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Mitsubishi Electric SLZ-KF18NA1 User Manual

Mitsubishi Electric SLZ-KF18NA1
54 pages
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TECHNICAL & SERVICE MANUAL
CONTENTS
1. REFERENCE MANUAL
......................
2
2. SAFETY PRECAUTION ......................2
3. PARTS NAMES AND FUNCTIONS
.....
6
4. SPECIFICATIONS
...............................
7
5. OUTLINES AND DIMENSIONS
...........
9
6. WIRING DIAGRAM
............................
10
7.
REFRIGERANT SYSTEM DIAGRAM
.....
11
8. TROUBLESHOOTING
.......................
12
9. SPECIAL FUNCTION
........................
26
10. 4-WAY AIRFLOW SYSTEM
...............
27
11. DISASSEMBLY PROCEDURE
..........
29
12. REMOTE CONTROLLER
..................
33
Indoor unit
[Model Name] [Service Ref.]
SLZ-KF09NA1
SLZ-KF12NA1
SLZ-KF15NA1
SLZ-KF18NA1
INDOOR UNIT
Model name
indication
SLZ-KF09NA1
SLZ-KF12NA1
SLZ-KF15NA1
SLZ-KF18NA1
WIRED REMOTE CONTROLLER
(Option)
PARTS CATALOG (TCB118)
SPLIT-SYSTEM HEAT PUMP
WIRELESS REMOTE
CONTROLLER
(Option)
No. TCH118
April 2023
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Mitsubishi Electric SLZ-KF18NA1 Specifications

General IconGeneral
RefrigerantR410A
Cooling Capacity5.0 kW
Energy Efficiency Ratio (EER)3.6 COP
Indoor Unit Dimensions (W x H x D)800 x 295 x 223 mm
Weight10 kg
Power Supply1-Phase
Coefficient of Performance (COP)3.6
Noise Level (Indoor Unit)24 dB(A)
Indoor Unit Dimensions (HxWxD)295 x 800 x 223 mm
Indoor Unit Weight10 kg

Summary

Reference Manual Overview

Safety Precautions for Operation

General Safety Procedures

Emphasizes disconnecting all supply circuits before accessing terminals for safety.

Repair Service Preparation and Precautions

Service Warnings and Refrigerant Guidelines

Mandatory Service Protocols

Prohibits unauthorized unit modifications and mandates complete refrigerant recovery.

Indoor Unit Technical Specifications

Indoor Unit Wiring Diagram

Refrigerant System Diagram

Troubleshooting Overview

Troubleshooting by Check Code Status

Guides actions based on reoccurring troubles and check code status.

Malfunction Diagnosis via Remote Controller

Explains diagnosing malfunctions using remote controller beep and blink patterns.

Specific Error Code Explanations

Indoor Unit Error Codes and Symptoms

Lists specific error codes for the indoor unit, their symptoms, and remarks.

External Unit Error Codes

Details error codes originating from units other than the indoor unit.

Post-Test Run Troubleshooting Guide

Self-Diagnosis Action Tables

Advanced Self-Diagnosis Troubleshooting

Drain Pump and Fan Motor Error Resolution

Troubleshooting steps for drain pump lock protection and fan motor errors.

Refrigerant and Temperature Anomaly Countermeasures

Countermeasures for freezing/overheating protection and pipe temperature anomalies.

Thermistor and Refrigerant Circuit Diagnosis

Condenser/Evaporator Thermistor (TH5) Issues

Addresses TH5 issues and refrigerant circuit abnormalities, including 4-way valve checks.

Communication and Controller Error Diagnosis

Remote Controller Communication Errors (E3, E5)

Troubleshooting steps for remote controller transmission and signal receiving errors.

Water Leakage and Motor Troubleshooting

Forced Compressor Stop (PA) Diagnosis

Covers troubleshooting for forced compressor stops caused by water leakage abnormalities.

Troubleshooting Based on LED Indicators

Interpreting Indoor Controller Board LED Status

Explains how to interpret LED2 status on the indoor controller board for troubleshooting.

Vane and Receiver Component Troubleshooting

Indoor Controller Board Test Points

DIP Switch Functionality

Troubleshooting Main Parts

Thermistor and Vane Motor Resistance Checks

Provides methods for checking the resistance of thermistors and the vane motor for troubleshooting.

Thermistor Characteristics and Fan Motor Diagnostics

Disassembly Procedures

Disassembly of Electrical Parts and Sensors

Disassembly of Thermistors and Fan Motor

Disassembly of Drain Pump and Heat Exchanger

Error Information Display and Reset

Viewing and Resetting Error Codes

Describes how to view error codes, units, and contact information, and how to reset errors.

Detailed Error Information Access

Service Menu Access and Navigation

Test Run Procedures for PAR-41MAA

Test Run Procedures for PAR-SL101A-E

Function Setting Configuration

Function Setting with PAR-SL101A-E

Error History Management

Viewing and Deleting Error Records

Explains how to view error history records and how to delete them from the controller.

Self-Diagnosis Procedures

Self-Diagnosis with PAR-41MAA Remote Controller

Guides on performing self-diagnosis for indoor units using the PAR-41MAA controller.

Self-Diagnosis for PAR-SL101A-E

Executing Self-Check on PAR-SL101A-E

Details steps to perform a self-check for indoor units using the PAR-SL101A-E remote controller.

Remote Controller Functionality Check

Diagnosing Remote Controller Issues

Explains how to check remote controller performance and diagnose issues like transmission line noise.

Smooth Maintenance Procedures

Request Code for Operation Data

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