Panasonic Indoor Unit Outdoor Unit CS-E9NKUAW CS-E12NKUAW CU-E9NKUA CU-E12NKUA service manual

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16. Troubleshooting Guide

16.1Refrigeration Cycle System

In order to diagnose malfunctions, make sure that there are no electrical problems before inspecting the refrigeration cycle. Such problems include insufficient insulation, problem with the power source, malfunction of a compressor and a fan.

The normal outlet air temperature and pressure of the refrigeration cycle depends on various conditions, the standard values for them are shown in the table on the right.

Normal Pressure and Outlet Air Temperature (Standard)

 

Gas Pressure

Outlet air

 

PSI

Temperature

 

(kg/cm2G)

(°F)

Cooling Mode

130.53

~ 174.04

53.6 ~ 60.8

(9 ~ 12)

 

 

Heating Mode

333.58

~ 420.60

96.8 ~ 113

(23

~ 29)

 

 

Condition: Indoor fan speed = High

Outdoor temperature 95°F at cooling mode and 44.6°F at heating mode.

Compressor operate at rated frequency

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Contents CS-E9NKUAW CU-E9NKUA CS-E12NKUAW CU-E12NKUA Exploded View and Replacement Parts List Safety Precautions Page CU-E9NKUA CU-E12NKUA ARI SpecificationType Propeller Fan Material Motor Type DC 8 poles DRY Bulb WET Bulb š Easy to use remote control š Quality Improvement FeaturesLocation of Controls and Components Indoor Unit Outdoor Unit Remote ControlIndoor Unit DimensionsOutdoor Unit Refrigeration Cycle Diagram Block Diagram Wiring Connection Diagram Outdoor Unit Electronic Circuit Diagram Outdoor Unit Main Printed Circuit Board Printed Circuit BoardPower Printed Circuit Board Indicator Printed Circuit Board Outdoor Unit Indoor Unit Installation InstructionIndoor/Outdoor Unit Installation Diagram Select the Best LocationTo Drill a Hole in the Wall and Install a Sleeve of Piping How to Fix Installation PlateIndoor Unit Installation Connect the Cable to the Indoor Unit Cutting and flaring the piping Wiring Stripping and connecting requirementConnect the Piping Install the Outdoor UnitEvacuation of the equipment Connecting the piping to outdoor multiConnect the Cable to the Outdoor Unit Basic Function Operation ControlBasic Rotation Speed rpm Indoor Fan Motor OperationAirflow Direction Outdoor Fan Motor OperationVertical Airflow Quiet Operation Heating Quiet Operation Cooling Mode/Cooling Area of Dry ModeHorizontal Airflow OFF Timer Control Powerful Mode OperationTimer Control On Timer ControlIndication Panel Heating Operation Operation Control For Multi Split ConnectionCooling operation Soft Dry OperationResidual Heat Removal Control Automatic OperationProtection Control For All Operations Protection ControlLow Pressure Prevention Control Gas Leakage Detection Outdoor Air Temperature ControlProtection Control For Cooling & Soft Dry Operation Compressor Overheating Prevention ControlProtection Control For Heating Operation Cooling Overload ControlFreeze Prevention Control Dew Prevention ControlOutdoor Air Temperature Control Auto Off/On Button Servicing ModeRemote Control Button Refrigeration Cycle System Troubleshooting GuidePage To Make a Diagnosis To Display Memorized Error Code Protective OperationBreakdown Self Diagnosis Function Self Diagnosis Function Three Digits Alphanumeric CodeError Code Table Page 16.4.1 H11 Indoor/Outdoor Abnormal Communication Self-diagnosis Method16.4.2 H12 Indoor/Outdoor Capacity Rank Mismatched 16.4.3 H14 Indoor Intake Air Temperature Sensor Abnormality 16.4.4 H15 Compressor Temperature Sensor Abnormality 16.4.5 H16 Outdoor Current Transformer Open Circuit 16.4.6 H19 Indoor Fan Motor DC Motor Mechanism Locked 16.4.7 H23 Indoor Pipe Temperature Sensor Abnormality 16.4.8 H27 Outdoor Air Temperature Sensor Abnormality 16.4.9 H28 Outdoor Pipe Temperature Sensor Abnormality Malfunction Decision Conditions Malfunction Decision Conditions 16.4.12 H33 Unspecified Voltage between Indoor and Outdoor 16.4.13 H36 Outdoor Gas Pipe Sensor Abnormality Malfunction Decision Conditions 16.4.15 H97 Outdoor Fan Motor DC Motor Mechanism Locked 16.4.16 H98 Indoor High Pressure Protection Malfunction Decision Conditions 16.4.18 F11 Indoor Pipe Temperature Sensor Abnormality Remark 16.4.19 F17 Indoor Standby Units Freezing Abnormality16.4.20 F90 Power Factor Correction Protection 16.4.21 F91 Refrigeration Cycle Abnormality 16.4.22 F93 Compressor Rotation Failure 16.4.23 F95 Cooling High Pressure Abnormality 16.4.24 F96 IPM Overheating 16.4.25 F97 Compressor Overheating 16.4.26 F98 Input Over Current Detection 16.4.27 F99 Output Over Current Detection To remove front grille Disassembly and Assembly InstructionsTo remove discharge grille Page Page Operation Characteristics Technical DataCS-E9NK CU-E9NK 139.500 139.000 Piping Length ft 600 Current 400 300 200 100 Page Page CS-E12NK CU-E12NK Page Page Page Exploded View and Replacement Parts List Chassis Complete Outdoor Unit Chassis Assy

