Related Manuals for Daikin FTXS50BVMA8
Summarization of Contents
Part 1 List of Functions
1. List of Functions
Overview of functions for cooling-only and heat pump models.
1.1 Cooling Only Models
Detailed list of functions for cooling-only models.
1.2 Heat Pump Models
Detailed list of functions for heat pump models.
Part 2 Specifications
1. Specifications
Technical specifications for the air conditioning units.
1.1 Indoor Units - Cooling Only
Specifications for wall-mounted indoor units (cooling only).
Duct Connected Type
Specifications for duct-connected indoor units.
Floor / Ceiling Suspended Dual Type
Specifications for floor/ceiling suspended dual type indoor units.
Floor Standing Type
Specifications for floor-standing indoor units.
1.2 Outdoor Units - Cooling Only
Specifications for outdoor units (cooling only).
1.3 Indoor Units - Heat Pump
Specifications for wall-mounted indoor units (heat pump).
1.4 Outdoor Units - Heat Pump
Specifications for outdoor units (heat pump).
Part 3 Printed Circuit Board Connector Wiring Diagram
1. Printed Circuit Board Connector Wiring Diagram
Diagrams for PCB connectors in wall-mounted types.
1.1 Wall Mounted Type 20/25/35 Class
Connectors for wall-mounted type 20/25/35 class indoor units.
1.2 Wall Mounted Type 50/60/71 Class
Connectors for wall-mounted type 50/60/71 class indoor units.
1.3 Duct Connected Type
Connectors for duct-connected indoor units.
Control PCB Detail (PCB 1)
Detailed diagram of the control PCB for duct-connected types.
Display PCB Detail (PCB 2)
Detailed diagram of the display PCB for duct-connected types.
1.4 Floor / Ceiling Suspended Dual Type
Connectors for floor/ceiling suspended dual type indoor units.
Power Supply PCB (PCB 2)
Diagram of the power supply PCB for floor/ceiling suspended dual types.
Display PCB (PCB 3)
Diagram of the display PCB for floor/ceiling suspended dual types.
Signal Receiver PCB (PCB 4)
Diagram of the signal receiver PCB for floor/ceiling suspended dual types.
1.5 Floor Standing Type
Connectors for floor-standing indoor units.
Power Supply PCB (PCB 1)
Diagram of the power supply PCB for floor-standing units.
1.6 Outdoor Units
Connectors for outdoor units.
Control PCB
Diagram of the control PCB for outdoor units.
Part 4 Function and Control
1. Main Functions
Overview of the primary functions of the air conditioner.
1.1 Frequency Principle
Explanation of how the compressor frequency is controlled.
Main Control Parameters
Key parameters influencing compressor frequency control.
Additional Control Parameters
Parameters that adapt target frequency based on conditions.
Inverter Principle
Explanation of the inverter's role in capacity regulation.
Drawing of Inverter
Schematic view of the inverter principle.
Inverter Features
Key features provided by the inverter system.
Frequency Limits
Functions defining minimum and maximum operating frequencies.
Forced Cooling / Heating Operation
Information on forced operation modes.
1.2 Power-Airflow Dual Flaps, Wide Angle Louvers and Auto-Swing
Description of airflow control features.
Power-Airflow Dual Flaps
Details on the dual flaps for optimal airflow control.
Wide-Angle Louvers
Information on louvers providing wide airflow range.
Auto-Swing
Explanation of the auto-swing process for airflow direction.
Outline of 3-D Airflow
Overview of the 3-D airflow function.
Detail of the Action
Detailed explanation of 3-D airflow action.
1.3 Fan Speed Control for Indoor Units
How fan speed is controlled for indoor units.
Control Mode
Explanation of airflow rate control modes.
Phase Steps
Details on the different phase steps for fan speed control.
Automatic Air Flow Control for Heating
Principle of fan speed control during heating.
Automatic Air Flow Control for Cooling
Principle of fan speed control during cooling.
1.4 Programme Dry Function
Function for removing humidity while maintaining room temperature.
In Case of Inverter Units
Specifics of the dry function for inverter units.
1.5 Automatic Operation
Automatic switching between cooling and heating modes.
Automatic Cooling / Heating Function (Heat Pump Only)
Details of automatic mode for heat pump units.
Detailed Explanation of the Function
In-depth explanation of automatic operation.
1.6 Night Set Mode
Function for economical operation during sleep.
The Night Set Circuit
Explanation of the night set circuit's function.
Cooling Operation
Details of night set mode in cooling operation.
Heating Operation
Details of night set mode in heating operation.
1.7 Intelligent Eye
Function to detect human presence and save energy.
Processing
Steps involved in Intelligent Eye operation.
1. Detection method by Intelligent Eye
How the Intelligent Eye sensor detects human motion.
2. The motions (for example: in cooling)
Example motions of Intelligent Eye in cooling mode.
Others
Additional notes on Intelligent Eye operation.
1.8 Home Leave Operation
Function for preferred temperature and airflow settings.
Outline
Overview of the Home Leave operation.
Detail of the Control
Detailed steps for controlling Home Leave operation.
Others
Notes on Home Leave operation settings.
1.9 Inverter Powerful Operation
Operation to maximize cooling/heating effect.
Outline
Overview of the Powerful Operation mode.
Details of the Control
Control details for Powerful Operation.
1.10 Other Functions
Description of various additional functions.
1.10.1 Hot Start Function
Function to prevent cold air blast during heating.
1.10.2 Signal Receiving Sign
Indication of signal reception.
1.10.3 ON/OFF Button on Indoor Unit
Using the indoor unit's ON/OFF button.
1.10.4 Photocatalytic Deodorizing Filter
Function of the photocatalytic deodorizing filter.
1.10.5 Air-Purifying Filter
Description of the double-structure air-purifying filter.
1.10.6 Air Purifying Filter with Photocatalytic Deodorizing Function
Combined filter for air purification and deodorization.
1.10.7 Mold Proof Air Filter
Details of the mold-proof air filter.
1.10.8 Self-Diagnosis Digital Display
System monitoring and error display.
1.10.9 Auto-restart Function
Automatic restart after power failure.
2. Function of Main Structural Parts
Description of the main structural components.
2.1 Main Structural Parts
Identification of key structural parts.
1. Compressor
Details on the swing compressor.
Heat Pump Model
Diagram for heat pump model structural parts.
Cooling Only Model
Diagram for cooling-only model structural parts.
Note:
Notes on expansion valve and thermistor types.
2.2 Function of Thermistor
Explanation of thermistor functions.
2.2.1 Heat Pump Model
Thermistor functions for heat pump models.
A Outdoor Heat Exchanger Thermistor (DCB)
Function of outdoor heat exchanger thermistor.
B Discharge Pipe Thermistor (DOT)
Function of discharge pipe thermistor.
C Gas Pipe Thermistor (DGN)
Function of gas pipe thermistor.
D Indoor Heat Exchanger Thermistor (DCN)
Function of indoor heat exchanger thermistor.
E Indoor Liquid Pipe Thermistor (DLN)
Function of indoor liquid pipe thermistor.
2.2.2 Cooling Only Model
Thermistor functions for cooling-only models.
A Outdoor Heat Exchanger Thermistor (DCB)
Function of outdoor heat exchanger thermistor in cooling.
B Discharge Pipe Thermistor (DOT)
Function of discharge pipe thermistor.
C Gas Pipe Thermistor (DGN)
Function of gas pipe thermistor.
D Indoor Heat Exchanger Thermistor (DCN)
Function of indoor heat exchanger thermistor.
3. Control Specification
Detailed control specifications for the system.
3.1 Mode Hierarchy
Hierarchy of operating modes and forced operation.
Detail
Details on air conditioner control modes.
1. For heat pump model
Control modes for heat pump models.
2. For cooling only model
Control modes for cooling-only models.
Note:
Notes on operation commands and modes.
Determine Operating Mode
Procedure for determining the operating mode.
3.2 Frequency Control
How frequency is determined based on room conditions.
Outline
Overview of frequency control.
Detail
Detailed explanation of frequency determination.
How to Determine Frequency
Steps to determine the compressor frequency.
For Heat Pump Model
Frequency determination steps for heat pump models.
1. Determine command frequency
Determining the command frequency based on priority.
1.1 Limiting frequency by drooping function
Frequency limiting based on drooping function parameters.
1.2 Limiting defrost control time
Limiting frequency based on defrost control time.
1.3 Forced cooling / heating
Frequency control during forced cooling/heating.
1.4 Indoor frequency command
Frequency command from indoor unit.
2. Determine upper limit frequency
Setting the upper limit frequency based on protection functions.
3. Determine lower limit frequency
Setting the lower limit frequency based on specific functions.
4. Determine prohibited frequency
Identifying prohibited frequency ranges.
Indoor Frequency Command (∆D signal)
Using ∆D signal for indoor frequency command.
Indoor Unit Capacity (S value)
S value for indoor unit capacity in frequency command.
Frequency Initial Setting
Initial setting of frequency based on room conditions.
Outline
Overview of frequency initial setting.
PI Control (Determine Frequency Up / Down by ∆D Signal)
Using PI control to adjust frequency based on ∆D signal.
1. P control
Proportional control for frequency adjustment.
2. I control
Integral control for frequency adjustment.
3. Limit of frequency variation width
Limits on frequency variation width.
4. Frequency management when other controls are functioning
Frequency management during other control operations.
5. Upper and lower limit of frequency by PI control
Setting PI control limits based on S values.
For Cooling Only Model
Frequency determination steps for cooling-only models.
1. Determine command frequency
Determining command frequency for cooling-only models.
1.1 Limiting frequency by drooping function
Frequency limiting for cooling-only models.
1.2 Indoor frequency command
Frequency command from indoor unit for cooling-only models.
3.3 Controls at Mode Changing / Start-up
Controls during mode changes and start-up.
3.3.1 Preheating Operation
Operation during preheating phase.
Outline
Overview of preheating operation.
Detail
Details on preheating conditions.
Preheating ON Condition
Conditions for starting preheating.
OFF Condition
Conditions for stopping preheating.
3.3.2 Four Way Valve Switching
Operation of the four-way valve.
Outline of heating operation
Overview of four-way valve switching in heating.
Detail
Details on four-way valve switching.
The OFF delay of four way valve
Function of the OFF delay for the four-way valve.
3.3.3 Four Way Valve Operation Compensation
Compensation for four-way valve operation.
Outline
Overview of four-way valve compensation.
Detail
Details on four-way valve operation compensation.
Staring Conditions
Conditions for starting four-way valve operation.
3.3.4 3 Minutes Stand-by
3-minute stand-by period after compressor shutdown.
3.3.5 Compressor Protection Function
Protection functions for the compressor.
3.4 Discharge Pipe Control
Control based on discharge pipe temperature.
Outline
Overview of discharge pipe control.
Detail
Details on discharge pipe control.
Divide the Zone
Zoning for discharge pipe temperature control.
Management within the Zone
Management actions within different zones.
3.5 Input Current Control
Control based on input current.
Outline
Overview of input current control.
Detail
Details on input current control.
Limitation of current drooping and stop value according to the outdoor air temperature
Current limits based on outdoor air temperature.
3.6 Freeze-up Protection Control
Control to prevent freezing of the indoor heat exchanger.
Outline
Overview of freeze-up protection control.
Detail
Details on freeze-up protection control.
Conditions for Start Controlling
Conditions for starting freeze-up protection control.
Control in Each Zone
Control zones for freeze-up protection.
3.7 Heating Peak-cut Control
Control to limit peak heating load.
Outline
Overview of heating peak-cut control.
Detail
Details on heating peak-cut control.
Conditions for Start Controlling
Conditions for starting heating peak-cut control.
Control in Each Zone
Control zones for heating peak-cut.
3.8 Fan Control
Control logic for fan operation.
Outline
Overview of fan control logic.
Detail
Details on fan control.
Fan OFF Control when Stopped
Fan OFF control procedures when stopped.
Fan control when the number of heating room decreases
Fan control when heating rooms decrease.
