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Panasonic CS-Z25UB4EAW

Panasonic CS-Z25UB4EAW
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© Panasonic Corporation 2018.
Order No: PAPAMY1801009CE
Indoor Unit Outdoor Unit
CS-Z25UB4EAW
CS-Z35UB4EAW
CS-Z50UB4EAW
CS-Z60UB4EAW
CU-Z25UBEA
CU-Z35UBEA
CU-Z50UBEA
CU-Z60UBEA
Destination
Europe
Turkey
Please file and use this manual together with the service manual for Model No. CU-2E12SBE, CU-2E15SBE, CU-2E18SBE,
CU-3E23SBE, CU-3E18PBE, CU-4E23PBE, CU-4E27PBE, CU-5E34PBE, CU-2Z35TBE, CU-2Z41TBE, CU-2Z50TBE,
CU-3Z52TBE, CU-3Z68TBE, CU-4Z68TBE, CU-4Z80TBE, CU-5Z90TBE, Order No. PAPAMY1601015CE, PAPAMY1301048CE,
PAPAMY1303046CE, PAPAMY1702035CE, PAPAMY1703049CE, PAPAMY1710082CE.
WARNING
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.
PRECAUTION OF LOW TEMPERATURE
In order to avoid frostbite, be assured of no refrigerant leakage during the installation or repairing of refrigerant circuit.
CAUTION
R32 REFRIGERANT
– This Air Conditioner contains and operates with refrigerant R32.
THIS PRODUCT MUST ONLY BE INSTALLED OR SERVICED BY QUALIFIED PERSONNEL.
Refer to Commonwealth, State, Territory and local legislation, regulations, codes, installation & operation manuals, before the
installation, maintenance and/or service of this product.
IMPORTANT SAFETY NOTICE
There are special components used in this equipment which are important for safety. These parts are marked by in the Schematic
Diagrams, Circuit Board Diagrams, Exploded Views and Replacement Parts List. It is essential that these critical parts should be replaced
with manufacturer’s specified
parts to prevent shock, fire or other hazards. Do not modify the original design without permission of
manufacturer.

Table of Contents

Questions and Answers:

Panasonic CS-Z25UB4EAW Specifications

General IconGeneral
BrandPanasonic
ModelCS-Z25UB4EAW
CategoryAir Conditioner
LanguageEnglish

Summary

Safety Precautions

Precaution for Using R32 Refrigerant

Service Personnel Qualifications

Qualifications and supervision requirements for handling refrigerants.

Work Procedures for Flammable Refrigerants

Safety checks and procedures for working with flammable refrigerants.

Refrigerant Leak Detection

Procedures for checking for flammable atmospheres and leak detection.

Fire Extinguisher Requirements

Requirement for having fire extinguishing equipment available.

Ignition Source Control

Avoiding ignition sources near refrigerant systems.

Ventilation Requirements

Ensuring adequate ventilation during work on refrigerant systems.

Equipment Checks

Checks for electrical components and equipment specifications.

Electrical Device Safety Checks

Initial safety checks for electrical components and wiring.

Sealed Component Repairs

Procedures for repairing sealed components, including electrical safety.

Intrinsically Safe Component Repair

Guidelines for repairing intrinsically safe components while live.

Cabling Checks

Checking cabling for wear, corrosion, or other environmental effects.

Flammable Refrigerant Detection

Methods for detecting flammable refrigerants and avoiding ignition sources.

Leak Detection Methods

Using electronic leak detectors and safety precautions.

Removal and Evacuation Procedures

Procedures for removing and evacuating refrigerant circuits.

Charging Procedures

Procedures for charging refrigerant systems, including safety.

Decommissioning Procedures

Procedures for safely decommissioning refrigeration equipment.

Labelling Requirements

Requirements for labelling de-commissioned equipment.

Refrigerant Recovery Procedures

Procedures for recovering refrigerant safely and correctly.

Specifications

Features

Location of Controls and Components

Indoor Unit Components

Identifies controls and components on the indoor unit.

Outdoor Unit Components

Identifies controls and components on the outdoor unit.

Remote Control Overview

Explains the functions of buttons and display on the remote control.

Dimensions

Indoor Unit Dimensions

Provides detailed dimensions and mounting information for the indoor unit.

Outdoor Unit Dimensions

Provides detailed dimensions and installation space for outdoor units.

Refrigeration Cycle Diagram

Diagram for Z25 Z35 Models

Illustrates the refrigeration cycle for specific indoor/outdoor unit combinations.

Diagram for Z50 Z60 Models

Illustrates the refrigeration cycle for other indoor/outdoor unit combinations.

Block Diagram

Block Diagram for Z25 Z35 Models

Shows the block diagram for specific indoor/outdoor unit combinations.

Block Diagram for Z50 Z60 Models

Shows the block diagram for other indoor/outdoor unit combinations.

Wiring Connection Diagram

Indoor Unit Wiring

Details the wiring connections for the indoor unit.

Outdoor Unit Wiring

Details wiring connections for outdoor units.

Electronic Circuit Diagram

Indoor Unit Circuit

Presents the electronic circuit diagram for the indoor unit.

Outdoor Unit Circuit

Presents the electronic circuit diagram for outdoor units.

Printed Circuit Board Layout

Indoor Unit PCBs

Shows the layout of the main and display printed circuit boards for the indoor unit.

Outdoor Unit PCBs

Shows the main printed circuit board layout for outdoor units.

Installation Instruction

Indoor Unit Installation

Instructions for installing the indoor unit, including required materials.

Indoor Unit Location Selection

Guidelines for selecting the optimal location for indoor unit installation.

Indoor Unit Installation Details

Details ceiling opening dimensions and refrigerant piping installation.

Refrigerant Piping Installation

Steps and precautions for brazing and connecting refrigerant piping.

Indoor Unit Drain Piping

Instructions for connecting and testing the indoor unit's drain piping.

Heat Insulation

Guidance on performing heat insulation for drain, liquid, and gas piping.

Indoor Unit Cable Connection

Instructions for connecting the power supply and communication cables.

Decorative Panel Installation

Steps for fitting the decorative panel onto the indoor unit.

Piping Connection

Procedures for connecting refrigerant piping to indoor and outdoor units.

Multi Unit Piping Connection

Connecting piping for multi-split outdoor unit combinations.

Outdoor Unit Installation

Instructions for installing the outdoor unit, including location selection.

Outdoor Unit Location Selection

Guidelines for selecting the optimal location for the outdoor unit.

Outdoor Unit Mounting

Steps for physically mounting and securing the outdoor unit.

Outdoor Unit Piping Connection

Procedures for connecting refrigerant piping to the outdoor unit.

Equipment Evacuation

Procedure for evacuating air from the system using a vacuum pump.

Outdoor Unit Cable Connection

Instructions for connecting power supply and inter-unit cables.

Outdoor Unit Pipe Insulation

Guidance on insulating piping to prevent water condensation.

Pipe Cutting and Flaring

Instructions for cutting and flaring copper pipes for refrigerant lines.

Outdoor Drain Water Disposal

Recommendations for disposing of drain water and using drain elbows.

Installation and Servicing with R32 Refrigerant

About R32 Refrigerant

Information on R32 refrigerant and its environmental impact.

R32 Refrigerant Characteristics

Chemical characteristics and properties of R32 refrigerant compared to others.

Refrigerant Piping Installation & Tools

Lists required tools and procedures for refrigerant piping.

Required Tools for Installation

Lists common tools required for R32 refrigerant piping installation and services.

Tools for R32 (Common with R410 A)

Details specific tools like flare gauges and flare tools for R32/R410A.

Tools Summary for Refrigerant Piping

A summary of tools used for refrigerant piping installations and services.

Refrigerant Cycle Procedures

Covers new installation, relocation, and repair of refrigerant cycle systems.

R32 Piping Installation

Details on R32 pipe materials, flaring, processing, and connection.

Pipe Materials and Flaring

Details on pipe materials, thickness regulations, and flaring procedures.

Pipe Processing and Connection

Steps and precautions for processing and connecting refrigerant pipes.

Installation, Relocation, and Service

Procedures for installing, relocating, and servicing air conditioners.

Air Purge and Gas Leak Test

Procedure for air purging and gas leak testing during new installation.

Refrigerant Recovery Process

Step-by-step process for recovering refrigerant using a recovery device.

Relocation Procedures

Steps for removing and reinstalling the air conditioning unit during relocation.

Brazing Procedures

Techniques and considerations for brazing refrigerant cycles.

Brazing Preparation

Requirements and procedures for preparing for refrigerant cycle brazing.

Vacuum Pump Pressure Adjustment

Adjusting vacuum pump pressure settings for proper operation.

Gas Provision Check

Steps to check gas provision for torches before brazing.

Flame Adjustment

Adjusting the flame type and mixture for brazing work.

Flame Types

Description of different flame types (Neutral, Carbide, Oxidizing).

Closing the Flame

Procedures for safely closing the torch flame.

Brazing Material Selection

Table and guidance on selecting appropriate brazing materials.

Flux Requirement

Importance and function of flux in brazing.

Nitrogen Gas Requirement

Importance of nitrogen gas flow during brazing to prevent oxidation.

