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Daikin Standard Series Service Manual
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Contents
Table of Contents
Troubleshooting
Bookmarks
Table of Contents
Table of Contents
Safety Cautions
Warnings and Cautions Regarding Safety of Workers
Warnings and Cautions Regarding Safety of Users
Used Icons
Part 1 General Information
Model Names
Indoor Unit
Outdoor Unit
Air Treatment Equipment
External Appearance
Indoor Unit
Outdoor Unit
Air Treatment Equipment
Combination of Outdoor Units
Rxlq-Tatju, Rxlq-Taydu, Rxlq-Taycu
Rxyq-Taycu
Capacity Range
Combination Ratio
Outdoor Unit Combinations
Part 2 Refrigerant Circuit
Refrigerant Circuit
Outdoor Unit
Refrigerant Circuit Part
Indoor Unit
Outdoor-Air Processing Unit
Functional Parts Layout
Rxlq72Tatju, Rxlq72Taydu, Rxlq72Taycu, Rxyq72-120Taycu
Rxlq96/120Tatju, Rxlq96/120Taydu, Rxlq96/120Taycu, Rxyq144/168Taycu
Refrigerant Flow for each Operation Mode
Cooling Operation
Heating Operation
Cooling Oil Return Operation
Defrost Heating Oil Return Operation
Part 3 Remote Controller
Applicable Models
Names and Functions
Brc1E73
Wireless Remote Controller
Main/Sub Setting
Brc1E73
Wireless Remote Controller
Centralized Control Group No. Setting
Brc1E73
Wireless Remote Controller
Group No. Setting Example
Service Mode
Brc1E73
Part 4 Functions and Control
Operation Flowchart (Outdoor Unit)
Stop Control
Stop Due to Error
When System Is in Stop Mode
Slave Unit Stops During Master Unit Operation
Standby Control
Restart Standby
Crankcase Heater Control
Startup Control
Startup Control in Cooling
Startup Control in Heating
Basic Control
Normal Operation
Compressor PI Control
Operating Priority and Rotation of Compressors
Compressor Step Control
Electronic Expansion Valve PI Control
Step Control of Outdoor Fans
Protection Control
High Pressure Protection Control
Low Pressure Protection Control
Discharge Pipe Protection Control
Compressor Body Protection Control
Inverter Protection Control
Special Control
Pump down Residual Operation
Oil Return Operation
Defrost Operation
Outdoor Unit Rotation
Other Control
Backup Operation
Demand Operation
Heating Operation Prohibition
Outline of Control (Indoor Unit)
Operation Flowchart
Set Temperature and Control Temperature
Remote Controller Thermistor
Thermostat Control
Drain Pump Control
Control of Electronic Expansion Valve
Freeze-Up Prevention
List of Swing Flap Operations
Hot Start Control (in Heating Only)
Louver Control for Preventing Ceiling Dirt
Heater Control (Except FXTQ-TA Models)
Heater Control (FXTQ-TA Models)
Step Thermostat Processing (FXTQ-TA Models)
Fan Control (Heater Residual) (FXTQ-TA Models)
Interlocked with External Equipment (FXTQ-TA Models)
Part 5 Field Settings and Test Operation
Field Settings from Remote Controller
Wired Remote Controller
Wireless Remote Controller
Simplified Remote Controller
List of Field Settings for Indoor Unit
Details of Field Settings for Indoor Unit
List of Field Settings for Outdoor-Air Processing Unit
Setting of Operation Control Mode
Field Setting from Outdoor Unit
DIP Switch Setting
Accessing the BS Buttons on the Logic Board
Operating the BS Buttons and DIP Switches on the Logic Board
Connecting of the Optional PC Configurator Cable to the Outdoor Unit
Monitoring Function and Field Settings
Setting of Night-Time Low Noise Operation and Demand Operation
Test Operation
Checks before Test Operation
Checkpoints
Part 6 Service Diagnosis
Symptom-Based Troubleshooting
Indoor Unit Overall
With Optional Infrared Presence/Floor Sensor
Wired Remote Controller
Wireless Remote Controller
Error Codes and Descriptions
Error Codes - Sub Codes
Troubleshooting by Error Code
External Protection Device Abnormality
Indoor Unit 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
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
Capacity Determination Device Abnormality
Transmission Abnormality between Indoor Unit PCB and Fan PCB
Blower Motor Communication Error
Thermistor Abnormality
Combination Error between Indoor Unit PCB and Fan PCB
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
Remote Controller Thermistor Abnormality
Outdoor Unit PCB Abnormality
Detection of Ground Leakage by Leak Detection Circuit
Missing of Ground Leakage Detection Core
Actuation of High Pressure Switch
Actuation of Low Pressure Sensor
Inverter Compressor Motor Lock
Compressor Damage Alarm
Outdoor Fan Motor Abnormality
Electronic Expansion Valve Coil Abnormality
Discharge Pipe Temperature Abnormality
Wet Alarm
Refrigerant Overcharged
Harness Abnormality (between Outdoor Unit Main PCB and Inverter PCB)
Outdoor Fan Motor Signal Abnormality
Outdoor Fan PCB Abnormality
Thermistor Abnormality
High Pressure Sensor Abnormality
Low Pressure Sensor Abnormality
Inverter PCB Abnormality
Momentary Power Failure During Test Operation
Reactor Temperature Rise Abnormality
Inverter Radiation Fin Temperature Rise Abnormality
Inverter Compressor Instantaneous Overcurrent
Inverter Compressor Overcurrent
Inverter Compressor Startup Abnormality
Transmission Error between Inverter PCB and Outdoor Unit Main PCB
Power Supply Voltage Imbalance
Reactor Surface Thermistor Abnormality
Inverter Radiation Fin Temperature Abnormality
Field Setting after Replacing Outdoor Unit Main PCB Abnormality or Combination of PCB Abnormality
Refrigerant Shortage
Reverse Phase, Open Phase
Power Supply Insufficient or Instantaneous Abnormality
Check Operation Not Executed
Transmission Error between Indoor Units and Outdoor Units
Transmission Error between Remote Controller and Indoor Unit
Transmission Error between Outdoor Units
Transmission Error between Main and Sub Remote Controllers
Transmission Error between Indoor and Outdoor Units in the same System
Improper Combination of Indoor and Outdoor Units, Indoor Units and Remote Controller
Incorrect Electric Heater Capacity Setting
Address Duplication of Centralized Control Equipment
Transmission Error between Centralized Control Equipment 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
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
Part 7 Appendix
Wiring Diagrams
Outdoor Unit
Indoor Unit
Air Treatment Equipment
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Quick Links
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Outdoor Unit
2
Error Codes and Descriptions
Download this manual
Service
Manual
Aurora Series
RXLQ72-240TATJU
RXLQ72-240TAYDU
RXLQ72-240TAYCU
RXYQ72-384TAYCU
Heat Pump 60 Hz
SiUS341802E
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Table of Contents
Troubleshooting
Symptom-based Troubleshooting
158
Troubleshooting by Error Code
180
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