Hitachi, Ltd. is a Japanese multinational conglomerate that is headquartered in Tokyo, Japan. The company began to operate as part of the Nissan Group in 1951. Hitachi, Ltd. is the parent company of Hitachi Technology. Earlier in its history it was part of the Nissan zaibatsu Corporation and later of the DKB Group and Fuyo Group of companies before forming the Mizuho Financial Group.
Hitachi is a company that produces disk arrays, servers, mainframe computers and software. Hitachi offers a wide range of products that are used by many people, including air conditioners.
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On this page, you will find more information about the most common causes and most relevant solutions for the AC error '12 flashes'. Do you need help straight away? Visit our support page.
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It has never been easier to solve error "12 flashes".
View list of solutions Contact an expertError information
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Category
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Error code12 flashes
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ProductAC
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DeveloperHitachi
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First seenSeptember 8, 2021
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VerifiedYes
What causes the 12 flashes error?
The Hitachi documentation indicates that error code '12 flashes' is caused by the following problem: "Indoor/Outdoor communication error".
Do you think there is another cause for this error? Let others know in the comments.
How to solve Hitachi AC error 12 flashes
We've created a list of solutions which you can follow if you want to solve this AC problem yourself. Do you need more help? Visit our support page if you need professional support with AC right away.
Hitachi solution
Check interconnecting cable.
Do you still have problems with this error? Try one of the quick fixes below or leave a comment.
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Verified solution
There are some things that can cause problems with your Hitachi products. For example, you may see a message that reads 12 flashed while you are using your home appliances. If some components in your computer or your power supply start malfunctioning, this error can occur. Sometimes other device or server problems can cause an error similar to error 12 flashing while using your Hitachi air conditioner.
If you continue to get this error message, try a few different solutions to fix it.
If you notice that the indoor unit is flashing 12 times during operation, it may mean that the indoor unit is not communicating with the outdoor unit. Check the cables that connect the indoor unit to the outdoor unit, look for broken wires, corrosion, and loose fittings.
Reconnect any loose or damaged communication cable by following the instructions on the wiring diagram. Repair a faulty communication cable between the indoor and outdoor units. It is possible that the indoor and outdoor ACs are faulty.
Replace the faulty control board. Check if the fuse that controls the communication between the outdoor unit and the indoor unit is open and make adjustments to prevent short circuits. Provide the correct communication cable by using the instructions that are provided in your User Manual.
When your Hitachi air conditioner is blinking a timer, it may indicate that the AC power supply is not working properly.
Check the electrical wiring in the outdoor unit and correct any problems that may occur, using the instructions in the User Manual. Check for and replace a faulty unit in the outdoor unit.
If you are not getting cooling or cold air, it could be that your air filter or outdoor unit is dirty, or it could be that the thermostat is not controlling the temperature properly. If you have dirty filters that cause your air conditioner to not be able to cool properly, you are probably experiencing a problem with your cooling system.
Hitachi air conditioners have various modes that go from AUTO to HEAT to DEHUMIDIFY to COOL and FAN to OFF and ON every time that you press the mode button on the remote control. If it is cool, you can work in the COOL or AUTO modes.
You can also try contacting the company to get an error code fixed. You can try calling the customer support number or visiting their website. You will need to send a message to the customer service department. They will help you figure out what you should do to fix the error, and maybe they can even give you a new solution.
Have you found a solution yourself, but it is not in the list? Share your solution in the comments below.
