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Daikin Manuals
Heat Pump
RWEQ144TA
Service manual
Daikin RWEQ144TA Service Manual
Vrv water cooled system
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Contents
Table of Contents
Troubleshooting
Bookmarks
Table of Contents
Caution Items
Warnings and Cautions Regarding Safety of Workers
Warnings and Cautions Regarding Safety of Users
Icons Used
Revision History
Table of Contents
Features and Benefits
Model Names
Outside Units
Branch Selector Unit
Indoor Unit
Air Treatment Equipment
External Appearance
Outside Units
Branch Selector Unit
Indoor Unit
Air Treatment Equipment
Combination of Outside Units
Capacity Range
Connection Ratio
Indoor Unit Connection Capacity
Limitation of Capacity Index for Heat Recovery
Specifications
Rweq-Tatju, Rweq-Tatja, Rweq-Tbtja
Part 1 General Information
Rweq-Taydu, Rweq-Tayda, Rweq-Tbyda
Rweq-Taycu, Rweq-Tbycu
Refrigerant Circuit Part
Refrigerant Circuit (Piping Diagrams)
Outside Unit
Branch Selector Unit
Indoor Unit
Outdoor-Air Processing Unit
Functional Parts Layout
Front View
Right View
Refrigerant Flow for each Operation Mode
In Case of Heat Pump Connection
Oil Return Operation
In Case of Heat Recovery Connection (Single Outside Unit Installation)
Applicable Models
Names and Functions
Brc1E73
Service Check Function
Part 3 Remote Controller
Brc1H71W
Button Locations and Descriptions
Overview of Screens
Information Screen
Wireless Remote Controller
Main/Sub Setting
Brc1E73
Field Settings
Brc1H71W
When Wireless Remote Controller Is Used Together
Address Setting for Wireless Remote Controller
Centralized Control Group No. Setting
Brc1E73
Brc1H71W
Wireless Remote Controller
Group No. Setting Example
Service Settings Menu, Maintenance Menu
Brc1E73
Service Settings Menu
Maintenance Menu
Administrator Menu, Installer Menu
Brc1H71W
Function General
Operation Mode
Normal Operation
Stop Control
When System Is in Stop Control
Stop Control of Slave Units While Master Unit Is in Operation on Multi Outside Unit System
Abnormal Stop
Standby Control
Restart Standby
Crankcase Heater Control
Startup Control
Startup Control in Cooling
Startup Control in Heating
Normal Control
Compressor PI Control
Cooling Operation
Heating Operation
Injection Control
Compressor Operation Frequency Steps
Electronic Expansion Valve Control
Heat Exchange Mode in Heating Operation or Simultaneous Cooling/Heating Operation
Protection Control
High Pressure Protection Control
Low Pressure Protection Control
Discharge Pipe Protection Control
Suction Pipe Protection Control
Inverter Protection Control
Cooling Fan Control
Special Control
Oil Return Control
Oil Return Control of Water Heat Exchanger
Pump down Residual Control
Refrigerant Drift Prevention
Other Control
Outside Unit Rotation
Exhaust Heat Cancellation Operation
Water Quantity Control
Backup Operation
Demand Operation
Outline of Control (Indoor Unit)
Operation Flowchart
Set Temperature and Control Target Temperature
Remote Controller Thermistor
Thermostat Control
Dry Operation
Thermostat Control with Operation Mode Set to AUTO
Drain Pump Control
Control of Electronic Expansion Valve
Freeze-Up Prevention Control
List of Swing Flap Operations
Hot Start Control (in Heating Operation Only)
Louver Control for Preventing Ceiling Dirt
Heater Control (Except FXTQ-TA, FXTQ-TB Models)
Overload Control
Heater Control (FXTQ-TA, FXTQ-TB Models)
3-Step Thermostat Processing (FXTQ-TA, FXTQ-TB Models)
Fan Control (Heater Residual) (FXTQ-TA, FXTQ-TB Models)
Interlocked with External Equipment (FXTQ-TA, FXTQ-TB Models)
Field Settings with Remote Controller
Wired Remote Controller
Wireless Remote Controller
Simplified Remote Controller
List of Field Settings for Indoor Unit
Applicable Field Settings
Details of Field Settings for Indoor Unit
Setting Procedure
External ON/OFF Input
Factory Setting
Auto Restart after Power Failure
Airflow Direction Setting
Room Temperature Display
List of Field Settings for Outdoor-Air Processing Unit
Operation Control Mode
Field Setting from Outside Unit
DIP Switch Settings
Accessing the BS Buttons on the PCB
Operating the BS Buttons and DIP Switches on the PCB
Access Mode
Connecting of the Optional PC Configurator Cable to the Outside Unit
Monitoring Function and Field Settings
Detailed Explanation of Setting Modes
Cool/Heat Mode Changeover
Heat Pump System
Heat Recovery System
Tightening Torque
Operation State
Operation Procedure
