When the Mitsubishi AC timer light (or what the Mitsubishi manual refers to as ‘operation indicator lamp’) blinks or flashes seven times, it means there is a control system issue in the outdoor PCB. But there are cases where the same error is linked to a failing indoor PCB, as well. Mitsubishi aircon PCB-related problems can result from a physical or electrical fault in the wiring, the contact points on the PCB mainboard terminal, or the PCB itself.
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Mitsubishi aircon light blinking (full guide)
Table of Contents
- Meaning of Seven Blinks or Flashes on the Mitsubishi AC Timer Light
- Understanding the Mitsubishi Indicator Lamp and Identifying the Error
- Troubleshooting the Error Code Indicated by 7 Blinks on the Mitsubishi AC Timer Light
- Estimated Cost of Repairing the Error Indicated by 7 Blinks on the Mitsubishi AC Timer Light
- Conclusion
The Mitsubishi air conditioning unit shows an error code, as well as the error’s likeliest source, through the AC timer light’s blinks or flashes. Once an error is detected in the system and its probable source identified, the Mitsubishi aircon’s indoor fan motor will instantly stop running and the upper or left operation indicator lamp will start to blink. The number of blinks corresponds to a specific error code. But do note that before you go about diagnosing and troubleshooting the issue, check first if the aircon’s horizontal vane is secure and inserted correctly. If the flaps are loose, they will also cause the indicator lamp to blink
To communicate an error code, the upper or left operation indicator lamp of the Mitsubishi AC indoor unit will start to blink. To determine the error code, count the number of blinks between the delays. The interval between the blinks is brief and runs for less than a second, while the interval between the blinking pattern is 2.5 seconds.
Troubleshooting the Mitsubishi error code of seven blinks on the AC timer light is fairly straightforward. Turn off the air conditioning unit, unplug it from the power outlet, and then check the outdoor unit–as far as you can access the internal parts–for dirt, signs of damage, and loose or severed wiring connections. The likeliest culprit is the outdoor PCB circuit board, so be sure to check that part. Don’t forget to mind the PCB in the indoor unit, too. If you are satisfied and everything seems to be in order because you’ve been doing HDB’s suggested aircon maintenance tips anyway, then connect the aircon to the power outlet, restart it, and see if the error has cleared. If the AC timer light is still showing the same seven-blink error code, then consider getting in touch with aircon service experts.
Silverback Aircon’s well-maintained collection of refurbished Mitsubishi aircon spare parts can readily replace any of your air conditioning unit’s malfunctioning PCBs–if they were ultimately found to be the cause of the error. And for damaged outdoor PCBs, Silverback Aircon has a cost-effective practice when it comes to repairing them. If one of your outdoor PCBs is defective, we will opt to go the extra mile and replace the whole circuit box containing the full set of Mitsubishi PCBs matching your condenser model. For the Mitsubishi condenser model MXY3A28VA, three types of PCBs (control board, power board, and noise filter) exist. For the Mitsubishi condenser model MSYGE10VA, only two PCBs (the control board and power board) are employed.
Here’s an itemized summary of the cost of replacing the potentially damaged PCBs involved in this particular Mitsubishi AC error code:
Solving Mitsubishi aircon PCB-related problems, like the issue indicated by seven blinks on the AC timer light, is just one of the many aircon servicing options that Silverback Aircon offers. Let us get your Mitsubishi AC back in good running condition again. Call us for a free consultation via Whatsapp.