Brazing Point Checks

Criteria for checking brazing points for quality and gap space.

Brazing and Heating

Methods for heating and applying brazing material correctly.

Brazing Terminologies

Definitions of terms related to brazing processes and defects.

Troubleshooting No Error Code

Method for diagnosing issues without error codes.

Diagnosis Preparation

Steps to prepare for diagnosing operational issues without error codes.

Refrigerant Cycle Verification

Explains the refrigerant cycle and how to verify its operation.

Refrigerant Cycle Diagnosis Guidance

Table guiding diagnosis based on pressure, current, and temperature readings.

Operation Control

Basic Operation Functions

Explains basic inverter control and microcomputer functions.

Internal Setting Temperature

Describes how internal setting temperature is determined and updated.

Cooling Operation Control

Details thermostat control for cooling operation.

Soft Dry Operation Control

Details thermostat control for soft dry operation.

Heating Operation Control

Details thermostat control for heating operation.

Automatic Operation Logic

Explains automatic operation mode decision logic.

Indoor Fan Motor Operation

Details fan motor operation and control.

Basic Rotation Speed (rpm)

Specifies manual and auto fan speeds in RPM for different modes.

Outdoor Fan Motor Operation

Details outdoor fan motor operation logic.

Airflow Direction Control

Controls airflow direction.

Vertical Airflow Settings

Details automatic and manual vertical airflow direction settings.

Quiet Operation Modes

Provides quiet operation modes for cooling.

Heating Quiet Operation

Provides quiet operation mode for heating.

Powerful Mode Operation

Enables powerful mode for quick temperature adjustment.

Timer Control

Manages ON and OFF timer settings.

ON Timer Control

Details how to set and use the ON timer function.

OFF Timer Control

Details how to set and use the OFF timer function.

Auto Restart Control

Automatic restart function after power interruption.

Indication Panel Overview

Explains the unit's indicator lights and panel.

Drain Pump Control

Details the operation of the built-in drain pump.

HA Terminal Interface

Describes the HA terminal for digital connection to external devices.

Multi Split Connection Operation

Cooling Operation Control

Details thermostat control for cooling in multi-split setups.

Soft Dry Operation Control

Details thermostat control for soft dry in multi-split setups.

Heating Operation Control

Details thermostat control for heating in multi-split setups.

Temperature Sampling Control

Explains temperature sampling control for multi-split units.

Protection Control

Protection Control for All Operations

Covers restart control and total running current protection.

Cooling & Soft Dry Operation Protection

Protection controls specific to cooling and soft dry modes.

Outdoor Air Temperature Control

Regulation of compressor frequency based on outdoor air temperature.

Cooling Overload Control

Detects outdoor pipe temperature to limit compressor operation frequency.

Freeze Prevention Control 1

Compressor stop condition if indoor heat exchanger temperature is too low.

Freeze Prevention Control 2

Conditions and actions for freeze prevention control.

Dew Prevention Control 1

Control to prevent dew formation at the indoor unit discharge area.

Odor Cut Control

Control to reduce odor released from the unit.

Heating Operation Protection

Protection controls specific to heating operations.

Intake Air Temperature Control

Compressor frequency regulation based on intake air temperature.

Outdoor Air Temperature Control

Regulation of max current value based on outdoor air temperature.

Overload Protection Control

Compressor frequency regulation based on indoor heat exchanger temperature.

Low Temp. Compressor Oil Return

Regulation of compressor frequency during low outdoor temperatures in heating.

Cold Draught Prevention

Cold draught operation initiated by low indoor pipe temperature.

Deice Operation

Deice operation starts when outdoor temperatures are low.

Low Pressure Protection

Protection control for low pressure conditions during heating.

Servicing Mode

Auto OFFON Button Functions

How to use the Auto OFF/ON button for operations and settings.

Heat Only Operation

Control of heating-only operation mode.

ActivateDeactivate Heat Only

Steps to activate and deactivate the "Heat Only" operation mode.

Remote Control Buttons

Details functions of remote control buttons.

SET Button Functions

Using the SET button for transmission codes and temperature limit settings.

RESET Functions

Restores remote control and unit settings to factory default.

TIMER Button Functions

Adjusts indicator LED intensity and display units.

Special Setting Mode

Instructions for entering and using special setting modes.

Function & Options List

Troubleshooting Guide

Refrigeration Cycle System Issues

Diagnosing malfunctions in the refrigeration cycle.

Breakdown Self Diagnosis

Functions for self-diagnosis of unit abnormalities.

Self Diagnosis Function

Using alphanumeric codes for self-diagnosis of abnormalities.

