Daikin FTK50HVEC User Manual

Si18-201
J Series
[Applied Models]
!
!!
!Super Multi Plus : Cooling Only
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!Super Multi Plus : Heat Pump
Service
Manual

Daikin FTK50HVEC Specifications

General

Brand	Daikin
Model	FTK50HVEC
Category	Heat Pump
Language	English

Summary

Part 1 List of Function

1.1 Function List for General

Details the general functionalities across various indoor and outdoor units.

Part 2 Specifications

1. Specifications

Presents detailed technical specifications for the air conditioning system components.

1.1 Outdoor Units

Provides detailed technical specifications for outdoor units.

1.2 BP Units

Lists the technical specifications for Branch Pipe (BP) units.

1.3 Indoor Units (for General)

Part 3 Printed Circuit Board Connector Wiring Diagram and Name

1. Printed Circuit Board Connector Wiring Diagram and Name

Illustrates PCB connector layouts and names for system components.

1.1 Branch Provider Unit BPMK928B42, B43

1.2 Outdoor Unit RMK (X) 140JVMT (C) 9 (8), RMK140JAVM, RMX140JVMB, RMK (X) 140JZVMA (B)

Provides wiring diagrams for various outdoor unit models.

1.3 FTK25 / 35J Series, FTX25 / 35J Series, FTXD25 / 35K Series, FVX25 / 35K Series

1.4 FTK50~60HV Series, FTKD50~71JV Series, FTX50~60HV Series, FTXD50~71JV Series

1.5 CDX25~60HAV Series, CDK25~60HAV Series

1.6 FLK25~60HV Series, FLX25~60HV Series, FLK50 / 60JV Series, FLX50 / 60JV Series

1.7 FHYC35~71KV Series

1.8 FDYM60FA, FDYM03FA Series

Part 4 Main Functions Indoor Unit

1. Main Functions

1.1 Main Functions in Split Type

Explains the core functions and operational modes for split system indoor units.

Part 5 Main Functions Outdoor Unit / BP Unit

1. Refrigerant System and Function of Functional Parts of Outdoor Unit

Explains the refrigerant system and components of outdoor units.

1.1 Refrigerant System and Function of Functional Parts of Outdoor Unit

Details the operational principles of the refrigerant system and its parts.

1.2 Major Functional Parts

1.3 Protective Devices, Thermistors, Sensors

Lists and explains protective devices, thermistors, and sensors in the system.

2. Protection Device

Details the protection mechanisms for outdoor and BP units.

2.1 Outdoor Unit

3. System control

Explains the overall system control logic and operations.

3.1 Outline of System Control

3.6 Determination of Initial Frequency

3.8 Defrost Operation

3.11 Capacity Control

3.12 Peak Cut Control

3.13 Freeze-Up Prevention

Details the system's mechanism to prevent freezing of the indoor heat exchanger.

3.14 Gas Shortage Malfunction

Describes how gas shortage malfunctions are detected and handled.

3.15 Discharge Pipe Control

3.16 Input Current Control

3.18 Electric Parts Cooling and Electric Parts / Fin Temperature Control

3.22 PI Control

3.24 Compressor Protection Control

Explains the control measures for compressor protection during startup.

3.25 Fan Control

3.26 Motorized Valve Control of Outdoor Unit

Explains the control logic for outdoor unit motorized valves.

3.27 Cooling Outdoor Unit SC Control

3.28 BP Unit Motorized Valve Control

3.29 Gas Pipe Isothermal Control in Cooling Operation

3.30 SH Control in Cooling Operation

3.31 SC Control in Heating Operation

3.32 Heat Exchanger Isothermal Control in Heating Operation

3.33 BP Unit Motorized Valve Control in High Discharge Pipe Temperature

3.36 BP Unit Motorized Valve Control by Target Discharge Pipe Temperature

3.37 4-Way Valve Operation

Explains the operation and security of the 4-way valve.

3.39 Pump Down Operation

3.40 Protection Control of SkyAir Indoor Units

Explains protection controls for SkyAir indoor units.

Part 6 Flow of Refrigerant

1. Flow of Refrigerant

Provides an overview of refrigerant flow paths in the system.

1.1 Flow of Refrigerant

Details the refrigerant flow diagrams for various operational modes.

1.14 Defrost Operation

Part 7 Operations

1. Remote Controller

1.1 Wireless Remote Controller

Explains the operation and features of the wireless remote controller.

Part 8 Operating Test

1. Operating Test

Outlines the procedure for conducting an operating test of the system.

1.1 Operating Test

Details the step-by-step process for performing an operating test.

1.2 Test Operation Switch

1.3 Pump Down Operation Switch

2. Method of Field Set

Details the procedures for field setting and configuration.

2.1 Field Setting

Provides step-by-step instructions for setting parameters in the field.

2.2 Group Number Setting for Central Remote Control

2.4 Precautions: For RMK140J / RMX140J Outdoor Unit Users

Part 9 Service Diagnosis

1. Troubleshooting - Split Type Indoor Unit

Guides for troubleshooting issues specific to split type indoor units.

1.1 Troubleshooting with the Operation Lamp

1.2 Service Check Function

1.3 Code Indication on the Remote Controller

Lists and explains error codes displayed on the remote controller.

1.4 Troubleshooting

General troubleshooting steps for indoor units.

1.5 Troubleshooting Detail

In-depth troubleshooting procedures for specific indoor unit faults.

2. Troubleshooting - SkyAir Indoor Unit

Guides for troubleshooting issues specific to SkyAir indoor units.

2.1 The INSPECTION/TEST Button

2.2 Self-Diagnosis by Wired Remote Controller

2.3 Fault Diagnosis by Wireless Remote Controller

2.4 Troubleshooting by LED on the Indoor Unit’s

2.5 Troubleshooting by Remote Controller Display / LED Display

2.6 Troubleshooting Detail

In-depth troubleshooting for specific SkyAir indoor unit faults.

3. Troubleshooting - Outdoor Unit Related

Guides for troubleshooting issues related to outdoor units.

3.1 The Unit Runs but Doesn’t Cool (Heat) the Room

Troubleshooting steps when the unit fails to cool or heat the room.

3.2 7 Seg. Display on the Outdoor P. C. Board

3.3 Troubleshooting Detail

In-depth troubleshooting for specific outdoor unit faults.

3.4 How to Check

4. BP Unit Trouble Diagnosis

Guides for diagnosing issues with Branch Pipe (BP) units.

4.2 LED On Branch Provider Unit (Diagnosis LEDs)

Part 10 Removal Procedure

1. For BPMK928B42 · 43

Procedure for removing components from BPMK928B42 and B43 units.

1.2 Opening of Electrical Box Cover and Removal of PCB Mount

Procedure to access and remove the PCB mount from the electrical box.

1.3 Removal of Motorized Valve

Step-by-step guide for removing the motorized valve.

1.4 Removal of Thermistor

Instructions for safely removing thermistor components.

2. Outdoor Unit

Procedures for disassembling and removing outdoor unit components.

2.1 Removal of Outer Panels

2.2 Removal of PCB and Electrical Box

Procedure to remove the PCB and electrical box assembly.

2.3 Removal of Propeller Fans and Fan Motors

2.4 Removal of Thermistor

2.5 Removal of Motorized Valve

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

2.7 Removal of Compressor

Detailed steps for safely removing the compressor unit.

2.8 Removal of 4-way Valve

Procedure for dismounting and removing the 4-way valve assembly.

3. Indoor Unit

3.1 Refer following table for indoor unit removal procedure

Part 11 Cautions before Operation

1. Installation

Important cautions and guidelines for the installation process.

1.1 Outdoor Unit

Cautions specifically for the installation of the outdoor unit.

1.2 BP Unit

2. Wiring

Essential cautions regarding electrical wiring connections.

2.1 Outdoor Unit

Wiring precautions specific to the outdoor unit connections.

2.2 BP Unit

2.3 Outdoor Unit Rotary Switch Setting