Indoor Unit Outdoor Unit CS-E9NKUAW CS-E12NKUAW CU-E9NKUA CU-E12NKUA specifications

Panasonic has been a pioneer in the heating and cooling industry, and its range of air conditioners, particularly the CS-E9NKUAW and CS-E12NKUAW indoor units, paired with the CU-E9NKUA and CU-E12NKUA outdoor units, exemplify the brand's commitment to energy efficiency, advanced technologies, and user-friendly features.

These models deliver exceptional cooling and heating performance, making them suitable for various climates. One of the prominent features of these units is their Inverter technology, which ensures that the compressor can adjust its speed according to the desired temperature. This not only provides accurate temperature control but also results in lower energy consumption compared to non-inverter systems. Users can enjoy a consistent and comfortable indoor environment while keeping their electricity bills in check.

A key characteristic of the CS-E9NKUAW and CS-E12NKUAW units is their whisper-quiet operation. The low noise levels make them ideal for bedrooms, living rooms, or office spaces, providing comfort without disturbance. With a decorative design, these indoor units seamlessly blend into any interior, enhancing the aesthetic appeal of the space.

These Panasonic models are also equipped with advanced air purification systems. Utilizing a combination of nanoe™ technology, the air conditioners effectively reduce airborne bacteria, viruses, and allergens, ensuring cleaner and healthier indoor air quality. The air purification feature is complemented by a powerful filter system that captures dust and particulate matter, further enhancing the overall air quality.

The remote control feature allows users to operate the units with ease. With programmable timers and personalized settings, optimal comfort and convenience are just a click away. Additionally, the units are designed to be eco-friendly, adhering to strict environmental regulations and standards, thus promoting sustainability.

For installation, the outdoor units CU-E9NKUA and CU-E12NKUA are engineered to operate efficiently and quietly, accommodating various mounting options for flexible installation. The robust design enhances durability while minimizing maintenance needs, ensuring long-term reliability.

In summary, the Panasonic CS-E9NKUAW, CS-E12NKUAW indoor units, along with their CU-E9NKUA and CU-E12NKUA outdoor counterparts, embody a perfect blend of cutting-edge technology, user-centric features, and energy efficiency. They represent an excellent choice for consumers seeking comfort, convenience, and quality in their heating and cooling solutions.