My Daikin aircon won’t turn on
Searching online for “Daikin aircon wont turn on” or “Daikin wont turn on” in order to figure out the fix necessitates narrowing down the possible source of the issue first. To begin troubleshooting, you will need to ponder these three questions:
- Is your Daikin air conditioning system single split or multi-split type?
- How many lights cannot turn on?
- Are the lights blinking while your Daikin aircon refuses to turn on?
There are many possible reasons why your Daikin air conditioner won’t turn on. Common causes include refrigerant leaks or low refrigerant levels, frozen evaporator coils, thermostat issues, overheating problems, dirty or clogged air filters, electrical supply or circuit problems, and short cycling issues.
Refrigerant-related issues and circuit problems require professional servicing, as DIY fixes are not possible for leaking pipes, refrigerant refills, damaged wires, or malfunctioning PCBs. Frozen evaporator coils, often linked to refrigerant issues, are caused by pressure differentials inside the refrigerant pipe, leading to low pressure and frozen coils.
Overheating problems, however, are more complex and require a technician. Ensure nothing blocks airflow to the outdoor unit. Overheating may result from added heat sources, insufficient cooling capacity, open windows or doors, or poor insulation. Persistent issues could indicate a compressor-related problem.
When troubleshooting issues like “my Daikin won’t turn on,” start by narrowing down the possible causes. Consider these three questions to guide your investigation.
A Daikin aircon that wont turn on has three possible causes. This case normally involves the air conditioner staying off and there is no way to turn it back on. Manually turning it on and pressing the power button on the remote control do not work.
- There is a defect in the wiring between the isolator and the condenser.
- The isolator wire is broken.
- There is a defect in the wiring between the isolator and the MCB inside the DB box
The air conditioner’s isolator wire, which is also known as the isolator switch, is a safety device which cuts off the power supply to the circuit connected to the air conditioner. During aircon maintenance or an emergency situation, the switch can be easily disconnected to protect electricians and HVAC technicians servicing the aircon. When there is an electrical fault, the isolator switch also helps prevent damage to the other circuits in the house. The MCB, on the other hand, automatically switches off when there is a power spike or an overload of the capacity to which the MCB has been rated to handle. Unlike an isolator switch, an MCB is designed to automatically trip during a short circuit to effectively protect the devices connected to its circuit.
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This happens when the air conditioning system is signaling an error code. To resolve, retrieve the exact error code from your Daikin aircon display and follow the corresponding troubleshooting that goes with that Daikin error code.
This is clearly not the case of your Daikin aircon won’t turn on. If your Daikin AC turns on and off by itself, check first whether all the indoor units in your multi-split air conditioning system are affected. The fault is in the indoor PCB, if only one indoor unit of a multi-split air conditioning system is showing a problem. But if all indoor units have a similar issue, then the defect is likely in the outdoor PCB. Still, the best course of action in this situation is to hire a service technician. Malfunctioning aircon PCBs require professional assistance.
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If your Daikin aircon won’t turn on via the remote control but has no issue when you press the Power button on the indoor unit, then the issue is clearly with the remote controller or the sensor receiver, all of which are easy and inexpensive to fix. Check the remote’s batteries, and replace them if drained. A malfunctioning Daikin remote or a defective sensor receiver can all be easily replaced, as well. You can find suitable Daikin aircon components in our Aircon Spare Parts page.
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