Checking code 1112: Liquid level detecting temperature sensor abnormality (TH4) Meaning, detecting method When saturation temperature sensor (TH2) or liquid level detecting temperature sensors (TH3, TH4) detects -40˚C or less (the first time) during operations, outdoor unit stops once, mode is changed to restart mode after 3 minutes, then the outdoor unit restarts. When -40˚C … Read more
Checking code 1111: Low pressure saturation temperature sensor abnormality (TH2) Meaning, detecting method When saturation temperature sensor (TH2) or liquid level detecting temperature sensors (TH3, TH4) detects -40˚C or less (the first time) during operations, outdoor unit stops once, mode is changed to restart mode after 3 minutes, then the outdoor unit restarts. When -40˚C … Read more
Checking code 1102: Serial transmission abnormality. Discharge temperature abnormality (Outdoor unit). Meaning, detecting method When 140˚C or more discharge temperature is detected during operations (the first time), outdoor unit stops once, mode is changed to restart mode after 3 minutes, then the outdoor unit restarts. When 140˚C or more temp. is detected again (the second … Read more
Checking code 0403: Serial transmission abnormality. Meaning, detecting method If serial transmission cannot be established between the MAIN and INV boards. Cause Wiring is defective. Switches are set wrong on the INV board. A fuse (F01) on the INV board is defective. The circuit board is defective.
Description: DC_link voltage sensor error. Checklist: Is the input voltage of outdoor terminal block is normal? Is the reactor wire connected? Is the PFC resistor(“A”) value is normal? (Outdoor PBA) Troubleshooting Procedure