If the air becomes too cold, this may cause a heating problem because your ductless mini-split may struggle to siphon heat from the air. This isn't a problem unless the temperature drops quite low, but when that does happen the ductless mini-split system struggles to provide enough heat. Related Article: Ordinary Air Conditioner Compressor How Daikin describes it: A technology that monitors your system for problem areas and makes it easier than ever to troubleshoot issues with residential air conditioning systems. What it is in plain language: CoreSense Diagnostics is a special module that's installed on many Daikin air conditioners to provide HVAC technicians with precise Guide to Fixing Problems with Your Daikin Air-Conditioner 1. Daikin AC Unit Won't Start. Typically, air conditioning systems consume a substantial amount of power to operate efficiently. Consequently, one of the most common reasons a Daikin air conditioner fails to start is due to a blown or tripped circuit breaker.To determine if this is the PCB is an abbreviation for the term 'Printed Circuit Board.'. The devices are similar to the CPU or Motherboard of a computer. It is important to realize that a Motherboard is still contained in an air conditioner. PCB is a green board that acts as the wiring for different components such as transistors, capacitors, resistors, etc. 1. Select the product group. Split/Multi-Split. Air Purifiers. Others. 2. Select a trouble. Does not cool/warm. Does not operate immediately. Operation stops. Operation does not stop. Abnormal sound during operation. Abnormal sound during filter cleaning. Abnormal sound In non-operation. Odor. Cleaning. Remote controller. Lamp indication. The most common problem every air conditioner owner face is a failed capacitor. It happens frequently and you have to spend a lot of money on repair and replacement. In this article, you will learn why the air conditioner capacitors fail, what happens when an AC capacitor fails; and what steps you can take to prevent that from happening. Here are four common causes of heating problems with a Daikin Mini Split: Low thermostat setting: Ensure that the thermostat is set to the desired temperature for heating. If it is set too low, the unit may not produce warm air. Dirty filter: A dirty air filter can restrict airflow and reduce the effectiveness of the heating function. Daikin air conditioner flashing green light usually is the sign of something stuck in the fan. After you make sure the outdoor unit is not block, try to reset the unit. We will show you how to do that now. You will see a switch isolates the town to the outdoor unit. Switch that to the off position for about 10 seconds. Residential and commercial aircons from Daikin are known to be extremely reliable and affordable. However, these aircon installations can run into a number of problems if not maintained properly. Be sure to take note of them in order for you to determine what types of aircon repairs are necessary for your unit. Otherwise, it could become permanently damaged. Low Refrigerant Levels. A blinking blue light on your Daikin AC can indicate low refrigerant levels. Refrigerant doesn't typically deplete or evaporate, so if levels are low, it usually means there's a leak in your air conditioner. A professional HVAC technician can help identify and fix the leak. rdNtH.