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TheAChub
Code Text Description Cause Check Procedure 4230 High temp on Heat sink on inverter. Blockage in air passage of inverter heatsink, Inverter board failure, inverter fan failure. Check blockages in air duct failure of INV fan or failure of thermistor. Error Code 4230 Detail Code 125
1. Error code definition
Heatsink overheat protection (Detail code 125)
2. Error definition and error detection method
When the heat sink temperature (THHS) remains at or above TOH is detected.
3. Cause, check method and remedy
For inverter-related error codes, refer to the following page(s). [8-10 Troubleshooting Inverter Problems]
models TOH
INV35Y, INV36Y, INV42Y 100°C
INV37YC 94°C
Cause Check method and remedy
(1) THHS failure 1) Check for proper installation of the INV board IGBT. (Check for proper installation of the IGBT heatsink.)
2) Check the THHS sensor reading on the LED monitor.
→If an abnormal value appears, replace the INV board.
(2) Outdoor unit LEV9 malfunction
Check the operation of the unit in the Cooing or in the Heating mode.
LEV9
Refer to the following page(s). [8-8 Troubleshooting LEV Problems]
(3) Low-pressure sensor fault Refer to the following page(s).
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