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Mitsubishi Electric Mr. Slim PKA-A24KA User Manual

Mitsubishi Electric Mr. Slim PKA-A24KA
40 pages
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SERVICE MANUAL
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
SPLIT-TYPE, AIR CONDITIONERS
NOTE:
• This manual describes
only service data of the
indoor units.
• RoHS compliant products
have <G> mark on the
spec name plate.
CONTENTS
1. REFERENCE MANUAL
...................................
2
2. SAFETY PRECAUTION
...................................
3
3. PART NAMES AND FUNCTIONS
...................
4
4. SPECIFICATIONS
............................................
7
5. NOISE CRITERION CURVES
..........................
8
6. OUTLINES AND DIMENSIONS
.......................
9
7. WIRING DIAGRAM
.........................................10
8. REFRIGERANT SYSTEM DIAGRAM
............
11
9. TROUBLESHOOTING
....................................
12
10. SPECIAL FUNCTION
.....................................
26
11. DISASSEMBLY PROCEDURE
.......................
29
Indoor unit
[Model names] [Service Ref.]
PARTS CATALOG (OCB457)
No. OCH457
March 2009
PKA-A24KA
PKA-A24KA.TH
PKA-A30KA
PKA-A30KA.TH
PKA-A36KA
PKA-A36KA.TH
PKA-A24KAL
PKA-A24KAL.TH
PKA-A30KAL
PKA-A30KAL.TH
PKA-A36KAL
PKA-A36KAL.TH
ON/OFF
TEMP.
COOL
DRY
AUTO
FAN
HEAT
3 3 2 2 3
WIRED REMOTE
CONTROLLER
WIRELESS REMOTE
CONTROLLER
INDOOR UNIT
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Mitsubishi Electric Mr. Slim PKA-A24KA Specifications

General IconGeneral
BrandMitsubishi Electric
ModelMr. Slim PKA-A24KA
CategoryAir Conditioner
LanguageEnglish

Summary

REFERENCE MANUAL

OUTDOOR UNIT SERVICE MANUAL

Lists service manuals for outdoor units and their corresponding reference numbers.

TECHNICAL DATA BOOK

Lists technical data books for specific outdoor unit series.

SAFETY PRECAUTION

GENERAL SAFETY OBSERVATIONS

Emphasizes disconnecting all supply circuits before accessing terminals.

R410A REFRIGERANT HANDLING CAUTIONS

Provides guidelines for using R410A refrigerant, including pipe preparation, oil types, charging, and tools.

PART NAMES AND FUNCTIONS

INDOOR UNIT COMPONENTS

Identifies key parts of the indoor unit, including the front grille, filter, air inlet, and louvers.

WIRED REMOTE CONTROLLER DETAILS

Explains the display elements and operation buttons of the wired remote controller.

WIRELESS REMOTE CONTROLLER DETAILS

Details the display indicators and operational buttons of the wireless remote controller.

SPECIFICATIONS

INDOOR UNIT SPECIFICATIONS

Lists detailed specifications for PKA-A24, PKA-A30, and PKA-A36 indoor units.

NOISE CRITERION CURVES

NOISE LEVEL ANALYSIS

Presents octave band sound pressure levels and corresponding NC curves for different models.

OUTLINES AND DIMENSIONS

INDOOR UNIT DIMENSIONAL DRAWINGS

Provides detailed dimensional drawings and measurements for the indoor units.

WIRING DIAGRAM

INDOOR UNIT WIRING SCHEMATICS

Illustrates the electrical connections and component layout for the indoor unit.

REFRIGERANT SYSTEM DIAGRAM

REFRIGERANT CIRCUIT OVERVIEW

Depicts the refrigerant flow path and includes component locations like heat exchangers and strainers.

TROUBLESHOOTING

GENERAL TROUBLESHOOTING APPROACH

Outlines general actions for recurring and non-recurring troubles based on error code display.

REMOTE CONTROLLER MALFUNCTION DIAGNOSIS

Provides a step-by-step procedure for diagnosing malfunctions using the remote controller.

SELF-DIAGNOSIS ERROR CODE ACTIONS

Details error codes, causes, and countermeasures for common unit malfunctions.

TROUBLESHOOTING BY UNPECIFIED PHENOMENA

Addresses troubleshooting based on observed phenomena like LED status or vane performance.

EMERGENCY OPERATION PROCEDURES

Explains how to activate emergency operation when remote controllers fail or are unavailable.

PARTS CHECK AND TESTING

Details methods for checking the resistance and condition of key internal components.

INDOOR CONTROLLER BOARD TEST POINTS

Illustrates test points on the indoor controller board for voltage and signal checks.

DIP SWITCH AND JUMPER WIRE FUNCTIONS

Explains the functions and settings of DIP switches and jumper wires on the control PC board.

SPECIAL FUNCTIONS

ROTATION AND BACK-UP FUNCTIONS

Describes how main and sub units operate alternately and provide backup functionality.

2ND STAGE CUT-IN FUNCTION

Explains the function where a second unit starts operation when capacity is insufficient.

SETTING ROTATION AND CUT-IN FUNCTIONS

Details the procedure for setting rotation and 2nd stage cut-in functions using the wired remote controller.

BACK-UP HEATING FUNCTION OPERATION

Describes the operation of the back-up heater based on temperature differences.

DISASSEMBLY PROCEDURE

REMOVING THE FRONT PANEL AND HOUSING

Details how to remove the front grille, panel, and corner box from the indoor unit.

REMOVING THE INDOOR CONTROLLER BOARD

Explains the process of removing the indoor controller board and wireless remote controller board.

ELECTRICAL BOX AND NOZZLE ASSEMBLY REMOVAL

Covers the removal of the electrical box, nozzle assembly, and drain hose.

VANE MOTOR UNIT DISASSEMBLY

Provides steps for removing the vane motor from its unit.

INDOOR FAN MOTOR AND LINE FLOW FAN REMOVAL

Details the procedure for removing the indoor fan motor and the line flow fan.

THERMISTOR REMOVAL

Explains how to remove the liquid pipe and condenser/evaporator thermistors.

HEAT EXCHANGER AND ROOM TEMPERATURE THERMISTOR REMOVAL

Covers the removal of the heat exchanger and the room temperature thermistor.

RoHS PARTS LIST

PANEL AND HEAT EXCHANGER PARTS DIAGRAM

Illustrates the panel and heat exchanger components with numbered parts for identification.

PANEL AND HEAT EXCHANGER PARTS LISTING

Lists part numbers, names, and specifications for panel and heat exchanger components.

FUNCTIONAL PARTS

FUNCTIONAL PARTS ILLUSTRATION

Displays an illustration of various functional parts with numerical labels for identification.

FUNCTIONAL PARTS LISTING

Lists part numbers, names, and specifications for functional components like motors, boards, and remotes.

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