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Daikin Aircond Error Codes Malaysia: Complete Troubleshooting Guide

Daikin is one of the most popular aircond brands in Malaysia, known for reliability and energy efficiency. But even Daikin units can develop problems, and when they do, they display error codes to help identify the issue.

We know the sinking feeling of seeing that green light blinking when you just want to cool down after a jam on the LDP. Most homeowners in Puchong and KL immediately assume the worst, fearing a massive bill.

We have found that understanding these codes can save you from being overcharged for a simple fix.

The Secret “Cancel Button” Trick (How to Read Codes)

Most Daikin wall-mounted units in Malaysia don’t display the code on the unit itself; they communicate through your remote.

We use this exact method to diagnose units before we even open the toolbox.

Step-by-Step Diagnosis:

1. Locate the “Cancel” button on your remote (usually in the timer section).
2. Hold it down for 5 seconds until you see “00” blinking on the remote’s screen.
3. Press “Cancel” repeatedly. You will hear a short beep for every code that isn’t the problem.
4. Listen for the long beep. When you hear a sustained, continuous beep, stop. The code showing on the screen is your error.

Most Common Daikin Error Codes in Malaysia

We see these five codes more than any others in the Klang Valley.

U4 - Communication Error

What it means: The indoor and outdoor units have stopped talking to each other.

We often trace this back to the “Malaysian special”—geckos (lizards) or ants shorting out the terminal block in the outdoor unit. It can also be caused by loose wiring from vibration or a power supply fault.

What to try:

1. Switch off the main isolator (power supply) for at least 5 minutes to reset the system.
2. Turn it back on and wait 3 minutes.
3. Inspect visible wiring near the outdoor unit for bite marks or damage.

Need a technician? Yes, if the reset fails. This usually involves repairing burnt wiring or replacing the outdoor PCB.

A3 - Drain Level Error

What it means: The system thinks the drain pan is about to overflow.

We find this is frequently caused by a buildup of “jelly” (bio-slime) in the drainage pipe, which thrives in our humid tropical climate.

What to try:

1. Check the end of your drain pipe (usually in the bathroom or balcony) for blockages.
2. Use a wet/dry vacuum to suck the end of the drain pipe to clear obstructions.
3. Clean the indoor filters to reduce dust mixing with condensation.

Need a technician? If vacuuming the pipe doesn’t work, you need a chemical wash to flush the jelly from the internal tray.

E7 - Fan Motor Error

What it means: The DC fan motor on the outdoor unit has stopped spinning or is obstructed.

We typically see this happen when the outdoor unit is blocked by items on the balcony or if the motor has simply worn out from age.

What to try:

1. Ensure no objects are leaning against the outdoor unit.
2. Use a stick to gently spin the fan blade (with power OFF) to see if it moves freely.
3. Listen for grinding noises during startup.

Need a technician? Yes. Replacing a DC fan motor is a standard repair but requires specific parts (approx. RM250-RM450 depending on the model).

L5 - Inverter Instantaneous Overcurrent

What it means: The outdoor unit is drawing too much power, triggering a safety shutdown.

We often call this the “scary code” because other contractors might immediately tell you the compressor is dead. However, in our experience, it is often just the inverter PCB (board) or a dirty condenser coil, not the expensive compressor itself.

What to try:

1. Check if the outdoor unit’s fins are clogged with dust or pet hair.
2. Clear any airflow restrictions.
3. Perform a hard reset (power off for 10 minutes).

Need a technician? Absolutely. An expert needs to test the compressor resistance to rule out a board failure before you agree to an expensive compressor replacement.

E1 - PCB Error (Outdoor Unit)

What it means: The main “brain” of the outdoor unit has failed.

We see this frequently after heavy thunderstorms in Kuala Lumpur, where voltage spikes damage the sensitive electronics.

What to try:

1. Power cycle the unit.
2. Look for any burnt smell coming from the outdoor unit.

Need a technician? Yes. This requires a board replacement.

