Daikin VRV IV-S RXTQ-TAVJU Series User Manual

Service
Manual
SiUS331604E
RXTQ36/48/60TAVJU
Heat Pump 60 Hz

Daikin VRV IV-S RXTQ-TAVJU Series Specifications

General

Type	Heat Pump
Series	VRV IV-S
Model	RXTQ-TAVJU
Refrigerant	R-410A
Indoor Unit Type	Ceiling Cassette, Wall Mounted
Dimensions (Indoor Unit)	Varies by model
Dimensions (Outdoor Unit)	Varies by model
Operating Temperature Range (Cooling)	-5°C to 46°C
Power Supply	208-230V, 60Hz
Maximum Height Difference	50m

Summary

Part 2 Refrigerant Circuit

1. Refrigerant Circuit

Details the refrigerant circuit components for specific models.

2. Functional Parts Layout

6.11 Heater Control (FXTQ)

6.11.1 Auxiliary Heater Control

6.11.2 Heat Pump Lockout Mode

Part 5 Field Setting

1. Test Operation

Outlines the procedure for initial test operation after installation.

2. Field Setting from Remote Controller

Details how to configure settings using the wired remote controller.

Part 6 Service Diagnosis

1. Servicing Items to be Confirmed

Lists initial checks and verification steps before starting service.

2. Symptom-based Troubleshooting

Provides common symptoms and their potential causes and countermeasures.

Part 4 Functions and Control

6.9 Freeze-up Prevention

6.10 Heater Control (Optional PCB KRP1B series is required.)

2.5 Field Setting of Operation Control Mode

2.5.1 Contents of Control Modes

2.5.2 How to Select Operation Mode

3. Field Setting from Outdoor Unit

3.1 Capacity Setting

Sets the capacity class using an adaptor for specific outdoor units.

3.2 Setting Mode and Monitor Mode

3.3 Setting Mode 1

3.4 Setting Mode 2

3.5 Monitor Mode

3.6 Setting of Low Noise Operation and Demand Operation

3.7 Setting of Refrigerant Recovery Mode

Operation procedure

Steps for setting and performing refrigerant recovery operation.

3.8 Setting of Vacuuming Mode

Operating procedure

Steps for performing vacuuming operation and setting the mode.

3.9 Check Operation

Unit stopping

Procedure to stop the unit and initiate check operation.

4. Troubleshooting by Error Code

4.1 External Protection Device Abnormality

Details troubleshooting for external protection device abnormalities (Error Code A0).

4.2 Indoor Unit PCB Abnormality

Details troubleshooting for indoor unit PCB abnormalities (Error Code A1).

4.3 Drain Level Control System (S1L) Abnormality

Details troubleshooting for drain level control system abnormalities (Error Code A3).

4.5 Indoor Fan Motor Abnormality

Troubleshoots indoor fan motor abnormalities for FXDQ/FXHQ models (Error Code A6).

4.5.2 Indoor Fan Motor Abnormality (FXMQ15-54PB)

Troubleshoots indoor fan motor abnormalities for FXMQ models (Error Code A6).

4.12 Transmission Abnormality (between Indoor Unit PCB and Fan PCB)

Troubleshoots transmission errors between indoor unit and fan PCBs (Error Code C1).

4.13 Thermistor Abnormality

Details troubleshooting for thermistor abnormalities (Error Codes C4, C5, C9, CA).

4.14 Combination Abnormality (between Indoor Unit PCB and Fan PCB)

Troubleshoots combination errors between indoor unit and fan PCBs (Error Code C6).

4.15 Remote Sensor Abnormality

Details troubleshooting for remote sensor abnormalities (Error Code C9).

4.17 Infrared Presence/Floor Sensor Error

Details troubleshooting for infrared presence/floor sensor errors (Error Code CE).

4.16 Humidity Sensor System Abnormality

Troubleshoots humidity sensor system abnormalities (Error Code CC).

4.19 Outdoor Main PCB Abnormality

Details troubleshooting for outdoor main PCB abnormalities (Error Code E1).

