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Mitsubishi Heavy Industries Manuals
Air Conditioner
RKX502A007B
Service support handbook
Mitsubishi Heavy Industries RKX502A007B Service Support Handbook
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Table of Contents
Troubleshooting
Bookmarks
Table of Contents
Compatibility
Screenshots
Description
Warning
Rkx502A001C
Hi-Wall Mounted Split Systems - Remote Controls of SRK
Indoor Model
Rkw502A200
Rla502A701R
RC-E5 Layout
Rc-E5 Operation Data
Details of 33 Compressor Protection Status
RC-EX1 & EX1A Layout
Top Screen
RC-EX3 Layout
Rc-Ex Operation Data
Master/ Slave and Group Settings
Master / Slave Settings
Group Settings
Refrigerant Piping Information
Rac Fault Codes
Outdoor Unit
Indoor Unit
Rac Multisplit Fault Codes
Pac Self-Diagnosis Information
Kx Self-Diagnosis Information
Compressor Windings Resistances
Diagnosis
Test Procedure – Inverter Checker Compatibility
Test Procedure – Using an Inverter Checker
Test Procedure – 1PH & 3PH Diode Module
1 Phase Diode Module
3 Phase Diode Module
Test Procedure – 3 PH Transistor Module
Test Procedure – Electronic Expansion Valve
DC Fan Motor Testing
Wiring of DC Fan Motor
DC Fan Motor Type
Type “A” Fan Motor
Type “B / C” Fan Motor
Type ‘D’ Fan Motor
Outline of the Driver Circuit
Resistance of Motor's Coil
Connection Table of Power Lead Wires
Connection Table of Sensor Lead Wires
Trouble Shooting Refrigeration System
Colour of Compressor Oil
Thermistor Temperature & Resistance Characheristics
Remote Control Temperature Sensor (Thc)
Outdoor Air Temperature Sensor (THO-A) PAC & KX
Hi-Wall Mounted Inverter Split Systems
Service Mode Display Procedure
Self-Diagnostic Data
Operation Mode
Error Code Data
Stop Data
Remote Control Information Tables
Sensor Table
Run Light
Service Data Record Form
Service Mode Error Code & Stop Code Table
PFD Box Replacement
Compatibility for PFD BOX
PFD Box Connection
Output from CNT
Applying New PFD Box to KXRE4 Systems
CNT 6 Wire Adaptor
Fitting the Cnt Connector
Remote Indication Relays
Changing Operation of the Cnt Connector, 635566’S, On/Off Control
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Quick Links
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Screenshots
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Remote Control
3
Indoor Model
4
Rkx502A001C
5
Hi-Wall Mounted Split Systems - Remote Controls of Srk
6
Operation Mode
7
Remote Control Information Tables
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SERVICE
SUPPORT
HANDBOOK
www.dwgeire.ie
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Summarization of Contents
MHI e-service App
App Compatibility and Description
Details on system requirements, features, and availability of the MHI e-service application.
Important Safety Warnings
Handbook Usage and Personnel Qualifications
Information on intended users, safety procedures, and qualifications for handling MHI products.
Hi-Wall Mounted Split Systems Remote Controls
Remote Control Models and Button Functions
Lists remote control models for SRK units and explains the function of each button.
RC-E5 Remote Control Layout
RC-E5 Remote Control Components
Diagram detailing the LCD display, buttons, and indicators of the RC-E5 remote control.
RC-E5 Operation Data
RC-E5 Operation Data and Protection Status
Provides operational data parameters and details on compressor protection statuses for RC-E5.
RC-EX1 & EX1A Remote Control Layout
RC-EX1/EX1A Remote Control Components
Diagram detailing the LCD display, buttons, and indicators of the RC-EX1 and RC-EX1A remotes.
RC-EX3 Remote Control Layout
RC-EX3 Remote Control Components
Diagram detailing the LCD display, buttons, and indicators of the RC-EX3 remote control.
