBT) Operation condition: High fan speed Piping length: 24.6ft Compressor Freq:... - Page 66 • Piping Length Characteristic Room temperature: 81°F (DBT), 66°F (WBT) Operation condition: High fan speed Outdoor temperature: 95°F (DBT) Compressor Freq:...
- Page 67 16.1.2 CS-S24NKUA CU-S24NKUA • Cooling Characteristic Room temperature: 81°F (DBT), 66°F (WBT) Operation condition: High fan speed Piping length: 24.6ft Compressor Freq:...
- Page 68 • Piping Length Characteristic Room temperature: 81°F (DBT), 66°F (WBT) Operation condition: High fan speed Outdoor temperature: 95°F (DBT) Compressor Freq:...
-
Page 69: Exploded View And Replacement Parts List
17. Exploded View and Replacement Parts List 17.1 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 70 REF. NO. PART NAME & DESCRIPTION QTY. CS-S18NKUA CS-S24NKUA REMARK CHASSIS COMPLETE CWD50C1637 ← FAN MOTOR ARW7663AC ← CROSS-FLOW FAN COMPLETE CWH02C1077 ← BEARING ASSY CWH64K007 ← SCREW - CROSS-FLOW FAN CWH551146 ← EVAPORATOR CWB30C3963 CWB30C3967 FLARE NUT (LIQUID) CWT251030 ←...
-
Page 71: Outdoor Unit
17.2 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 72 REF. NO. PART NAME & DESCRIPTION QTY. CU-S18NKUA CU-S24NKUA REMARK CHASSIS COMPLETE CWD52K1229A ← ANTI - VIBRATION BUSHING CWH50055 ← COMPRESSOR 5KD240XAF21 ← NUT - COMPRESSOR MOUNT CWH561049 ← FAN MOTOR BRACKET CWD541127 ← FAN MOTOR EHDS80CAC ← SCREW - FAN MOTOR BRACKET CWH551217 ←...