Panasonic CS-S12NKUW-1, CS-S18NKU-1, CS-S22NKU-1, CS-S9NKUW-1, CU-S12NKU-1, CU-S18NKU-1, CU-S22NKU-1, CU-S9NKU-1 14.4.21 F97 (Compressor Overheating)

14.4.21 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

Contents

Main TABLE OF CONTENTS 3 1. Safety Precautions The items to be followed are classified by the symbols: 4 2. Specification Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page 9. Printed Circuit Board 9.1 Indoor Unit 9.1.1 Main Printed Circuit Board Page Page 9.2.1.2 CU-S18NKU-1 CU-S22NKU-1 10. Installation Instruction 10.1 S9NKUW-1 S12NKUW-1 10.1.1 Select the Best Location 10.1.1.1 Indoor Unit 10.1.1.2 Outdoor Unit 10.1.2 Indoor/Outdoor Unit Installation Diagram Page 10.1.3.7 Connect the Cable to the Indoor Unit 10.1.3.8 Wire Stripping and connecting requirement 10.1.3.9 Cutting and flaring the piping 10.1.4 Outdoor Unit 10.1.4.1 Install the Outdoor Unit 10.1.4.2 Connect the Piping 10.1.4.2.1 Connecting the piping to indoor 10.1.4.2.2 Connecting the piping to outdoor 10.1.4.2.3 Connecting the piping to outdoor multi 10.1.4.2.4 Gas leak checking 10.1.4.3 Evacuation of the equipment 10.1.4.4 Connect the Cable to the Outdoor Unit 10.1.4.5 Piping Insulation 10.2 S18NKU-1 S22NKU-1 10.2.1 Select the Best Location 10.2.1.1 Indoor Unit 10.2.1.2 Outdoor Unit 10.2.2 Indoor/Outdoor Unit Installation Diagram 10.2.3 Indoor Unit 10.2.3.1 How to Fix Installation Plate Page 10.2.3.7 Connect the Cable to the Indoor Unit 10.2.3.8 Wire Stripping and connecting requirement 10.2.3.9 Cutting and flaring the piping 10.2.4 Outdoor Unit 10.2.4.1 Install the Outdoor Unit 10.2.4.2 Connect the Piping 10.2.4.2.1 Connecting the piping to indoor 10.2.4.2.2 Connecting the piping to outdoor 10.2.4.2.3 Gas leak checking 10.2.4.3 Evacuation of the equipment 10.2.4.4 Connect the Cable to the Outdoor Unit 10.2.4.5 Piping Insulation 11. Operation Control 11.1 Basic Function 11.1.1 Internal Setting Temperature 11.1.2 Cooling Operation 11.1.2.1 Thermostat control 11.1.3 Soft Dry Operation 11.1.3.1 Thermostat control 11.2 Indoor Fan Motor Operation 11.2.1 Basic Rotation Speed 11.3 Outdoor Fan Motor Operation (For S9NK and S12NK) 11.4 Outdoor Fan Motor Operation (For S18NK and S22NK) 11.5 Airflow Direction 11.6 Quiet Operation (Cooling Mode/Cooling Area of Dry Mode) 11.7 Powerful Mode Operation 11.8 Timer Control 11.8.1 ON Timer Control 11.8.2 OFF Timer Control 11.9 Random Auto Restart Control 11.10 Indication Panel 12. Protection Control 12.1 Restart Control (Time Delay Safety Control) 12.2 30 Seconds Forced Operation 12.3 Total Running Current Control 12.4 IPM (Power Transistor) Prevention Control 12.5 Compressor Overheating Prevention Control (For S18, S22NK only) 12.6 Low Pressure Protection Control (Gas Leakage Detection) 12.7 Low Frequency Protection Control 1 12.8 Low Frequency Protection Control 2 12.9 Outdoor Air Temperature Control 12.10 Cooling Overload Control 12.11 Freeze Prevention Control 12.12 Freeze Prevention Control 2 12.13 Dew Prevention Control 13. Servicing Mode 13.1 Auto Off/On Button 13.2 Remote Control Button 13.2.1 SET Button 13.2.2 RESET (RC) 13.2.3 RESET (AC) 13.2.4 TIMER 14. Troubleshooting Guide 14.1 Refrigeration Cycle System Page 14.2 Breakdown Self Diagnosis Function 14.2.1 Self Diagnosis Function (Three Digits Alphanumeric Code) 14.2.2 To Make a Diagnosis 14.2.3 To Display Memorized Error Code (Protective Operation) 14.2.4 To Clear Memorized Error Code after Repair (Protective Operation) 14.3 Error Code Table 14.4 Troubleshooting Flowchart 14.4.1 H11 (Indoor/Outdoor Abnormal Communication) 14.4.2 H12 (Indoor/Outdoor Capacity Rank Mismatched) 14.4.3 H14 (Indoor Intake Air Temperature Sensor Abnormality) 14.4.4 H15 (Compressor Temperature Sensor Abnormality) 14.4.5 H16 (Outdoor Current Transformer Open Circuit) 14.4.6 H19 (Indoor Fan Motor DC Motor Mechanism Locked) 14.4.7 H23 (Indoor Pipe Temperature Sensor Abnormality) 14.4.8 H27 (Outdoor Air Temperature Sensor Abnormality) 14.4.9 H28 (Outdoor Pipe Temperature Sensor Abnormality) 14.4.10 H30 (Compressor Discharge Temperature Sensor Abnormality) 14.4.11 H33 (Unspecified Voltage between Indoor and Outdoor) 14.4.12 H97 (Outdoor Fan Motor DC Motor Mechanism Locked) 14.4.13 H98 (Indoor High Pressure Protection) 14.4.14 H99 (Indoor Freeze Prevention Protection: Cooling or Soft Dry) 14.4.15 F11 (Indoor Pipe Temperature Sensor Abnormality) 14.4.16 F90 (Power Factor Correction Protection) 14.4.17 F91 (Refrigeration Cycle Abnormality) 14.4.18 F93 (Compressor Rotation Failure) 14.4.19 F95 (Cooling High Pressure Abnormality) 14.4.20 F96 (IPM Overheating) 14.4.21 F97 (Compressor Overheating) 14.4.22 F98 (Input Over Current Detection) 14.4.23 F99 (Output Over Current Detection) 15. Disassembly and Assembly Instructions 15.1 Indoor Electronic Controllers, Cross Flow Fan and Indoor Fan Motor Removal Procedures 15.1.1 To remove front grille 15.1.1.1 To remove power electronic controller Page Page Page 16. Technical Data 16.1 Operation Characteristics 16.1.1 CS-S9NKUW-1 CU-S9NKU-1 Page 16.1.2 CS-S12NKUW-1 CU-S12NKU-1 Page 16.1.3 CS-S18NKU-1 CU-S18NKU-1 Page 16.1.4 CS-S22NKU-1 CU-S22NKU-1 Page Page Page Page Page 17.2 Outdoor Unit

Panasonic 14.4.21 F97 (Compressor Overheating)

Models: CS-S12NKUW-1 CS-S18NKU-1 CS-S22NKU-1 CS-S9NKUW-1 CU-S12NKU-1 CU-S18NKU-1 CU-S22NKU-1 CU-S9NKU-1