Tap Control in Indoor / Outdoor Unit Silent Operation
Tap control during silent operation.
3.9 Moisture Protection Function 2
Function to protect compressor from moisture.
Outline
Overview of moisture protection function.
Detail
Details on moisture protection function.
Heat Pump Model
Moisture protection for heat pump models.
Cooling Only Model
Moisture protection for cooling-only models.
3.10 Defrost Control
Control logic for defrost operation.
Outline
Overview of defrost control.
Detail
Details on defrost control.
Conditions for Starting Defrost
Conditions required to start defrost operation.
Conditions for Canceling Defrost
Conditions to cancel defrost operation.
3.11 Low Hz High Pressure Limit
Limit for high pressure in low Hz operation.
Outline
Overview of low Hz high pressure limit.
Detail
Details on low Hz high pressure limit.
Separate into Zones
Zones for pressure limit control.
Note:
Note on system stopping in drooping zone.
3.12 Electronic Expansion Valve Control
Control logic for electronic expansion valve.
Outline
Overview of electronic expansion valve control.
Electronic expansion valve is fully closed
Procedure for fully closing the expansion valve.
Room Distribution Control
Control for distributing refrigerant to rooms.
Open Control
Control actions during system start or changes.
Feedback Control
Feedback control mechanisms for the valve.
Distribution control for each room
Control for liquid pipe temperature per room.
Detail
Examples of electronic expansion valve control in different modes.
3.12.1 Fully Closing with Power ON
Initializing EV by fully closing on power ON.
3.12.2 Pressure Equalization Control
Pressure equalization via EV operation.
3.12.3 Opening Limit
Setting maximum and minimum EV opening limits.
Outline
Overview of EV opening limits.
Detail
Details on EV opening limits.
3.12.4 Starting Operation Control / Changing Operation Room
EV control during start-up or room changes.
3.12.5 High Temperature of the Discharge Pipe
EV adjustment for high discharge pipe temperature.
3.12.6 Oil Recovery Function
Function to recover oil from stopped rooms.
Outline
Overview of oil recovery function.
Detail
Details on oil recovery function.
3.12.7 Gas Pipe Isothermal Control During Cooling
Gas pipe temperature control during cooling.
3.12.8 Target Discharge Pipe Temperature Control
Control of discharge pipe temperature.
3.12.9 SC Control
Sub-cooling control for heat pump models.
Outline
Overview of SC control.
Detail
Details on SC control.
Start Functioning Conditions
Conditions for starting SC control.
Determine Electronic Expansion Valve Opening
Setting EV opening for constant temperature difference.
3.12.10 Disconnection of the Discharge Pipe Thermistor
Detection and handling of discharge pipe thermistor disconnection.
Outline
Overview of thermistor disconnection detection.
Detail
Details on thermistor disconnection detection.
Detect Disconnection
Procedure to detect disconnection.
Adjustment when the thermistor is disconnected
Actions to take when thermistor is disconnected.
3.12.11 Control when frequency is changed
Control adjustments when target frequency changes.
3.13 Malfunctions
Information on system malfunctions.
3.13.1 Sensor Malfunction Detection
Detection of thermistor or CT sensor malfunctions.
Relating to Thermistor Malfunction
Common thermistor malfunctions.
Relating to CT Malfunction
Common CT malfunctions.
3.13.2 Detection of Overload and Over Current
Detection of overload and over current.
Outline
Overview of overload and over current detection.
Detail
Details on overload and over current detection.
3.13.3 Insufficient Gas Control
Control for insufficient gas conditions.
Outline
Overview of insufficient gas control.
3.13.4 Preventing Indoor Freezing
Measures to prevent indoor unit freezing.
3.14 Forced Operation Mode
Modes for installation and service operations.
Outline
Overview of forced operation modes.
Detail
Details on forced operation modes.
Forced Cooling, Forced Heating (Only for Heat Pump Model)
Forced cooling/heating procedures for heat pump models.
3.15 Wiring-Error Check
Function to check and correct wiring errors.
Outline
Overview of wiring error check.
Operation
Steps for performing wiring error check.
Note:
Notes on wiring error check procedure.
Basic Knowledge
Underlying principles of wiring error check.
Checking the current setting data on the microcomputer memory
Checking setting data via LED indicators.
Example
Example of LED indicator interpretation.
3.16 Additional Function
Description of additional system functions.
3.16.1 Connection Pipe Condensation Preventing Function
Control to prevent condensation on connection pipes.
3.16.2 Priority Room Setting
Setting room priority for capacity distribution.
Setting method
Method for setting room priority.
Control start conditions
Conditions for starting priority room control.
Note:
Notes on priority room operation precedence.
Cancellation of control
Conditions for canceling priority room control.
3.16.3 Powerful Operation Mode
Mode that increases compressor and fan speed.
3.16.4 Voltage Detection Function
Function to detect power supply voltage.
3.16.5 Cooling / Heating Mode Lock
Function to lock the unit to Cool or Heat mode.
Part 5 System Configuration
Information on system configuration and operation.
1. System Configuration
Overview of system configuration.
1.1 Operation Instructions
Instructions for operating the system.
2. Instruction
General instructions for using the product.
Note:
Note regarding R22 models compatibility.
2.1 Contents and Reference Page
Table of contents and page references.
2.2 Safety Precautions
Important safety precautions for installation and use.
2.3 Names of Parts
Identification of parts on the indoor unit.
■ Indoor Unit
Identification of indoor unit components.
1. Air filter
Description of the air filter.
2. Photocatalytic deodorizing filter or Air purifying filter
Description of air purifying and deodorizing filters.
3. Air inlet
Location of the air inlet.
4. Front grille
Description of the front grille.
5. Grille tab
Location of the grille tab.
6. Room temperature sensor
Function of the room temperature sensor.
7. INTELLIGENT EYE sensor
Function of the Intelligent Eye sensor.
8. Display
Description of the unit display.
9. Air outlet
Location of the air outlet.
10. Flaps (horizontal blades)
Description of horizontal flaps.
11. Louvres (vertical blades)
Description of vertical louvres.
