Daikin RN25CVMB7 - User Manual

SiENBE04-512A
Service
Manual
Inverter Pair
Wall Mounted Type
C-Series - D-Series
SiENBE04-512A.book Page 1 Friday, October 5, 2007 1:49 PM

Summary

Introduction and Safety

Safety Cautions

Important safety cautions to be observed before and during repair work.

Repair Safety Precautions

Detailed warnings and precautions to be taken during repair work to prevent electrical shock.

Product Safety After Repair

Safety guidelines to follow after completing repair work on the air conditioner.

Post-Repair Inspection

Procedures for inspecting the unit after repair to ensure proper operation and safety.

Understanding Document Icons

Explains the meaning and usage of icons found in the manual.

List of Functions by Model

Function Overview

Provides a comprehensive list of all functions available for the air conditioner models.

High Grade Model Functions

Details the functions and specifications for high-grade models of the air conditioner.

Standard Grade Model Functions

Details the functions and specifications for standard-grade models of the air conditioner.

Non-Inverter Model Functions

Details the functions and specifications for non-inverter models of the air conditioner.

Air Conditioner Specifications

Cooling Only Specifications

Detailed specifications for the cooling-only operation mode of the air conditioner.

Cooling Only: High Grade Models

Technical specifications for high-grade models in cooling-only mode.

Cooling Only: Standard Grade Models

Technical specifications for standard-grade models in cooling-only mode.

Heat Pump Specifications

Detailed specifications for the heat pump operation mode of the air conditioner.

Heat Pump: High Grade Models

Technical specifications for high-grade models in heat pump mode.

Cooling Only: Non-Inverter Models

Technical specifications for non-inverter models in cooling-only mode.

Wiring and PCB Diagrams

Indoor Unit PCB Wiring

Wiring diagram and connector identification for the indoor unit's circuit boards.

Outdoor Unit ARK(X)S-C Wiring

Wiring diagram and connector identification for outdoor unit ARK(X)S-C models.

Outdoor Unit RK(X)H-C Wiring

Wiring diagram and connector identification for outdoor units RK(X)H-C, ARK(X)H-C, R(Y)N-C.

Air Conditioner Functions and Controls

Main Unit Functions Overview

Details the primary functions and operational modes of the air conditioner.

Inverter Frequency Control Principle

Explains the inverter's frequency control principle for regulating compressor speed and capacity.

Airflow Control Features

Describes the functions of dual flaps, louvers, and auto-swing for air direction control.

Indoor Fan Speed Control

Details how fan speed is controlled for indoor units based on temperature differences.

Programme Dry Function

Explains the dry function for humidity removal while maintaining room temperature.

Automatic Operation Mode

How the unit automatically selects cooling or heating based on room and set temperatures.

NIGHT SET Mode for Comfort

Function for adjusting temperature settings for economical and comfortable sleeping.

INTELLIGENT EYE Energy Saving

Detects human presence using a sensor to reduce capacity and save energy.

HOME LEAVE Operation Convenience

Allows users to record and recall preferred temperature and airflow settings for automatic operation.

Inverter POWERFUL Operation

Maximizes cooling/heating effect by increasing fan speed and compressor frequency for 20 mins.

Other Unit Functions

Covers various other functions like hot start, signal receiving, ON/OFF button, etc.

Thermistor Functions and Control

Heat Pump Thermistor Roles

Details the function of thermistors in heat pump models for temperature control.

Cooling Only Thermistor Roles

Details the function of thermistors in cooling-only models for temperature control.

System Control Specifications

Mode Hierarchy and Transitions

Describes the hierarchy of operating modes for heat pump and cooling-only models.

Frequency Control Logic

Explains how frequency is controlled based on room and set temperatures.

Mode Change and Start-up Controls

Details controls related to mode changes and start-up sequences.

Four Way Valve Operations

Explains switching and compensation for the four-way valve.

Compressor Protection and Standby

Covers compressor protection and the 3-minute standby feature.

Discharge Pipe and Input Current Control

Controls based on discharge pipe and input current for operation management.

Freeze-up Protection Control

Prevents indoor heat exchanger freezing by limiting operating frequency.

Heating Peak-cut and Fan Control

Manages heating peak loads and fan operations based on priority.

Liquid Compression and Defrost Control

Protection against liquid compression and defrosting cycle management.

Electronic Expansion Valve Control

Explains the control logic for the electronic expansion valve.

Frequency Change and Target Temperature Control

Adjusts expansion valve based on frequency changes and target discharge pipe temperature.