Field Settings for Branch Selector Unit
Field Settings for Single Branch Selector Unit
Field Settings for Multi Branch Selector Unit (Standard Series)
Field Settings for Multi Branch Selector Unit (Flex Series)
How to Check Miswiring for Multi Branch Selector Unit
Test Operation
Procedure and Outline
Check Work Prior to Turn Power Supply on
Turn Power on
Check Operation
Error Code
Symptom-Based Troubleshooting
Indoor Unit Overall
With Infrared Presence/Floor Sensor
Error Code Via Remote Controller
Brc1E73
Brc1H71W
Wireless Remote Controller
Troubleshooting by Error Code
Error Codes and Descriptions
Error Codes (Sub Codes)
Troubleshooting
External Protection Device Abnormality
Applicable Models
Indoor Unit Control PCB Abnormality
Drain Level Control System Abnormality
Indoor Fan Motor Lock, Overload
Indoor Fan Motor Abnormality
Overload/Overcurrent/Lock of Indoor Fan Motor
Blower Motor Not Running
Error Reset
Indoor Fan Motor Status Abnormality
Low Indoor Airflow
Swing Flap Motor Abnormality
Power Supply Voltage Abnormality
Blower Motor Stops for Over/Under Voltage
Electronic Expansion Valve Coil Abnormality, Dust Clogging
Drain Level above Limit
Self-Cleaning Decoration Panel Abnormality
Defective Capacity Setting
Transmission Abnormality between Indoor Unit Control PCB and Fan PCB
Applicable Models
Blower Motor Communication Error
Thermistor Abnormality
Combination Error between Indoor Unit Control PCB and Fan PCB
Capacity Setting Abnormality
Blower Motor HP Mismatch
Indoor Blower Does Not Have Required Parameters to Function
Remote Sensor Abnormality
Humidity Sensor System Abnormality
Infrared Presence/Floor Sensor Error
Diagnosis Procedure
Remote Controller Thermistor Abnormality
Outside Unit PCB Abnormality
Detection of Ground Leakage by Leak Detection Circuit
Missing of Ground Leakage Detection Core
Activation of High Pressure Switch
Activation of Low Pressure Sensor
Compressor Motor Lock
Electronic Expansion Valve Coil Abnormality
Discharge Pipe Temperature Abnormality
Suction Pipe Temperature Abnormality
Refrigerant Overcharged
Branch Selector Unit Electronic Expansion Valve Abnormality
Harness Abnormality (between Outside Unit Main PCB and Inverter PCB)
Applicable Models
Thermistor System Abnormality
Water System Abnormality
High Pressure Sensor Abnormality
Low Pressure Sensor Abnormality
Inverter PCB Abnormality
Reactor Temperature Rise Abnormality
Inverter Radiation Fin Temperature Rise Abnormality
Compressor Instantaneous Overcurrent
Compressor Overcurrent
Compressor Startup Abnormality
Transmission Error between Inverter PCB and Outside Unit Main PCB
Power Supply Voltage Imbalance
Reactor Temperature Abnormality
Inverter Radiation Fin Temperature Abnormality
Field Setting Abnormality after Replacing Outside Unit Main PCB or Combination of PCB Abnormality
Refrigerant Shortage Alert
Reverse Phase, Open Phase
Power Supply Insufficient or Instantaneous Failure
Check Operation Not Executed
Transmission Error between Indoor Units and Outside Units, Open Phase in Power Supply Wiring
Transmission Error between Remote Controller and Indoor Unit
Transmission Error between Outside Units
Transmission Error between Main and Sub Remote Controllers
Transmission Error between Indoor and Outside Units in the same System
Improper Combination of Indoor, Branch Selector and Outside Units
Incorrect Electric Heater Capacity Setting
Address Duplication of Centralized Controller
Transmission Error between Centralized Controller and Indoor Unit
System Not Set yet
System Abnormality, Refrigerant System Address Undefined
Check
High Pressure Check
Low Pressure Check
Superheat Operation Check
Power Transistor Check
Wet Operation Check
Refrigerant Overcharge Check
Refrigerant Shortage Check
Vacuuming and Dehydration Procedure
Thermistor Check
Pressure Sensor Check
Broken Wire Check of the Relay Wires
Fan Motor Connector Check (Power Supply Cable)
Fan Motor Connector Check (Signal Cable)
Electronic Expansion Valve Coil Check
Fan Motor Connector Check for FXTQ-TA, FXTQ-TB
High Voltage
Motor Checks
Wiring Diagrams
Outside Unit
Branch Selector Unit
Indoor Unit
Air Treatment Equipment
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Heat Recovery 60 Hz
Table of
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Table of Contents
Troubleshooting
Symptom-based Troubleshooting
293
Troubleshooting by Error Code
300
Error Codes (Sub Codes)
302
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