12. Indoor Unit ON/OFF switch
Operation of the indoor unit ON/OFF switch.
13. Operation lamp (green)
Indication of the operation lamp.
14. TIMER lamp (yellow)
Indication of the timer lamp.
15. HOME LEAVE lamp (red)
Indication of the Home Leave lamp.
16. Signal receiver
Function of the signal receiver.
■ Outdoor Unit
Identification of outdoor unit components.
17. Air inlet: (Back and side)
Location of the outdoor unit air inlet.
18. Air outlet
Location of the outdoor unit air outlet.
19. Refrigerant piping and inter-unit cable
Description of refrigerant piping and cables.
20. Drain hose
Location of the drain hose.
21. Earth terminal
Location of the earth terminal.
22. Outside air temperature sensor
Function of the outside air temperature sensor.
■ Remote Controller
Identification and functions of remote controller buttons.
1. Signal transmitter
Function of the signal transmitter.
2. Display
Explanation of the remote controller display.
3. HOME LEAVE button
Button for Home Leave operation.
4. POWERFUL button
Button for Powerful operation.
5. TEMPERATURE adjustment buttons
Buttons to adjust temperature settings.
6. ON/OFF button
Button to start or stop operation.
7. MODE selector button
Button to select operation mode.
8. OUTDOOR UNIT SILENT operation
Button for outdoor unit silent operation.
9. FAN setting button
Button to set fan speed.
10. SWING button
Button for airflow direction swing.
11. SENSOR button
Button for Intelligent Eye operation.
12. ON TIMER button
Button to set ON timer.
13. OFF TIMER button
Button to set OFF timer.
14. TIMER Setting button
Button to set timer time.
15. TIMER CANCEL button
Button to cancel timer setting.
16. CLOCK button
Button to set the clock.
2.4 Preparation before Operation
Steps to prepare the unit before operation.
Preparation Before Operation
Instructions for preparing the unit before use.
■ To set the batteries
Procedure for setting the remote controller batteries.
ATTENTION
Attention points regarding batteries.
Preparation Before Operation
Instructions for operating the remote controller.
■ To operate the remote controller
How to operate the remote controller.
■ To fix the remote controller holder on the wall
Instructions for mounting the remote controller holder.
ATTENTION
Attention points regarding the remote controller.
■ To set the clock
Procedure for setting the unit's clock.
■ Turn the breaker ON
Procedure for turning the breaker ON.
NOTE
Notes on energy saving and usage conditions.
■ Tips for saving energy
Tips for saving energy during operation.
■ Please note
Important notes regarding operation and usage.
2.5 AUTO · DRY · COOL · HEAT · FAN Operation
How to operate the unit in different modes.
AUTO · DRY · COOL · HEAT · FAN Operation
Operating the air conditioner in various modes.
■ To start operation
Steps to start the unit operation.
■ To stop operation
Steps to stop the unit operation.
■ To change the temperature setting
How to adjust the temperature setting.
■ To change the air flow rate setting
How to adjust the air flow rate.
■ To change the air flow direction
How to adjust the airflow direction.
NOTE
Notes on different operation modes and settings.
■ Note on HEAT operation
Notes regarding heating operation.
■ Note on DRY operation
Notes regarding dry operation.
■ Note on AUTO operation
Notes regarding automatic operation.
■ Note on air flow rate setting
Notes on air flow rate settings.
2.6 Adjusting the Air Flow Direction
How to adjust the air flow direction.
■ To adjust the horizontal blades (flaps)
Procedure to adjust horizontal flaps.
■ To adjust the vertical blades (louvres)
Procedure to adjust vertical louvres.
Notes on flaps and louvres angles
Notes on flap and louvre angles.
Notes on flap angle
Notes regarding flap angle settings.
Three-Dimensional (3-D) Airflow
Explanation of the 3-D airflow function.
■ To 3-D Airflow
How to activate 3-D Airflow.
■ To cancel 3-D Airflow
How to cancel 3-D Airflow.
Notes on louvers angles
Notes on louvre angles.
■ To adjust the horizontal blade (flap)
Procedure to adjust horizontal flaps.
■ To adjust the vertical blades (louvres)
Procedure to adjust vertical louvres.
Notes on flap and louvres angles
Notes on flap and louvre angles.
2.7 POWERFUL Operation
Operation to maximize cooling/heating effect.
POWERFUL Operation
Explanation of the Powerful Operation mode.
■ To start POWERFUL operation
Steps to start powerful operation.
■ To cancel POWERFUL operation
Steps to cancel powerful operation.
NOTE
Notes on powerful operation.
■ Notes on POWERFUL operation
Details on powerful operation in different modes.
2.8 OUTDOOR UNIT SILENT Operation
Operation to reduce outdoor unit noise.
OUTDOOR UNIT SILENT Operation
Explanation of outdoor unit silent operation.
■ To start OUTDOOR UNIT SILENT operation
Steps to start outdoor unit silent operation.
■ To cancel OUTDOOR UNIT SILENT operation
Steps to cancel outdoor unit silent operation.
NOTE
Notes on outdoor unit silent operation.
■ Note on OUTDOOR UNIT SILENT operation
Specific notes for outdoor unit silent operation.
2.9 HOME LEAVE Operation
Operation to record preferred temperature and airflow settings.
HOME LEAVE Operation
Explanation of Home Leave operation.
■ To start HOME LEAVE operation
Steps to start Home Leave operation.
■ To cancel HOME LEAVE operation
Steps to cancel Home Leave operation.
Before using HOME LEAVE operation.
Preparation steps before using Home Leave.
■ To set the temperature and air flow rate for HOME LEAVE operation
Procedure to set Home Leave temperature and airflow.
NOTE
Notes on Home Leave operation.
■ What’s the HOME LEAVE operation
Benefits and use cases of Home Leave operation.
■ Useful in these cases.
Situations where Home Leave operation is useful.
1.Use as an energy-saving mode
Using Home Leave for energy saving.
2.Use as a favorite mode
Using Home Leave to recall favorite settings.
NOTE
Important notes on Home Leave operation.
2.10 INTELLIGENT EYE Operation
Operation of the Intelligent Eye sensor.