RC-EX Operation Data
RC-EX Operation Data and Protection Status
Provides operational data parameters and details on compressor protection statuses for RC-EX.
Master / Slave and Group Settings
System Configuration for Multi-Unit Control
Explains master/slave setup and group addressing for controlling multiple indoor units.
Refrigerant Piping Information
Piping Specifications for Current Models
Details piping lengths, diameters, and charge for RAC, SCM, and PAC current models.
RAC Fault Codes
RAC Fault Code Descriptions and Causes
Lists fault codes for SRK, SRR/SRF, and SRC units with their descriptions and possible causes.
RAC Multispit Fault Codes
Multispit Fault Code Descriptions and Causes
Lists fault codes for current and previous RAC multispit models with descriptions and causes.
PAC Self-Diagnosis Information
PAC Error Codes and Possible Causes
Details self-diagnosis error codes for PAC units, including LED indications and causes.
KX Self-Diagnosis Information
KX Error Codes and Probable Causes
Lists error codes for KX indoor units, including LED display patterns and probable causes.
Compressor Windings Resistance Test
Compressor Windings Resistance Diagnosis
Procedure and criteria for testing compressor windings resistance to diagnose faults.
Inverter Checker Compatibility
Unit Settings for Inverter Checker Test
Details on unit settings and inverter types required for compatibility testing.
Using an Inverter Checker
Inverter Checker Test Procedures
Step-by-step guide on using the inverter checker for different unit types.
1PH & 3PH Diode Module Test Procedure
Diode Module Resistance and Buzzer Test
Procedure for testing 1PH and 3PH diode modules using a multimeter and buzzer.
3 PH Transistor Module Test Procedure
Transistor Module Resistance Test
Procedure for testing the resistance of 3-phase transistor modules to identify damage.
Electronic Expansion Valve Test Procedure
EEV Solenoid Coil Resistance Test
Method for testing the resistance of the EEV solenoid coil for old and new units.
DC Fan Motor Testing
DC Fan Motor PWB Outputs and Resistances
Expected readings for DC fan motor PWB outputs and circuit board resistances.
Troubleshooting Refrigeration System
Compressor Oil Colour Analysis
Guide to diagnosing compressor issues based on the colour of the compressor oil.
Thermistor Temperature & Resistance Characteristics
Thermistor Resistance vs. Temperature Charts
Graphs showing temperature-resistance characteristics for various thermistors.
Service Mode Operations
Service Mode Display Procedure
Step-by-step guide to accessing and navigating the service mode for unit diagnostics.
Self-Diagnostic Data
Remote Control Settings for Data Display
Tables correlating remote control settings with displayed self-diagnostic data.
Error Code Data
Stop Data
Remote Control Information Tables
Operation and Fan Speed Switching Information
Tables mapping operation and fan speed settings to abnormal stop indicators.
Sensor Value Tables
Sensor Value Displayed During Error Conditions
Tables showing sensor values when specific error codes are active.
Service Data Record Form
Recording Service and Stop Data
A form for logging service data, error codes, and stop codes for troubleshooting.
Service Mode Error & Stop Code Table
Error Codes for SRK, ZFX/ZGX, ZE/ZE-S1 Series
Details error codes, causes, and occurrence conditions for specific SRK series.
PFD Box Replacement
PFD Box Connection
Applying New PFD Box to KXRE4 Systems
Wiring Modifications for PFD Box Installation
Instructions for modifying wiring when installing new PFD boxes on KXRE4 systems.
CNT 6 Wire Adapter Installation
Remote Start/Stop and Indication Relay Connections
Guide for connecting the CNT 6 wire adapter for remote control and status indication.
Changing Operation via CNT Connector
On/Off Control Configuration Options
Explains how to configure ON/OFF operation using indoor PCB jumpers or SC-BIKN-E interface.
DWG Branch Contacts
Contact Information for Dublin and Cork Branches
Provides addresses, phone numbers, and email for DWG's branch offices.
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