Fujitsu Airstage VR-II AUUA12TLAV User Manual

SERVICE MANUAL
208/230V 60Hz

Fujitsu Airstage VR-II AUUA12TLAV Specifications

General

Brand	Fujitsu
Model	Airstage VR-II AUUA12TLAV
Category	Air Conditioner
Language	English

Summary

1. TEST RUN

1-1 Execution Procedures and Precautions

Details essential procedures and precautions for system installation, refrigerant handling, and piping.

1-2 Pre-Power On Checks

Lists critical inspection items for power source and unit settings before system power-up.

1-3 Post-Power On Checks

Outlines checks after power application, focusing on error indications and operational status.

1-4 Test Run Operation

1-5 Test Run Control

2. OUTDOOR UNIT OPERATION CONTROL

2-1 Refrigerant Circuit

Diagram and description of refrigerant circuit components and their functions within the outdoor unit.

2-3 Heat Recovery Operation Control

2-4 Compressor Operation

Details compressor operation modes: start/stop conditions, speed control, and capacity management.

2-5 Heat Exchanger Capacity Control

2-7 Expansion Valve Control

2-8 Special Operation Modes

2-9 Protective Functions

Details protective functions: discharge temp, high pressure, low pressure, and sensor protections.

3. INDOOR UNIT OPERATION

3-2 Master Control

3-4 Electronic Expansion Valve Control

3-6 Unit Functions

4. TROUBLE SHOOTING

4-2 Abnormal Operation Troubleshooting

Covers abnormal operation, error code display, and troubleshooting steps for various error conditions.

4-3 Network Communication Abnormal

4-4 Backup Operation

5. APPENDING DATA (UNIT)

5-1 Refrigerant Circuit

Diagram and description of refrigerant circuit components and their functions within the outdoor unit.

5-2 Wiring Diagrams

6. DISASSEMBLY PROCESS

6-1 Indoor Unit Disassembly

6-2 Outdoor Unit Disassembly

Provides procedures for disassembling outdoor units: panel removal, control box access, and component layouts.