INTELLIGENT EYE Operation
Explanation of Intelligent Eye function.
■ To start INTELLIGENT EYE operation
Steps to start Intelligent Eye operation.
■ To cancel the INTELLIGENT EYE operation
Steps to cancel Intelligent Eye operation.
Energy saving operation
How Intelligent Eye enables energy saving.
Notes on “INTELLIGENT EYE”
Notes regarding Intelligent Eye operation and range.
CAUTION
Cautions related to Intelligent Eye sensor.
■ To adjust the angle of the INTELLIGENT EYE sensor
Procedure to adjust the sensor's detection angle.
“INTELLIGENT EYE” is useful for Energy Saving
Benefits of Intelligent Eye for energy saving.
■ Energy saving operation
Details of energy saving operation.
Notes on “INTELLIGENT EYE”
Notes on Intelligent Eye application range.
CAUTION
Cautions regarding Intelligent Eye sensor.
■ To adjust the vertical blades (louvres)
Procedure to adjust vertical louvres.
Notes on flaps and louvres angles
Notes on flap and louvre angles.
2.11 TIMER Operation
How to use timer functions for automatic switching.
TIMER Operation
Explanation of timer functions.
■ To use OFF TIMER operation
Steps to set the OFF timer.
■ To cancel the OFF TIMER operation
Steps to cancel the OFF timer.
Notes
Notes on timer settings.
■ NIGHT SET MODE
Night set mode function with OFF timer.
■ To use ON TIMER operation
Steps to set the ON timer.
■ To cancel ON TIMER operation
Steps to cancel the ON timer.
■ To combine ON TIMER and OFF TIMER
How to combine ON and OFF timers.
ATTENTION
Attention points for timer settings after power interruptions.
2.12 Note for Multi System
Notes specific to multi-system installations.
Note for Multi System
Explanation of multi-system setup.
〈〈 What is a “Multi System”? 〉〉
Definition of a multi-system.
This system has one outdoor unit connected to multiple indoor units.
System configuration: one outdoor to multiple indoor units.
■ Selecting the Operation Mode
Guidelines for selecting operation modes in multi-systems.
1. With the Priority Room Setting present but inactive or not present
Operation mode priority when priority room is inactive.
2. With the Priority Room Setting active
Operation mode priority when priority room is active.
■ NIGHT QUIET Mode (Available only for cooling operation)
Night Quiet Mode details for cooling operation.
■ OUTDOOR UNIT SILENT Operation
Operation for reducing outdoor unit noise.
1. With the Priority Room Setting present but inactive or not present
Outdoor unit silent operation with inactive priority room.
2. With the Priority Room Setting active
Outdoor unit silent operation with active priority room.
■ Cooling / Heating Mode Lock (Available only for heat pump models)
Mode lock function for heat pump models.
■ Priority Room Setting
Setting priority for specific rooms.
1. Operation Mode Priority
Priority setting based on operation mode.
2. Priority when POWERFUL operation is used
Priority when Powerful operation is active.
3. Priority when using OUTDOOR UNIT SILENT operation
Priority when using outdoor unit silent operation.
2.13 Care and Cleaning
Procedures for cleaning and maintaining the unit.
CAUTION
Caution before cleaning the unit.
■ Indoor unit, Outdoor unit and Remote controller
Cleaning instructions for all unit components.
■ Front grille
Procedure for opening and removing the front grille.
1. Open the front grille.
Steps to open the front grille.
2. Remove the front grille.
Steps to remove the front grille.
3. Clean the front grille
Procedure for cleaning the front grille.
4. Attach the front grille
Procedure to attach the front grille.
CAUTION
Cautions during front grille handling.
Filters
Procedure for handling air filters.
1. Open the front grille.
Steps to open the front grille.
2. Pull out the air filters.
Steps to remove air filters.
3. Take off the air purifying filter, photocatalytic deodorizing filter.
Steps to remove air purifying/deodorizing filters.
4. Clean or replace each filter.
Instructions for cleaning or replacing filters.
5. Set the air filter, air purifying filter and photocatalytic deodorizing filter as they were and close the front grille.
Steps to reinstall filters and close the front grille.
■ Air Filter
Maintenance instructions for the air filter.
1. Wash the air filters with water or clean them with vacuum cleaner.
How to clean the air filters.
■ Air Purifying Filter (green)
Maintenance and replacement of air purifying filter.
(Replace approximately once every 3 months.)
Recommended replacement interval for air purifying filter.
1. Detach the filter element and attach a new one.
Procedure to replace the filter element.
■ Photocatalytic Deodorizing Filter (gray)
Maintenance and replacement of photocatalytic filter.
[ Maintenance ]
Maintenance procedure for the filter.
1. Dry the photocatalytic deodorizing filter in the sun.
How to regenerate the filter by sun drying.
[ Replacement]
Replacement procedure for the filter.
1. Detach the filter element and attach a new one.
Procedure to replace the filter element.
Check
Checks to perform before a long idle period.
■ Before a long idle period
Procedures for preparing the unit for long-term storage.
1. Operate the “fan only” for several hours on a fine day to dry out the inside.
Procedure to dry the unit using fan-only operation.
2. Clean the air filters and set them again.
Steps to clean and reinstall air filters.
3. Take out batteries from the remote controller.
Procedure to remove remote controller batteries.
4. Turn OFF the breaker for the room air conditioner.
Procedure to turn off the main breaker.
NOTE
Notes on filter condition and ordering.
Check
Checks to perform before a long idle period.
■ Before a long idle period
Procedures for preparing the unit for long-term storage.
1. Operate the “fan only” for several hours on a fine day to dry out the inside.
Procedure to dry the unit using fan-only operation.
2. Clean the air filters and set them again.
Steps to clean and reinstall air filters.
3. Take out batteries from the remote controller.
Procedure to remove remote controller batteries.
4. Turn OFF the breaker for the room air conditioner.
Procedure to turn off the main breaker.
NOTE
Notes on filter condition and ordering.
Check
Checks to perform before a long idle period.
■ Before a long idle period
Procedures for preparing the unit for long-term storage.