Making a Diagnosis

Steps to initiate and perform a diagnosis using the remote control.

Display Memorized Error Codes

How to view stored error codes and protective operation history.

Clear Memorized Error Codes

Procedure to clear memorized error codes after completing repairs.

Temporary Operation

Temporary operation of the unit during breakdown conditions.

Error Codes Table

Reference table of error codes and their causes.

Self-Diagnosis Method

Detailed troubleshooting steps for specific error codes.

H11: IndoorOutdoor Communication Error

Troubleshooting steps for H11 error (communication failure).

H12: Capacity Rank Mismatch

Troubleshooting steps for H12 error (capacity rank mismatch).

H14: Indoor Intake Air Sensor Error

Troubleshooting steps for H14 error (indoor intake air sensor abnormality).

H15: Compressor Temperature Sensor Error

Troubleshooting steps for H15 error (compressor temperature sensor abnormality).

H16: Outdoor Current Transformer Issue

Troubleshooting steps for H16 error (outdoor current transformer issue).

H19: Indoor Fan Motor Locked

Troubleshooting steps for H19 error (indoor fan motor locked).

H23: Indoor Pipe Temperature Sensor Error

Troubleshooting steps for H23 error (indoor pipe temperature sensor abnormality).

H24: Indoor Pipe Temp. Sensor 2 Error

Troubleshooting steps for H24 error (indoor pipe temperature sensor 2 abnormality).

H27: Outdoor Air Temperature Sensor Error

Troubleshooting steps for H27 error (outdoor air temperature sensor abnormality).

H28: Outdoor Pipe Temperature Sensor Error

Troubleshooting steps for H28 error (outdoor pipe temperature sensor abnormality).

H30: Compressor Discharge Temp. Sensor Error

Troubleshooting steps for H30 error (compressor discharge temperature sensor abnormality).

H32: Outdoor Heat Exchanger Temp. Sensor 2 Error

Troubleshooting steps for H32 error (outdoor heat exchanger sensor 2 abnormality).

H33: IndoorOutdoor Voltage Mismatch

Troubleshooting steps for H33 error (unspecified voltage between units).

H36: Outdoor Gas Pipe Sensor Error

Troubleshooting steps for H36 error (outdoor gas pipe sensor abnormality).

H37: Outdoor Liquid Pipe Sensor Error

Troubleshooting steps for H37 error (outdoor liquid pipe temperature sensor abnormality).

H97: Outdoor Fan Motor Locked

Troubleshooting steps for H97 error (outdoor fan motor locked).

H98: Indoor High Temp.No Alarm

Troubleshooting steps for H98 error (indoor high pressure/temp issue).

H99: Indoor Freeze Prevention

Troubleshooting steps for H99 error (indoor freeze prevention).

F11: 4-way Valve Switching Failure

Troubleshooting steps for F11 error (4-way valve switching failure).

F17: Indoor Standby Unit Freezing

Troubleshooting steps for F17 error (indoor standby unit freezing).

F90: Power Factor Correction Protection

Troubleshooting steps for F90 error (PFC protection).

F91: Refrigeration Cycle Abnormality

Troubleshooting steps for F91 error (refrigeration cycle abnormality).

F93: Compressor Rotation Failure

Troubleshooting steps for F93 error (compressor rotation failure).

F95: Outdoor High Pressure Protection

Troubleshooting steps for F95 error (outdoor high pressure protection).

F96: IPM Overheating

Troubleshooting steps for F96 error (IPM overheating).

F97: Compressor Overheating

Troubleshooting steps for F97 error (compressor overheating).

F98: Input Over Current Detection

Troubleshooting steps for F98 error (input over current detection).

F99: DC Peak Detection

Troubleshooting steps for F99 error (DC peak detection).

Disassembly and Assembly Instructions

Indoor Unit Parts Disassembly

Step-by-step guide for disassembling the indoor unit parts.

Outdoor Controller Removal

Technical Data

Cool Mode Performance Data

Performance data for the cooling mode under various conditions.

Heat Mode Performance Data

Performance data for the heating mode under various conditions.

Service Data

Cool Mode Air Temp. Characteristics

Characteristic curves for cooling mode based on outdoor air temperature.

Heat Mode Air Temp. Characteristics

Characteristic curves for heating mode based on outdoor air temperature.

Piping Length Correction Factor

Correction factors for cooling and heating capacity based on piping length.

Exploded View and Replacement Parts List

Indoor Unit Parts List

Exploded view and parts list for the indoor unit.

Front Grille Complete Parts

Exploded view and parts list for the CZ-BT20EW front grille.

Outdoor Unit Parts List

Exploded view and parts list for outdoor units.

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