Malfunctions and Gas Control

Lists malfunctions, sensor errors, and methods for detecting insufficient gas.

Forced Operation and Additional Functions

Covers forced operation, powerful mode, and voltage detection functions.

Low Temperature Cooling Jumper Setting

Allows expanding operation range to -15°C by cutting a jumper.

System Configuration and Operation

System Configuration Overview

Provides an overview of the air conditioner system configuration.

Operating Instructions

Instructions for operating and handling the air conditioner unit.

Safety Precautions for Operation

Essential safety precautions to be read and followed before operating the unit.

Unit Parts Identification

Identifies and labels the main parts of the indoor and outdoor units.

Pre-Operation Setup

Steps required to prepare the unit and remote control before initial operation.

Selecting Operating Modes

Describes how to select and operate the different modes: AUTO, DRY, COOL, HEAT, FAN.

Adjusting Airflow Direction

Instructions on how to adjust the horizontal and vertical airflow direction for comfort.

POWERFUL Operation Mode

Maximizes cooling/heating effect by increasing fan speed and compressor frequency for 20 mins.

Outdoor Unit Silent Operation

Lowers outdoor unit noise by adjusting fan speed and frequency, convenient for night use.

HOME LEAVE Operation

Allows users to record and recall preferred temperature and airflow settings for automatic operation.

INTELLIGENT EYE Operation

Detects human presence using a sensor to reduce capacity and save energy.

Timer Operation Modes

Instructions for setting ON and OFF timers for automatic operation.

Unit Care and Cleaning Procedures

Procedures for cleaning the indoor, outdoor units, and remote control.

Troubleshooting Common Issues

Lists common issues and their potential causes and solutions.

Immediate Service Call Guidance

Advises when to stop operation and contact a service shop for immediate attention.

Service Diagnosis Procedures

Diagnostic Cautions

Important cautions to be observed before performing diagnostic procedures.

Symptom-Based Troubleshooting

Lists common symptoms and provides corresponding checks and measures for diagnosis.

Service Check Function via Remote

Explains how to use the remote control for service check and error code diagnosis.

Troubleshooting Specific Faults

Error Codes and Descriptions

Lists all error codes displayed by the system and their descriptions.

Indoor Unit PCB Faults

Procedure for diagnosing and resolving abnormalities in the indoor unit's PCB.

Freeze-up or High Pressure Faults

Troubleshooting steps for freeze-up protection or high-pressure control issues.

Fan Motor or Related Faults

Diagnosing and resolving issues related to the fan motor or its associated components.

Indoor Thermistor Faults

Troubleshooting steps for indoor unit thermistor or related abnormalities.

Indoor-Outdoor Signal Transmission Errors

Steps to diagnose and resolve signal transmission errors between indoor and outdoor units.

Compressor Overload (OL Activation)

Troubleshooting procedure for compressor overload (OL activation) issues.

Compressor Lock Diagnosis

Steps to diagnose and resolve compressor lock conditions.

DC Fan Lock Errors

Troubleshooting steps for DC fan lock errors.

Input Over Current Detection

Procedure for detecting and resolving input over current issues.

Four Way Valve Abnormalities

Diagnosing and resolving abnormalities related to the four-way valve.

Discharge Pipe Temperature Control Issues

Troubleshooting steps for discharge pipe temperature control related faults.

High Pressure Control in Cooling Faults

Diagnosing and resolving high pressure control issues during cooling operation.

Position Sensor Abnormalities

Troubleshooting steps for position sensor abnormalities.

DC Voltage;Current Sensor Abnormalities

Diagnosing abnormalities in DC voltage or current sensors.

Outdoor Thermistor Abnormalities

Troubleshooting for outdoor unit thermistor or related abnormalities.

Electrical Box Temperature Rise Issues

Diagnosing issues related to temperature rise in the electrical box.

Radiation Fin Temperature Rise Issues

Troubleshooting steps for radiation fin temperature rise.

Output Over Current Detection

Procedure for detecting and resolving output over current issues.

Insufficient Gas Detection and Control

Methods for detecting and controlling insufficient gas conditions.

Over-voltage Detection Issues

Diagnosing and resolving over-voltage detection issues.

Component Checks and Procedures

Check Electronic Expansion Valve

Procedure for checking the electronic expansion valve's functionality and conductivity.

Check Four Way Valve Performance

Steps to check the performance and continuity of the four-way valve.

Check Thermistor Resistance

How to measure thermistor resistance and check against normal values.

Installation Condition Checks

Checks related to installation conditions that might affect performance.

Discharge Pressure Check Procedure

Procedure for checking the discharge pressure of the system.