1. Operate the “fan only” for several hours on a fine day to dry out the inside.
Procedure to dry the unit using fan-only operation.
2. Clean the air filters and set them again.
Steps to clean and reinstall air filters.
3. Take out batteries from the remote controller.
Procedure to remove remote controller batteries.
4. Turn OFF the breaker for the room air conditioner.
Procedure to turn off the main breaker.
NOTE
Notes on filter condition and ordering.
Check
Checks to perform before a long idle period.
■ Before a long idle period
Procedures for preparing the unit for long-term storage.
1. Operate the “fan only” for several hours on a fine day to dry out the inside.
Procedure to dry the unit using fan-only operation.
2. Clean the air filters and set them again.
Steps to clean and reinstall air filters.
3. Take out batteries from the remote controller.
Procedure to remove remote controller batteries.
4. Turn OFF the breaker for the room air conditioner.
Procedure to turn off the main breaker.
NOTE
Notes on filter condition and ordering.
Check
Checks to perform before a long idle period.
■ Before a long idle period
Procedures for preparing the unit for long-term storage.
1. Operate the “fan only” for several hours on a fine day to dry out the inside.
Procedure to dry the unit using fan-only operation.
2. Clean the air filters and set them again.
Steps to clean and reinstall air filters.
3. Take out batteries from the remote controller.
Procedure to remove remote controller batteries.
4. Turn OFF the breaker for the room air conditioner.
Procedure to turn off the main breaker.
NOTE
Notes on filter condition and ordering.
Check
Checks to perform before a long idle period.
■ Before a long idle period
Procedures for preparing the unit for long-term storage.
1. Operate the “fan only” for several hours on a fine day to dry out the inside.
Procedure to dry the unit using fan-only operation.
2. Clean the air filters and set them again.
Steps to clean and reinstall air filters.
3. Take out batteries from the remote controller.
Procedure to remove remote controller batteries.
4. Turn OFF the breaker for the room air conditioner.
Procedure to turn off the main breaker.
NOTE
Notes on filter condition and ordering.
Check
Checks to perform before a long idle period.
■ Before a long idle period
Procedures for preparing the unit for long-term storage.
1. Operate the “fan only” for several hours on a fine day to dry out the inside.
Procedure to dry the unit using fan-only operation.
2. Clean the air filters and set them again.
Steps to clean and reinstall air filters.
3. Take out batteries from the remote controller.
Procedure to remove remote controller batteries.
4. Turn OFF the breaker for the room air conditioner.
Procedure to turn off the main breaker.
NOTE
Notes on filter condition and ordering.
Check
Checks to perform before a long idle period.
■ Before a long idle period
Procedures for preparing the unit for long-term storage.
1. Operate the “fan only” for several hours on a fine day to dry out the inside.
Procedure to dry the unit using fan-only operation.
2. Clean the air filters and set them again.
Steps to clean and reinstall air filters.
3. Take out batteries from the remote controller.
Procedure to remove remote controller batteries.
4. Turn OFF the breaker for the room air conditioner.
Procedure to turn off the main breaker.
NOTE
Notes on filter condition and ordering.
2.14 Troubleshooting
Troubleshooting common issues.
Troubleshooting
Guide to resolving operational problems.
These cases are not troubles.
Cases that are not actual troubles.
Case
List of common cases and their explanations.
Operation does not start soon.
Reasons why operation may not start immediately.
Hot air does not flow out soon after the start of heating operation.
Reasons for delayed hot air discharge.
The heating operation stops suddenly and a flowing sound is heard.
Explanation for sudden heating stop and sound.
The outdoor unit emits water or steam.
Causes for water or steam emission from the outdoor unit.
Mists come out of the indoor unit.
Causes for mist formation in the indoor unit.
The indoor unit gives out odour.
Reasons for odor emission from the indoor unit.
The outdoor fan rotates while the air conditioner is not in operation.
Reasons for outdoor fan rotation when unit is idle.
The operation stopped suddenly.
Reasons for sudden operation stoppage.
Check again.
Checkpoints before calling for repair.
Case
Troubleshooting cases and checks.
The air conditioner does not operate.
Troubleshooting steps when the unit does not operate.
Cooling (Heating) effect is poor.
Troubleshooting steps for poor cooling/heating.
Operation stops suddenly.
Troubleshooting steps when operation stops suddenly.
An abnormal functioning happens during operation.
Troubleshooting steps for abnormal operation.
Call the service shop immediately.
Immediate actions and when to contact service.
We recommend periodical maintenance
Recommendation for periodic professional maintenance.
Check
Checks before a long idle period.
■ Before a long idle period
Procedures for preparing the unit for long-term storage.
1. Operate the “fan only” for several hours on a fine day to dry out the inside.
Procedure to dry the unit using fan-only operation.
2. Clean the air filters and set them again.
Steps to clean and reinstall air filters.
3. Take out batteries from the remote controller.
Procedure to remove remote controller batteries.
4. Turn OFF the breaker for the room air conditioner.
Procedure to turn off the main breaker.
NOTE
Notes on filter condition and ordering.
Part 6 Service Diagnosis
Guide to diagnosing service issues.
1. Caution for Diagnosis
Precautions for performing diagnosis.
1.1 Troubleshooting with the Operation Lamp
Troubleshooting based on operation lamp status.
2. Problem Symptoms and Measures
Common symptoms and their corresponding measures.
3. Service Check Function
Using the service check function.
4. Code Indication on the Remote Controller
Understanding error codes displayed on the remote controller.
4.1 Error Codes and Description of Fault
List of error codes and their descriptions.
5. Troubleshooting
Detailed troubleshooting guide.
5.1 Indoor Units
Troubleshooting specific to indoor units.
5.2 Outdoor Units
Troubleshooting specific to outdoor units.
5.3 Indoor Unit PCB Abnormality
Troubleshooting indoor unit PCB issues.
5.4 Freeze-up Protection Control or High Pressure Control
Troubleshooting freeze-up or high pressure controls.
5.5 Fan Motor or Related Abnormality
Troubleshooting fan motor and related issues.
