Daikin 4MXS80BVMB9 User Manual

C-Series
[Applied Models]
zInverter Multi : Cooling Only
zInverter Multi : Heat Pump
Si12 - 411A

Daikin 4MXS80BVMB9 Specifications

General

Brand	Daikin
Model	4MXS80BVMB9
Category	Air conditioning
Language	English

Summary

Part 2 Specifications

1.1 Indoor Units - Cooling Only

Provides technical data for cooling-only indoor units.

1.2 Outdoor Units - Cooling Only

Provides technical data for cooling-only outdoor units.

1.3 Indoor Units - Heat Pump

Provides technical data for heat pump indoor units.

1.4 Outdoor Units - Heat Pump

Provides technical data for heat pump outdoor units.

Part 3 Printed Circuit Board Connector Wiring Diagram

1. Printed Circuit Board Connector Wiring Diagram

Illustrates PCB connector layouts for different unit types.

1.1 Wall Mounted Type 20/25/35 Class

1.2 Wall Mounted Type 50/60/71 Class

1.3 Duct Connected Type

1.4 Floor / Ceiling Suspended Dual Type

1.5 Floor Standing Type

1.6 Outdoor Units

Wiring diagram for outdoor units.

Part 4 Function and Control

1.1 Frequency Principle

1.9 Inverter Powerful Operation

2.2 Function of Thermistor

3. Control Specification

Details the system's control logic and specifications.

3.2 Frequency Control

Explains how compressor and fan frequencies are determined.

3.3 Controls at Mode Changing / Start-up

3.4 Discharge Pipe Control

3.5 Input Current Control

3.6 Freeze-up Protection Control

Describes measures to prevent indoor heat exchanger freezing.

3.7 Heating Peak-cut Control

3.10 Defrost Control

3.11 Low Hz High Pressure Limit

3.12 Electronic Expansion Valve Control

Details various control functions managed by the EV.

3.13 Malfunctions

Lists and explains system malfunctions and error codes.

3.15 Wiring-Error Check

Describes the automated wiring error detection and correction process.

Part 5 System Configuration

2.2 Safety Precautions

Crucial safety guidelines for installation and operation.

2.14 Troubleshooting

Offers guidance for diagnosing and resolving common issues.

Part 6 Service Diagnosis

1. Caution for Diagnosis

1.1 Troubleshooting with the Operation Lamp

2. Problem Symptoms and Measures

Lists common problems and their corresponding solutions.

3. Service Check Function

Explains how to use the system's diagnostic check function.

4. Code Indication on the Remote Controller

Lists and explains error codes displayed on the remote controller.

4.1 Error Codes and Description of Fault

Lists and explains error codes displayed on the remote controller.

5. Troubleshooting

Detailed troubleshooting steps for various system faults.

5.1 Indoor Units

Troubleshooting specific to indoor unit issues.

5.2 Outdoor Units

Troubleshooting specific to outdoor unit issues.

5.3 Indoor Unit PCB Abnormality

Diagnosing faults related to the indoor unit PCB.

5.4 Freeze-up Protection Control or High Pressure Control

Troubleshooting issues related to freeze-up or high pressure protection.

5.5 Fan Motor or Related Abnormality

Diagnosing fan motor and related component issues.

5.6 Thermistor or Related Abnormality (Indoor Unit)

Troubleshooting indoor unit thermistor faults.

5.7 Shutter Drive Motor / Shutter Limit Switch Abnormality

5.8 Signal Transmission Error (between Indoor and Outdoor Units)

Troubleshooting communication errors between units.

5.9 Unspecified Voltage (between Indoor and Outdoor Units)

5.10 Freeze-up Protection Control

Troubleshooting freeze-up protection activation.

5.11 OL Activation (Compressor Overload)

Diagnosing compressor overload issues.

5.12 Compressor Lock

Troubleshooting compressor lock conditions.

5.13 DC Fan Lock

Diagnosing DC fan motor lock issues.

5.14 Input Over Current Detection

Troubleshooting input over-current faults.

5.15 Four Way Valve Abnormality

Diagnosing four-way valve issues.

5.16 Discharge Pipe Temperature Control

Troubleshooting discharge pipe temperature control faults.

5.17 Position Sensor Abnormality

5.18 CT or Related Abnormality

5.19 Thermistor or Related Abnormality (Outdoor Unit)

Diagnosing outdoor unit thermistor faults.

5.20 Electrical Box Temperature Rise

Troubleshooting electrical box overheating issues.

5.21 Radiation Fin Temperature Rise

Diagnosing radiation fin overheating issues.

5.22 Output Over Current Detection

Troubleshooting output over-current faults.

5.23 Insufficient Gas

Diagnosing and addressing refrigerant shortage issues.

5.24 Low-voltage Detection

Troubleshooting low voltage conditions.

5.25 Anti-icing Function in Other Rooms / Unspecified Voltage (between Indoor and Outdoor Units)

6. Check

6.1 How to Check

6.1.1 Fan Motor Connector Output Check

6.1.2 Limit Switch Continuity Check

6.1.3 Electronic Expansion Valve Check

Detailed steps to check EV operation and coils.

6.1.4 Four Way Valve Performance Check

6.1.5 Thermistor Resistance Check

6.1.7 Discharge Pressure Check

6.1.8 Outdoor Unit Fan System Check (With DC Motor)

6.1.9 Power Supply Waveforms Check

6.1.10 Inverter Units Refrigerant System Check

6.1.11 Capacitor Voltage Check

6.1.12 Power Transistor Check

6.1.13 Main Circuit Electrolytic Capacitor Check

6.1.14 Turning Speed Pulse Input on the Outdoor Unit PCB Check

6.1.15 Hall IC Check

Part 7 Removal Procedure

1. Outdoor Unit (80 / 90 Class)

1.3 Removal of Electrical Box

1.4 Removal of PCB

1.5 Removal of Fan Motor

1.6 Removal of Electronic Expansion Valve and Thermistor

1.9 Removal of Solenoid Valve and Four Way Valve

1.10 Removal of Compressor

Procedure for safely removing the compressor.

2. Outdoor Unit (50 / 52 / 58 / 68 / 75 Class)

2.2 Removal of Electrical BOX

2.3 Removal of PCB

2.4 Removal of Fan Motor

2.6 Removal of Four Way Valve Coil, Solenoid Valve Coil, Electronic Expansion Valve Coil and Thermistor

2.7 Removal of Four Way Valve, Solenoid Valve and Shunt

2.9 Removal of Compressor

Procedure for safely removing the compressor.

Part 9 Appendix

2. Wiring Diagrams

2.1 Indoor Units

2.2 Outdoor Units