Outdoor Unit Fan System Checks

Diagnostic steps for checking the outdoor unit's fan and its system.

Power Supply Waveform Checks

How to check power supply waveforms for disturbances.

Refrigerant System Checks

Checks for refrigerant leaks, moisture, and gas shortage.

Power Transistor Checks

Procedure for checking the power transistor's resistance and voltage.

Outdoor PCB Speed Pulse Input Check

Checks the speed pulse input from the fan motor to the outdoor unit PCB.

Hall IC Check Procedure

Verifies the Hall IC connection and output voltage for fan motor operation.

Component Removal Procedures

Indoor Unit Component Removal

Step-by-step guide for removing components of the indoor unit.

Indoor Unit Air Filter Removal

Procedure for removing and cleaning the air filter from the indoor unit.

Indoor Unit Front Grille Removal

Procedure for removing the front grille assembly of the indoor unit.

Indoor Unit Blade Removal

Step-by-step guide for removing the horizontal and vertical blades from the indoor unit.

Indoor Unit Switch Box, PCB, Swing Motor Removal

Procedure for removing the switch box, PC board, and swing motor from the indoor unit.

Indoor Unit Heat Exchanger Removal

Step-by-step guide for removing the heat exchanger from the indoor unit.

Indoor Unit Drain Plug Installation

Procedure for installing the drain plug in the indoor unit.

Indoor Unit Fan Rotor and Motor Removal

Steps for removing the fan rotor and fan motor from the indoor unit.

Outdoor Unit ARK(X)S-C Removal Procedures

Outdoor Unit Panel and Fan Motor Removal

Guide for removing the panels and fan motor from the outdoor unit.

Outdoor Unit Electrical Box Removal

Steps for removing the electrical box from the outdoor unit.

Outdoor Unit Reactor and Partition Plate Removal

Procedure for removing the reactor and partition plate from the outdoor unit.

Outdoor Unit Sound Blanket Removal

Guide for removing the sound insulation blanket from the outdoor unit.

Outdoor Unit Four Way Valve Removal

Procedure for removing the four-way valve from the outdoor unit.

Outdoor Unit Compressor Removal

Step-by-step guide for removing the compressor from the outdoor unit.

Outdoor Unit PCB Removal

Procedure for removing the Printed Circuit Board (PCB) from the outdoor unit.

Outdoor Unit RK(X)H-C Removal Procedures

Removal of External Panels

Guide for removing the external panels from the outdoor unit.

Removal of Bell Mouth

Procedure for removing the bell mouth from the outdoor unit.

Removal of PCB

Procedure for removing the Printed Circuit Board (PCB) from the outdoor unit.

Removal of Electrical Box

Steps for removing the electrical box from the outdoor unit.

Removal of Propeller Fan and Fan Motor

Procedure for removing the propeller fan and fan motor from the outdoor unit.

Removal of Compressor Sound Insulation Pad

Steps for removing the compressor sound insulation pad from the outdoor unit.

Removal of Compressor

Step-by-step guide for removing the compressor from the outdoor unit.

Removal of Four Way Valve

Procedure for removing the four-way valve from the outdoor unit.

Removal of Electronic Expansion Valve

Steps for removing the electronic expansion valve from the outdoor unit.

Miscellaneous Operations and Settings

Test Run Procedure

Procedure for performing a test run using the remote control.

Jumper Setting Configurations

Details jumper settings for specific configurations, like two units in one room.

Appendix: Diagrams and Schematics

Piping Diagrams Overview

Provides diagrams illustrating the refrigerant piping for indoor and outdoor units.

Indoor Unit Piping Diagrams

Piping diagrams specifically for the indoor units.

Outdoor Unit Piping Diagrams

Piping diagrams specifically for the outdoor units.

Wiring Diagrams Overview

Provides wiring diagrams for indoor and outdoor units.

Indoor Unit Wiring Diagrams

Wiring diagrams for the indoor units.

Outdoor Unit Wiring Diagrams

Wiring diagrams for the outdoor units.

Document Index

Index Entries A-Z

Alphabetical listing of topics covered in the manual for quick reference.

Drawings & Flow Charts Index

Visual Aid Index

Index of visual aids and process flow diagrams included in the manual.

Daikin RN25CVMB7 Specifications

General

Category	Air Conditioner
Model	RN25CVMB7
Cooling Capacity	2.5 kW
Heating Capacity	3.2 kW
Power Supply	220-240V, 50Hz
Refrigerant	R32
Operating Temperature (Heating)	-15°C to 24°C