Panasonic CU-XE12PKUA, CS-XE12PKUA, CS-XE9PKUA manual 15.4.21 F91 Refrigeration Cycle Abnormality

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15.4.21 F91 (Refrigeration Cycle Abnormality)

Malfunction Decision Conditions

šThe input current is low while the compressor is running at higher than the setting frequency.

Malfunction Caused

šLack of gas.

š3-way valve close.

Troubleshooting

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Contents CU-XE12PKUA Air ConditionerTable of Contents š The items to be followed are classified by the symbols Safety PrecautionsPage CU-XE9PKUA SpecificationsSeer / Hspf CS-XE9PKUA CU-XE9PKUA CS-XE12PKUA CU-XE12PKUA CS-XE12PKUA Pipe Diameter Liquid / Gas Mm inch š Inverter Technology FeaturesLocation of Controls and Components Indoor Unit Outdoor Unit Remote ControlIndoor Unit DimensionsOutdoor Unit Refrigeration Cycle Diagram Block Diagram Wiring Connection Diagram Model CU-XE9/12PK Connection Electronic Circuit Diagram Outdoor Unit Printed Circuit Board Main Printed Circuit Board Indicator Printed Circuit BoardPage Main Printed Circuit Board Indoor Unit Installation InstructionIndoor/Outdoor Unit Installation Diagram Select the Best LocationTo Drill a Hole in the Wall and Install a Sleeve of Piping Indoor Unit Installation Page Connect the Cable to the Indoor Unit Connect the Piping Install the Outdoor UnitConnect the Cable to the Outdoor Unit Evacuation of the EquipmentCutting and flaring the piping Piping InsulationBasic Function Operation ControlBasic Rotation Speed rpm Indoor Fan Motor OperationAutomatic Operation Fan OperationFeedback control Outdoor Fan Motor OperationVertical Airflow Airflow DirectionQuiet operation Cooling Mode/Cooling area of Dry Mode Quiet Operation HeatingHorizontal Airflow Indication Panel Powerful Mode OperationTimer Control Auto Restart ControlAuto Comfort and Econavi Operation Room Freeze Protection Function RFP OperationHuman Activity Sensor Information Log Rhythmic Temperature Wave Operation Econavi and Auto Comfort Demo Mode Human Activity Sensor Check Mode Protection Control For All Operations Restart Control Time Delay Safety ControlIPM Power transistor Prevention Control Protection ControlCompressor Overheating Prevention Control Low Pressure Prevention Control Gas Leakage DetectionLow Frequency Protection Control Freeze Prevention Control Outdoor Air Temperature ControlProtection Control For Cooling & Soft Dry Operation Cooling Overload ControlProtection Control For Heating Operation Auto OFF/ON Button Servicing ModeTimer Remote Control ButtonReset RC Reset ACRefrigeration Cycle System Troubleshooting GuideCondition Cooling Mode Heating Mode To Make a Diagnosis To Display Memorized Error Code Protective OperationBreakdown Self Diagnosis Function Self Diagnosis Function Three Digits Alphanumeric CodeProtection control Error Codes TableDiagnosis Abnormality Protection Problem 15.4.1 H11 Indoor/Outdoor Abnormal Communication Self-diagnosis Method15.4.2 H12 Indoor/Outdoor Capacity Rank Mismatched 15.4.3 H14 Indoor Intake Air Temperature Sensor Abnormality 15.4.4 H15 Compressor Temperature Sensor Abnormality 15.4.5 H16 Outdoor Current Transformer 15.4.6 H19 Indoor Fan Motor DC Motor Mechanism Locked 15.4.7 H23 / H24 Indoor Pipe Temperature Sensor Abnormality 15.4.8 H27 Outdoor Air Temperature Sensor Abnormality 15.4.9 H28 Outdoor Pipe Temperature Sensor Abnormality Malfunction Decision Conditions Malfunction Decision Conditions 15.4.12 H33 Unspecified Voltage between Indoor and Outdoor 15.4.13 H36 Outdoor Gas Pipe Sensor Abnormality Malfunction Decision Conditions 15.4.15 H97 Outdoor Fan Motor DC Motor Mechanism Locked Malfunction Decision Conditions Malfunction Caused 15.4.18 F11 4-way Valve Switching Failure Remark 15.4.19 F17 Indoor Standby Units Freezing Abnormality15.4.20 F90 Power Factor Correction Protection 15.4.21 F91 Refrigeration Cycle Abnormality 15.4.22 F93 Compressor Rotation Failure Malfunction Decision Conditions Multi Models only 15.4.24 F96 IPM Overheating15.4.25 F97 Compressor Overheating 15.4.26 F98 Input Over Current Detection 15.4.27 F99 DC Peak Detection To remove front grille To remove electronic controller Disassembly and Assembly InstructionsTo remove discharge grille Page Page Page Outdoor Electronic Controller Removal Procedure Operation Characteristics Technical DataPage Page Page CS-XE12PKUA CU-XE12PKUA Page Page Page š CU-XE9PKUA Sensible Capacity ChartCS-XE9PKUA CS-XE12PKUA Exploded View and Replacement Parts ListRemark BAG Outdoor Unit 101 Shock Absorber Right

CU-XE12PKUA, CU-XE9PKUA, CS-XE9PKUA, CS-XE12PKUA specifications

The Panasonic CU-XE9PKUA, CU-XE12PKUA, CS-XE12PKUA, and CS-XE9PKUA are part of Panasonic's advanced lineup of air conditioning units, designed to deliver reliable comfort and energy efficiency in residential and commercial settings. These models are engineered with cutting-edge technology to ensure optimal performance, sustainability, and user convenience.

One of the standout features of these air conditioning units is their high energy efficiency ratings. Equipped with inverter technology, they adjust the compressor’s speed according to the temperature, maintaining the desired comfort level without unnecessary energy consumption. This not only reduces electricity bills but also ensures a smaller carbon footprint, making them an eco-friendly choice.

The CU-XE9PKUA and CU-XE12PKUA units are outdoor models, which seamlessly pair with their indoor counterparts, the CS-XE9PKUA and CS-XE12PKUA, respectively. This split system design provides versatile installation options while ensuring quiet operation. The outdoor units are built to withstand a variety of weather conditions, contributing to their durability and longevity.

In addition to their robust energy efficiency, these units feature advanced cooling and heating capabilities. With the inclusion of Panasonic’s unique “nanoe-G” technology, these models not only cool or heat the air but also purify it. Nanoe-G technology releases hydroxyl radicals that effectively eliminate harmful particles, such as bacteria and allergens, ensuring that the air you breathe is cleaner and healthier.

The design of the indoor units is sleek and modern, integrating easily into any décor. With features like quiet operation, they are perfect for bedrooms and quiet spaces, ensuring that the comfort of climate control does not come at the expense of serenity.

User convenience is further enhanced with smart control options. Many of the models come equipped with Wi-Fi connectivity, allowing users to control their air conditioning systems remotely via a smartphone app. This means adjusting temperature settings, scheduling operations, or activating modes can be done effortlessly, ensuring maximum comfort at all times.

Overall, Panasonic's CU-XE9PKUA, CU-XE12PKUA, CS-XE12PKUA, and CS-XE9PKUA models combine innovative technology, energy efficiency, and user-friendly features, making them excellent choices for anyone seeking reliable climate control solutions. Whether for residential use or commercial applications, these air conditioners promise to deliver comfort, quality, and peace of mind.