The content of the article:
When the TIMER indicator blinks, wait a while. Perhaps the equipment is warming up before starting.
If the TIMER indicator is on without blinking, look for a Hitachi air conditioner error in the table:
| Indicator 301 | Deciphering error codes for Hitachi air conditioners |
| 01 | The reversing valve does not work. Media temperature is abnormal |
| 02 | Forced start mode of the external module |
| 03 | No communication between internal and external modules |
| 04 | Equipment failure, pay attention to other indicators |
| 06 | Condensate pump disrupted |
| 07 | You must manually start the pump |
| 08 | Engine function impaired |
| 09 | No connection with PCB thermistor |
| 10 | The fan does not work correctly |
| 13 | RSV does not work |
Error codes of air conditioners Hitachi outdoor unit
| 301 indicator flashes | Decoding error conditioner Hitachi |
| 1 | Normal mode |
| 2 | Compressor stopped, PCB error |
| 2 and diode 302 | PCB failure, current supply to the module is interrupted |
| 3 | The engine rotates at low speeds |
| 4 | Compressor stopped |
| 5 | Mains voltage too low |
| 6 | Thermistor Overheat |
| 7 | Thermistor malfunctioning |
| 8 | The compressor engine speed does not increase |
| 9 | No communication between indoor and outdoor units |
| 10 | Power outages |
| 12 | Fan failure |
| 13 | Central board failure |
| 14 | Power Module Failure |
The RUN indication for some time indicates a lack of communication between the controller and the control board of the indoor unit. Possible causes - violation of the integrity of the wiring, short circuit, breakdown of the controller.
Blinking 302 diodes
RUN indication at the same time as displaying the error code of Hitachi air conditioners means that you need to find the problem in the table:
| Blinking diode 302 | Problem |
| 1 | Compressor overheating |
| 2 | Thermistor icing |
| 3 | Thermistor is not responding |
| 4 | Wrong pipe selection for circuit thermistor No. 1 |
| 5 | Wrong suction pipe selection for loop thermistor # 1 |
| 6 | Wrong choice of pipe circuit number 2 |
| 7 | Wrong pipe selection for expansion of circuit No. 2 |
| 8 | Wrong choice of pipe circuit number 3 |
| 9 | Wrong pipe selection for suction circuit number 3 |
