Mitsubishi Electric PKH18FK User Manual

TECHNICAL & SERVICE MANUAL
SPLIT-TYPE,HEAT PUMP AIR CONDITIONERS
CONTENTS
1. FEATURES ···········································2
2. SPECIFICATIONS·································5
3. DATA·····················································6
4. OUTLINES AND DIMENSIONS··········16
5. WIRING DIAGRAM·····························22
6. REFRIGERANT SYSTEM DIAGRAM ······25
7. OPERATION FLOW-CHART··············26
8. MICROPROCESSOR CONTROL·······30
9. TROUBLESHOOTING························51
10. SYSTEM CONTROL···························59
11. DISASSEMBLY INSTRUCTIONS·······64
12. PARTS LIST········································71
13. OPTIONAL PARTS ·····························83
<Indoor unit>
Models
Indoor unit
Wall Mounted
Series PKH
MITSUBISHI ELECTRIC
-CENTRALLY CONTROLLED-
STAND BY
DEFROST
ON
CHECK DRY
COOL
HEAT
CHECK
SET TEMP
TIMER OFF
AUTO STOP
AUTO START
F
HR
F
LOW HIGH
AUTO RETURN
CHECK TEST RUN
POWER
ON/OFF
HEAT
SET
TEMPERATURE
AUTO COOL/DRY
COOLERWARMER
TIMER MODE HOURS
FAN SPEED LOW/HIOGH
AIR
DISCHARGE
UP/DOWN
SWING
STOP
CHECK TEST RUN
REMOTE CONTROLLER
The Slim Line.
From Mitsubishi Electric.
PKH18FK / PUH18EK
PKH24FK / PUH24EK
PKH30FK / PUH30EK
PKH36FK / PUH36EK
No. OC120
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OC120--1.qxp 24/6/97 12:20 AM Page 1

Mitsubishi Electric PKH18FK Specifications

General

Brand	Mitsubishi Electric
Model	PKH18FK
Category	Air Conditioner
Language	English

Summary

Features

Compact Design and Installation Adaptability

Highlights downsized models requiring minimal wall space and adaptable installation features.

Noise Suppression and Auto Flap Shutter

Describes low-noise operation and the auto flap shutter for comfortable airflow control.

Specifications

Model and Unit Specifications

Lists technical data for PKH indoor units and PUH outdoor units, including capacity, power, and dimensions.

Operating Range and Refrigerant Piping

Details operational temperature/humidity limits and specifications for refrigerant piping.

Data

Performance Data (Cooling and Heating)

Provides detailed cooling and heating capacity performance data across various conditions.

Pressure and Temperature Data

Presents condensing and suction pressure data, and related temperature performance curves.

Standard Operation Data

Lists standard operational parameters for electrical, refrigerant, and unit sides.

Outlines and Dimensions

Indoor Unit Dimensions (PKH Series)

Provides detailed dimensional drawings for PKH series indoor units.

Outdoor Unit Dimensions (PUH Series)

Shows dimensional drawings and necessary clearances for PUH series outdoor units.

Remote Controller Dimensions

Provides dimensional drawings for the PKH series remote controller.

Wiring Diagram

Indoor Unit Wiring Diagram (PKH Series)

Shows the electrical schematic for PKH series indoor units, including components and connections.

Outdoor Unit Wiring Diagram (PUH Series)

Details the electrical wiring diagram for PUH series outdoor units.

Refrigerant System Diagram

Refrigerant System Diagrams by Model

Illustrates the refrigerant flow and components for PKH18/24/30/36FK models.

Operation Flow-Chart

Main, Cooling, Heating, and Dry Operation Flow-Charts

Details the operational logic and decision steps for main, cooling, heating, and dry modes.

Microprocessor Control

Microprocessor Control Outline and Indoor Unit Control

Explains the system architecture and indoor unit control logic.

Compressor, Fan, and Vane Control Logic

Details control logic for compressor, fan speed, and auto vane.

Outdoor Unit Control and Defrosting

Covers outdoor unit operation, protective functions, and defrosting.

Configuration Switches and Functions

Explains dip switch, jumper, and timer functions for system configuration.

Troubleshooting

Test Run and Self-Diagnostic Troubleshooting

Guides for resolving issues during test runs and using self-diagnosis.

Check Codes and Service Data Indication

Lists diagnostic check codes, causes, and service data indications.

Troubleshooting by Check Code and Wiring Errors

Provides steps for resolving issues based on check codes and wiring mistakes.

Other Troubles, Causes, and Interlock Issues

Addresses miscellaneous troubles, causes, and LOSSNAY interlock operation.

System Control

System Control Function Variety

Outlines different system control configurations like single remote, dual remote, and group control.

Group Control Methods

Details wiring and address setting for group control with single or multiple remotes.

Remote ON-OFF and Multiple Display Control

Explains remote ON/OFF switches and multiple display adapter functions.

Timer and Centralized Controller Options

Covers optional timers, adapters, and centralized remote controller setup.

Disassembly Instructions

Indoor Unit Disassembly Procedures

Step-by-step guide for disassembling the PKH series indoor unit components.

Outdoor Unit Disassembly Procedures

Guides for disassembling PUH series outdoor unit components.

Parts List

Indoor Unit Structural and Functional Parts

Lists structural and functional parts for PKH series indoor units.

Outdoor Unit Functional and Structural Parts

Lists functional and structural parts for PUH series outdoor units.

Optional Parts

Optional Refrigerant Pipes

Lists optional refrigerant pipes by part number, length, size, and connection method.

Optional Timer and Adapter

Details specifications for optional program timers and adapters.

Timer Connection and Functions

Explains how to connect and use program timers and their functions.

Remote Controller Adapters and Centralized Control

Covers adapters for multiple remotes and centralized controller setup.