2026 Repair Cost Estimates (Puchong & KL)

Homeowners often ask us what a “fair price” is to fix these errors.

We compiled this table based on average market rates in the Klang Valley to help you budget.

Service / Part	Est. Price Range (RM)	Notes
General Inspection	RM50 - RM80	Often waived if you proceed with repair.
Chemical Wash (Wall Unit)	RM120 - RM180	Essential for A3 errors.
Gas Top-Up (R32/R410A)	RM30 - RM80	Only needed if there is a leak (rare).
PCB Board Repair	RM300 - RM600	Fixes E1, U4, L5. Depends on model.
Fan Motor Replacement	RM250 - RM450	Fixes E7, A6.
Compressor Replacement	RM1,200+	The most expensive repair.

Complete Daikin Error Code Reference

Indoor Unit Errors (A/C Series)

Code	Meaning	Severity
A0	External protection device activated	High
A1	Indoor PCB error	High
A3	Drain level abnormal (Clog/Pump)	Medium
A5	Indoor coil freeze protection	Medium
A6	Fan motor error	Medium
AH	Air filter clogged	Low
C4	Indoor coil thermistor error	Medium
C9	Room sensor error	Low

Outdoor Unit Errors (E/F/L Series)

Code	Meaning	Severity
E1	Outdoor PCB error	High
E3	High pressure protection	High
E4	Low pressure protection	High
E5	Inverter compressor overload	High
E7	Outdoor fan motor error	Medium
F3	Discharge pipe temp too high	High
F6	Refrigerant overcharge	Medium
L4	Inverter fin temp rise	High
L5	Inverter overcurrent (Compressor/PCB)	High

System Errors (U/P Series)

Code	Meaning	Severity
U0	Refrigerant shortage (Gas leak)	High
U2	Power supply error (Voltage drop/spike)	Medium
U4	Communication error (Wiring/PCB)	Medium
P4	Inverter fin thermistor error	Medium

When to DIY vs. Call a Pro

You Can Try:

• The “Hard Reset”: Turn off the main power switch (not just the remote) for 15 minutes. This clears simple logic glitches.
• Clearing the Drain: If you get an A3 error, try sucking the drain pipe end with a wet/dry vacuum.
• Cleaning Filters: Resolve AH or cooling issues by washing filters with warm soapy water.

Call a Professional:

• Persistent Electrical Errors: Codes like E1, U4, or L5 that return after a reset usually indicate physical component failure.
• Refrigerant Leaks: U0 errors require gauges to test pressure; adding gas without finding the leak is a waste of money.
• Burnt Smells: Turn off the unit immediately and do not restart it.

Prevention Tips for Malaysian Homes

We recommend these steps to extend the life of your unit in our humid environment.

1. Schedule Chemical Washes: Do this once a year. It removes the “jelly” buildup that causes A3 errors and water leaks.
2. Install a Starter/Isolator: Ensure your outdoor unit has a dedicated weatherproof switch to isolate it during lightning storms.
3. Clear the Balcony: Keep at least 50cm of space around your outdoor unit to prevent E4/L5 overheating errors.
4. Check Your Warranty: Daikin Malaysia often runs “1+2” warranty promotions (3 years parts). Check your receipt date—you might still be covered!

Daikin Warranty Information

• Compressor: 5 years (Standard for most residential models).
• General Parts: 1 year (Standard).
• Promotion Alert: If you bought your inverter unit between April 2025 and March 2026, you may be eligible for an extended 3-year parts warranty under the latest Daikin Malaysia campaign.

We always remind customers to keep their original receipt and warranty card safe, as Daikin service centers require them for claims.

Need Help With Your Daikin?

Our technicians are experienced with all Daikin models and error codes.

We can diagnose the issue and provide a clear quote before any repairs.

Diagnostic: RM50 (waived if you proceed with repair)

Learn more about our AC Repair service