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| Error Code | Fault Meaning & Symptoms | Suspected PCB Component | Diagnostic Action | Lab Repair |
|---|---|---|---|---|
| E1 | Carrier Inverter AC E1 Error Code Indoor Room Sensor AC shuts off immediately after powering on, displaying E1. | Indoor Display & Main PCB Sensor Circuit | Measure sensor resistance (nominal 10k or 15k ohm at 25°C). Replace faulty NTC sensor or replace sensor pull-up SMD resistor on indoor PCB. | WhatsApp Repair Board |
| E1 | Carrier Inverter AC E1 Error Code Indoor Room Sensor AC shuts off immediately after powering on, displaying E1. | Indoor Display & Main PCB Sensor Circuit | Measure sensor resistance (nominal 10k or 15k ohm at 25°C). Replace faulty NTC sensor or replace sensor pull-up SMD resistor on indoor PCB. | WhatsApp Repair Board |
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