5.6 Thermistor or Related Abnormality (Indoor Unit)
Troubleshooting indoor unit thermistor issues.
5.7 Shutter Drive Motor / Shutter Limit Switch Abnormality
Troubleshooting shutter motor and limit switch.
5.8 Signal Transmission Error (between Indoor and Outdoor Units)
Troubleshooting signal transmission errors.
5.9 Unspecified Voltage (between Indoor and Outdoor Units)
Troubleshooting unspecified voltage issues.
5.10 Freeze-up Protection Control
Troubleshooting freeze-up protection control.
5.11 OL Activation (Compressor Overload)
Troubleshooting compressor overload.
5.12 Compressor Lock
Troubleshooting compressor lock issues.
5.13 DC Fan Lock
Troubleshooting DC fan lock issues.
5.14 Input Over Current Detection
Troubleshooting input over current detection.
5.15 Four Way Valve Abnormality
Troubleshooting four-way valve abnormalities.
5.16 Discharge Pipe Temperature Control
Troubleshooting discharge pipe temperature control.
5.17 Position Sensor Abnormality
Troubleshooting position sensor abnormalities.
5.18 CT or Related Abnormality
Troubleshooting CT or related abnormalities.
5.19 Thermistor or Related Abnormality (Outdoor Unit)
Troubleshooting outdoor unit thermistor issues.
5.20 Electrical Box Temperature Rise
Troubleshooting electrical box temperature rise.
5.21 Radiation Fin Temperature Rise
Troubleshooting radiation fin temperature rise.
5.22 Output Over Current Detection
Troubleshooting output over current detection.
5.23 Insufficient Gas
Troubleshooting insufficient gas conditions.
5.24 Low-voltage Detection
Troubleshooting low-voltage detection.
5.25 Anti-icing Function in Other Rooms / Unspecified Voltage (between Indoor and Outdoor Units)
Troubleshooting anti-icing and voltage issues.
6. Check
Procedures for checking components.
6.1 How to Check
General methods for checking system components.
1. Caution for Diagnosis
Precautions for performing diagnosis.
1.1 Troubleshooting with the Operation Lamp
Troubleshooting using the operation lamp indicator.
Caution:
Caution regarding sudden operation stops.
Troubleshooting with the LED Indication
Troubleshooting using outdoor unit LED indicators.
Outdoor Unit
LED indications on the outdoor unit PCB.
2. Problem Symptoms and Measures
Table of common problems and their solutions.
Problem Symptom
List of problem symptoms.
None of the units operates.
Troubleshooting when no units operate.
Operation sometimes stops.
Troubleshooting when operation stops intermittently.
Some indoor units do not operate.
Troubleshooting when some indoor units don't operate.
Equipment operates but does not cool, or does not heat (only for heat pump model).
Troubleshooting when cooling/heating fails.
Large operating noise and vibrations
Troubleshooting for excessive noise and vibration.
3. Service Check Function
How to use the service check function.
4. Code Indication on the Remote Controller
Understanding remote controller error codes.
4.1 Error Codes and Description of Fault
List of error codes and fault descriptions.
5. Troubleshooting
Detailed troubleshooting guide.
5.1 Indoor Units
Troubleshooting for indoor unit issues.
5.2 Outdoor Units
Troubleshooting for outdoor unit issues.
5.3 Indoor Unit PCB Abnormality
Troubleshooting indoor unit PCB abnormalities.
5.4 Freeze-up Protection Control or High Pressure Control
Troubleshooting freeze-up or high pressure controls.
5.5 Fan Motor or Related Abnormality
Troubleshooting fan motor and related issues.
5.5.1 AC Motor
Troubleshooting for AC fan motors.
5.5.2 DC Motor
Troubleshooting for DC fan motors.
5.6 Thermistor or Related Abnormality (Indoor Unit)
Troubleshooting indoor unit thermistor issues.
5.7 Shutter Drive Motor / Shutter Limit Switch Abnormality
Troubleshooting shutter motor and limit switch issues.
5.8 Signal Transmission Error (between Indoor and Outdoor Units)
Troubleshooting signal transmission errors.
5.9 Unspecified Voltage (between Indoor and Outdoor Units)
Troubleshooting unspecified voltage issues.
5.10 Freeze-up Protection Control
Troubleshooting freeze-up protection control.
5.11 OL Activation (Compressor Overload)
Troubleshooting compressor overload (OL activation).
5.12 Compressor Lock
Troubleshooting compressor lock issues.
5.13 DC Fan Lock
Troubleshooting DC fan lock issues.
5.14 Input Over Current Detection
Troubleshooting input over current detection.
5.15 Four Way Valve Abnormality
Troubleshooting four-way valve abnormalities.
5.16 Discharge Pipe Temperature Control
Troubleshooting discharge pipe temperature control.
5.17 Position Sensor Abnormality
Troubleshooting position sensor abnormalities.
5.18 CT or Related Abnormality
Troubleshooting CT or related abnormalities.
5.19 Thermistor or Related Abnormality (Outdoor Unit)
Troubleshooting outdoor unit thermistor issues.
5.20 Electrical Box Temperature Rise
Troubleshooting electrical box temperature rise.
5.21 Radiation Fin Temperature Rise
Troubleshooting radiation fin temperature rise.
5.22 Output Over Current Detection
Troubleshooting output over current detection.
5.23 Insufficient Gas
Troubleshooting insufficient gas conditions.
5.24 Low-voltage Detection
Troubleshooting low-voltage detection.
5.25 Anti-icing Function in Other Rooms / Unspecified Voltage (between Indoor and Outdoor Units)
Troubleshooting anti-icing and voltage issues.
6. Check
Procedures for checking system components.
6.1 How to Check
Methods for checking components.
6.1.1 Fan Motor Connector Output Check
Checking fan motor connector outputs.
Check No.01
Procedure for Check No. 01.
Check No.02
Procedure for Check No. 02.
6.1.2 Limit Switch Continuity Check
Checking limit switch continuity.
Check No.3
Procedure for Check No. 3.
6.1.3 Electronic Expansion Valve Check
Checking the electronic expansion valve.
Check No.4
Procedure for Check No. 4.