4.20 Activation of High Pressure Switch

Troubleshoots errors related to the activation of the high pressure switch (Error Code E3).

4.21 Activation of Low Pressure Sensor

Troubleshoots errors related to low pressure sensor activation (Error Code E4).

4.22 Inverter Compressor Motor Lock

Details troubleshooting for inverter compressor motor lock (Error Code E5).

4.23 Outdoor Fan Motor Abnormality

Troubleshoots outdoor fan motor abnormalities (Error Code E7).

4.24 Electronic Expansion Valve Coil Abnormality, Dust Clogging

Troubleshoots electronic expansion valve coil issues and dust clogging (Error Code A9).

4.25 Discharge Pipe Temperature Abnormality

Details troubleshooting for discharge pipe temperature abnormalities (Error Code F3).

4.26 Refrigerant Overcharged

Troubleshoots errors related to refrigerant overcharging (Error Code F6).

4.27 Thermistor Abnormality

Details troubleshooting for various thermistor abnormalities (Error Codes H9, J3, J5, J6, J7, J9).

4.28 High Pressure Sensor Abnormality

Troubleshoots high pressure sensor abnormalities (Error Code JA).

4.29 Low Pressure Sensor Abnormality

Details troubleshooting for low pressure sensor abnormalities (Error Code JC).

4.30 PCB (for Inverter Compressor) Abnormality

Troubleshoots abnormalities related to the inverter compressor PCB (Error Code L1).

4.31 Radiation Fin Temperature Rise Abnormality

Details troubleshooting for radiation fin temperature rise (Error Code L4).

4.32 Inverter Compressor Instantaneous Overcurrent

Troubleshoots instantaneous overcurrent in the inverter compressor (Error Code L5).

4.33 Inverter Compressor Overcurrent

Details troubleshooting for inverter compressor overcurrent (Error Code L8).

4.34 Inverter Compressor Startup Abnormality

Troubleshoots inverter compressor startup abnormalities (Error Code L9).

4.35 Transmission Error (Between Microcomputers on the Outdoor Main PCB)

Troubleshoots transmission errors between microcomputers on the outdoor main PCB (Error Code LC).

4.36 Inverter Circuit Capacitor High Voltage

4.37 Radiation Fin Thermistor Abnormality

4.39 Power Supply Insufficient or Instantaneous Abnormality

4.40 Check Operation Not Executed

4.41 Transmission Error between Indoor Units and Outdoor Units

4.42 Transmission Error between Remote Controller and Indoor Unit

4.43 Transmission Error between Main and Sub Remote Controllers

4.44 Transmission Error between Indoor and Outdoor Units in the Same System

4.45 Improper Combination of Indoor and Outdoor Units, Indoor Units and Remote Controller

4.46 Address Duplication of Centralized Controller

4.47 Transmission Error between Centralized Controller and Indoor Unit

4.50 Defective PCB

4.51 Transmission Error (between Centralized Controllers)

4.52 Poor Centralized Controller Combination

4.53 Address Duplication, Poor Setting

4.54 The Operation Lamp Blinks

4.55 Central Control Indicator Lamp Blinks (One blink)

4.56 Central Control Indicator Lamp Blinks (Two blinks)

4.57 Check

CHECK 11 Thermistor Resistance / Temperature Characteristics

Thermistor type of indoor units

Thermistor type of outdoor units

Table 2 Thermistor Resistance / Temperature Characteristics

CHECK 12 Voltage measurement Point

High pressure sensor

Low pressure sensor

Pressure sensor and voltage characteristics

CHECK 13 Broken wire check for the connecting wires

1. Procedure for checking outdoor-outdoor unit transmission wiring for broken wires

2. Procedure for checking indoor-outdoor unit transmission wiring for broken wires

CHECK 14 Master unit centralized connector setting table

Centralized controller connection pattern

Setting of master unit centralized setting connector

CHECK 15 Master-slave unit setting table

Combination of intelligent Touch Controller and Centralized Remote Controller

Fan motor check

Part 7 Appendix

1. Wiring Diagrams

1.1 Outdoor Unit

1.2 Indoor Unit

1.3 Air Treatment Equipment