Daikin SkyAir RZQ18PVJU User Manual (English)

gardnerjoannaAug 9, 2025

Why is my Daikin Air Conditioner not cooling or heating air well?

T
Tracy RosarioAug 9, 2025
If your Daikin Air Conditioner isn't cooling or heating air effectively, there might be several reasons: * Check for any obstructions blocking the air inlet or outlet of either the indoor or outdoor unit and remove them. * Clean the air filters if they are clogged. * Ensure that the outdoor unit is not enclosed; if it is, remove the enclosure. * Verify that the temperature is set correctly. * Adjust the airflow rate if it's set to "LOW". * Correct the direction of air diffusion if it's improper. * Close any open windows or doors. * Use curtains or shades to block direct sunlight. * Consider if the air conditioning load is too high for the number of people in the room.

Dr. Glenn LewisAug 18, 2025

What to do if my Daikin SkyAir RZQ18PVJU Air Conditioner starts operation but makes an immediate stop?

C
Christopher ThomasAug 18, 2025
If your Daikin Air Conditioner starts but stops immediately, it could be due to: * A blocked air inlet or outlet on either the indoor or outdoor unit. Clear any obstacles. * Clogged air filters. Clean the air filters to ensure proper airflow.

Joseph EdwardsAug 28, 2025

How to fix Daikin SkyAir RZQ18PVJU Air Conditioner that does not start at all?

A
acevedojasonAug 28, 2025
If your Daikin Air Conditioner system doesn't start at all, it might be due to: * Blown fuse(s). Turn off the power supply and replace the fuse(s). * Cutout breaker(s). If any breaker knob is in the OFF position, turn ON the power supply. However, if a circuit breaker knob is in the tripped position, do not attempt to turn ON the power supply.

Brand	Daikin
Model	SkyAir RZQ18PVJU
Category	Air Conditioner
Language	English

Brand

Daikin

Model

SkyAir RZQ18PVJU

Daikin SkyAir RZQ18PVJU User Manual

Table of Contents

Questions and Answers:

Daikin SkyAir RZQ18PVJU Specifications

Summary

Part 1 General Information

1. Safety Considerations

1.1 Safety Considerations for Repair

1.2 Safety Considerations for Users

Part 2 Refrigerant Circuit

1. Refrigerant Circuit

1.1 RZR18 / 24 / 30PVJU RZQ18 / 24 / 30PVJU(9)

1.2 RZR36 / 42PVJU RZQ36 / 42PVJU(9)

Part 3 Function

1. Operation Mode

2. Basic Control

2.1 Normal Operation

2.2 Compressor PI Control

2.3 Electronic Expansion Valve PI Control

3. Special Control

3.1 Startup Control

3.2 Oil Return Operation

3.3 Defrosting Operation

4. Protection Control

4.1 High Pressure Protection Control

4.2 Low Pressure Protection Control

4.3 Discharge Pipe Protection Control

4.4 Inverter Protection Control

6. Outline of Control (Indoor Unit)

6.1 Drain Pump Control

6.4 Freeze-up Prevention

6.6 Hot Start Control (In Heating Operation Only)

Part 4 Test Operation

1. Test Operation

1.1 Procedure and Outline

1.1.1 Check Work Prior to Turn Power Supply ON

1.1.2 Turn Power On

1.1.3 Check Operation

1.1.4 Confirmation on Normal Operation

1.2 Operation when Power is Turned ON

1.2.1 When Turning ON Power First Time

1.2.2 When Turning ON Power the Second Time and Subsequent

1.2.3 When an Indoor Unit or Outdoor Unit has been Added, or Indoor or Outdoor Unit PCB has been Changed

3. Field Setting

3.1 Field Setting from Remote Controller

3.1.1 Wired Remote Controller

3.1.2 Wireless Remote Controller

3.2 Field Setting from Remote Controller (Indoor Unit)

3.2.1 Setting Contents and Code No.

3.3 Field Setting from Outdoor Unit

3.3.1 Setting by DIP Switches

3.4.6 Check Operation

Part 5 Service Diagnosis

1. Symptom-based Troubleshooting

2. Troubleshooting by Remote Controller

2.1 The INSPECTION / TEST Button

2.1.1 BRC1D71

2.2 Self-diagnosis by Wired Remote Controller

2.2.1 BRC1D71

2.2.2 BRC1E71

2.3 Self-diagnosis by Wireless Remote Controller

2.4 Inspection Mode

2.5 Remote Controller Service Mode

2.5.1 BRC1D71

2.5.2 BRC1E71

2.6 Error Codes and Description

3. Troubleshooting by Indication on the Remote Controller

3.1 External Protection Device Abnormality

3.2 PCB Abnormality

3.3 Drain Water Level System Abnormality

3.4 Indoor Unit Fan Motor Abnormality

3.5 Swing Flap Motor Abnormality / Lock

3.6 Electronic Expansion Valve Coil Abnormality

3.7 Drain System Abnormality

3.8 Capacity Setting Device Abnormality

3.9 Heat Exchanger (Liquid pipe) Thermistor Abnormality

3.10 Heat Exchanger (Gas Pipe) Thermistor Abnormality

3.11 Suction Air Thermistor Abnormality

3.12 Remote Sensor Abnormality

3.13 Room Temperature Thermistor in Remote Controller Abnormality