Hitachi AC Error Code
Hitachi AC Error Codes – Causes and Solutions (Get Full List)
Hitachi, Ltd. is a Japanese multinational corporation – that is the parent company of Hitachi Group. With headquarters in Chiyoda, Tokyo the company has found itself in the middle of a technology hub. With a stake in IT and AI workings, the company is all set to change the infrastructure of the world.
Founded in 1919, by Namihei Odaira the company then produced induction motors used in copper mining. Since then the company has come a long way and now offers a wide range of commercial and residential appliances that are used all over the world. With their air conditioners taking the lead, back in the day as window air conditions, and now as sleek and simple ACs. While being at top of their game, it is no secret that some users are facing ac error codes that are unable to handle.
While there are times when a simple issue might seem like a great deal, one of these is an ac error code, especially during the summer season. The best way to deal with the situation is to note down the error code and match it using the list below. Once you have the error code you can easily work your way to the fix. To help you out we have listed down some of the most common error codes for Hitachi ACs.
Codes List
Multi-split System, Heat Pump AC
Self-Diagnostic Malfunction Codes
If the unit malfunctions then an error code will display on the controller as below. Error codes and Drive Error Codes can also be interrogated using the Running Parameter function on the controller. They are also displayed on the outdoor PCB.
Remote Controller Alarm Codes
Regarding the retry control, the lastest retry code will be indicated unless the protection control related with the frequency control is indicated.
Inverter AC Codes List
RAC Fault Codes – (Indoor Units Flashing)
Troubleshooting
| Trouble | Cause |
|---|---|
| Hissing or fizzy sounds | Refrigerant flow noise in the pipe or valve sound generated when flow rate is adjusted. |
| Squeaking noise | Noise generated when the unit expands or contracts due to temperature changes. |
| Rustling noise | Noise generated with the indoor unit fan’s rpm changing such as operation start times. |
| Clicking noise | Noise of the motorized valve when the unit is switched on. |
| Perking noise | Noise of the ventilation fan sucking in air present in the drain hose and blowing out dehumidifying water that had accumulated in the condensed water collector. For details, consult your sales agent. |
| Changing operation noise | Operation noise changes due to power variations according to room temperature changes. |
| Mist emission | Mist is generated as the air within the room is suddenly cooled by conditioned air. |
| Steam emitted from the outdoor unit | Water generated during defrosting operation evaporates and steam is emitted. |
| Odors | Caused as the smells and particles of smoke, food, cosmetics, etc. present in room air become attached the unit and blown off into the room again. |
| The outdoor unit continues to operate even if operation is stopped. | Defrosting is underway (as the heating operation is stopped, the microcomputer checks frost accumulated in the indoor unit and instructs the unit to perform automatic defrosting if necessary). |
| The OPERATION lamp is blinking. | Shows preheating or defrosting operation is underway. As the protective circuit or preheat sensor operates when unit operation is stopped during preheating and then restarted, or when operation mode is switched from cooling to heating, the lamp continues to blink. |
| Does not reach the temperature setting. | Actual room temperature may deviate slightly from the remote controller’s temperature setting depending on the number of people in the room, indoor or outdoor conditions. |
Wiring Diagrams
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