6.1.4 Four Way Valve Performance Check
Checking the performance of the four-way valve.
Check No.5
Procedure for Check No. 5.
6.1.5 Thermistor Resistance Check
Checking thermistor resistance.
Check No.6
Procedure for Check No. 6.
6.1.6 Installation Condition Check
Checking installation conditions.
Check No.7
Procedure for Check No. 7.
6.1.7 Discharge Pressure Check
Checking discharge pressure.
Check No.8
Procedure for Check No. 8.
6.1.8 Outdoor Unit Fan System Check (With DC Motor)
Checking the outdoor unit fan system.
Check No.9
Procedure for Check No. 9.
6.1.9 Power Supply Waveforms Check
Checking power supply waveforms.
Check No.10
Procedure for Check No. 10.
6.1.10 Inverter Units Refrigerant System Check
Checking the inverter units refrigerant system.
Check No.11
Procedure for Check No. 11.
6.1.11 Capacitor Voltage Check
Checking the main circuit electrolytic capacitor voltage.
Check No.12
Procedure for Check No. 12.
6.1.12 Power Transistor Check
Checking the power transistor.
Check No.13
Procedure for Check No. 13.
6.1.13 Main Circuit Electrolytic Capacitor Check
Checking the main circuit electrolytic capacitor.
Check No.14
Procedure for Check No. 14.
6.1.14 Turning Speed Pulse Input on the Outdoor Unit PCB Check
Checking turning speed pulse input on the outdoor unit PCB.
Check No.15
Procedure for Check No. 15.
6.1.15 Hall IC Check
Checking the Hall IC.
Check No.16
Procedure for Check No. 16.
Part 7 Removal Procedure
Step-by-step guide for removing unit components.
1. Outdoor Unit (80 / 90 Class)
Removal procedures for outdoor units (80/90 class).
1.1 Removal of Outer Panels
Procedure to remove outer panels.
1.2 Removal of Propeller Fans
Procedure to remove propeller fans.
1.3 Removal of Electrical Box
Procedure to remove the electrical box.
1.4 Removal of PCB
Procedure to remove the Printed Circuit Board (PCB).
1.5 Removal of Fan Motor
Procedure to remove the fan motor.
1.6 Removal of Electronic Expansion Valve and Thermistor
Procedure to remove EV and thermistor.
1.7 Removal of Sound Insulation and Reactor
Procedure to remove sound insulation and reactor.
1.8 Removal of Shunt
Procedure to remove the shunt.
1.9 Removal of Solenoid Valve and Four Way Valve
Procedure to remove solenoid and four-way valves.
1.10 Removal of Compressor
Procedure to remove the compressor.
2. Outdoor Unit (50 / 52 / 58 / 68 / 75 Class)
Removal procedures for outdoor units (50-75 class).
2.1 Removal of Outer Panels
Procedure to remove outer panels.
2.2 Removal of Electrical BOX
Procedure to remove the electrical box.
2.3 Removal of PCB
Procedure to remove the Printed Circuit Board (PCB).
2.4 Removal of Fan Motor
Procedure to remove the fan motor.
2.5 Removal of Sound Insulation
Procedure to remove sound insulation.
2.6 Removal of Four Way Valve Coil, Solenoid Valve Coil, Electronic Expansion Valve Coil and Thermistor
Procedure to remove valve coils and thermistors.
2.7 Removal of Four Way Valve, Solenoid Valve and Shunt
Procedure to remove four-way valve, solenoid valve, and shunt.
2.8 Removal of Solenoid Valve and Shunt
Procedure to remove solenoid valve and shunt.
2.9 Removal of Compressor
Procedure to remove the compressor.
Part 8 Others
Miscellaneous information and settings.
1. Others
General other topics.
1.1 Test Run from the Remote Controller
Procedure for test running using the remote controller.
Trial Operation and Testing
Steps for trial operation and testing.
For Heat pump
Trial operation guidelines for heat pump models.
For Cooling operation in case of low ambient temperature
Trial operation for cooling in low ambient temperatures.
Trial operation from Remote Controller
Steps for trial operation using the remote controller.
1.2 Jumper Settings
Information on jumper settings.
1.2.1 When Two Units are Installed in One Room
Settings for two indoor units in one room.
PCB in the indoor unit
PCB jumper settings in the indoor unit.
Wireless remote controller (in case of wall mounted type)
Jumper settings for wireless remote controller.
1.2.2 Jumper Setting
Specific jumper settings.
1.2.3 Adjusting the Angle of the Intelligent Eye Sensor
How to adjust the Intelligent Eye sensor angle.
Wall Mounted Type 25 / 35 Class Only
Sensor angle adjustment for specific wall-mounted models.
Caution
Cautions regarding Intelligent Eye sensor handling.
Part 9 Appendix
Appendix containing diagrams and supplementary information.
1. Piping Diagrams
Diagrams illustrating the piping system.
1.1 Indoor Units
Piping diagrams for indoor units.
1.1.1 Wall Mounted Type
Piping diagrams for wall-mounted indoor units.
1.1.2 Duct Connected Type
Piping diagrams for duct-connected indoor units.
1.1.3 Floor / Ceiling Suspended Dual Type
Piping diagrams for floor/ceiling suspended dual units.
1.1.4 Floor Standing Type
Piping diagrams for floor-standing indoor units.
1.2 Outdoor Units
Piping diagrams for outdoor units.
1.2.1 Cooling Only
Piping diagrams for outdoor units (cooling only).
1.2.2 Heat Pump
Piping diagrams for outdoor units (heat pump).
2. Wiring Diagrams
Diagrams illustrating the wiring system.
2.1 Indoor Units
Wiring diagrams for indoor units.
2.1.1 Wall Mounted Type
Wiring diagrams for wall-mounted indoor units.
2.1.2 Duct Connected Type
Wiring diagrams for duct-connected indoor units.
2.2 Outdoor Units
Wiring diagrams for outdoor units.
2.2.1 Cooling only
Wiring diagrams for outdoor units (cooling only).
2.2.2 Heat Pump
Wiring diagrams for outdoor units (heat pump).
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