A Mitsubishi aircon timer light (or what the official Mitsubishi manual refers to as the ‘operation indicator lamp’), rapidly blinking or flashing five times before turning off for 2.5-seconds and then going through the same blinking pattern again, is pointing to an abnormality in the power system of the outdoor AC unit–which houses critically important parts such as the condenser, compressor, and outdoor fan motor. The suggested course of action to address the error is to check the compressor wiring system, the inverter’s output voltage, and the compressor’s winding resistance.
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Mitsubishi aircon light blinking (full guide)
Table of Contents
- Meaning of Five Blinks or Flashes on the Mitsubishi AC Timer Light
- Understanding the Mitsubishi Indicator Lamp and Identifying the Error
- Troubleshooting the Error Code Indicated by 5 Blinks on the Mitsubishi AC Timer Light
- Estimated Cost of Repairing the Error Indicated by 5 Blinks on the Mitsubishi AC Timer Light
- Conclusion
The Mitsubishi air conditioning unit communicates an error, as well as the error’s most probable source, through blinks or flashes on the AC timer light. If an error is detected and its likeliest source identified, the indoor AC fan motor will automatically cease running and the upper or left operation indicator lamp will start to blink. The number of blinks corresponds to a particular error code. But before you engage in error diagnosis and troubleshooting, check first whether or not the aircon’s horizontal vane is in place. Because if it is loose and not inserted properly, it will also cause the indicator lamp to flash.
To indicate an error, the upper or left operation indicator lamp of the Mitsubishi indoor air conditioning unit will begin to blink. To get the corresponding error code, count the number of blinks between the delays. The interval between the blinks is a quick 0.5-second stop, while the interval between each blinking pattern is 2.5 seconds.
A generalized power system fault in the outdoor unit, indicated by five blinks or flashes of light on the Mitsubishi AC operation indicator lamp, calls for a check on the outdoor AC component, particularly the compressor wiring and power source inverter. If the error code appears right after a massive power surge, then that further narrows down the cause and which part(s) may have been damaged. Energy-efficient cooling is a hugely important matter, a fact that the NEA keeps emphasizing. So ensure there’s no obstruction, dirt, or loosened parts on and around the compressor of the outdoor air conditioning unit. Take a look at the wiring’s contact points to the PCB mainboard terminal. If you have a way to access these internal parts. Once everything seems to be in order. Plug the aircon back in and restart it. See if the error has been cleared from the system. If the aircon timer light is still blinking the same error, then perhaps it’s time to seek professional help.
Silverback Aircon has an expertly maintained collection of refurbished Mitsubishi aircon parts, in case the power system fault is caused by or has led to defects in the compressor or the associated wiring system in the outdoor unit.
Do note that if your compressor unit is found to be the cause of the error, Silverback Aircon will not repair the compressor. We will go the extra mile to replace the Mitsubishi condenser unit (which contains the compressor as well as the associated wiring and other parts). We also have a similar practice in place when it comes to damaged outdoor PCBs. For the Mitsubishi condenser model MXY3A28VA, three types of PCBs–control board, power board, and noise filter–exist. For the Mitsubishi condenser model MSYGE10VA, on the other hand, only two PCBs–the control board and power board–are used. If one of your outdoor PCBs is malfunctioning, we will replace and put in the entire circuit box containing the full set of Mitsubishi PCBs, all of which have their own aircon capacitors. The tabulated summary below shows the cost of replacing the potentially damaged parts involved in this Mitsubishi AC error code:
