Blue Star Inverter AC Error Codes List 2025 - Summary
Blue Star is a well-known name in the home appliance industry across India for its quality air conditioning solutions and great after-sales service. The company is based in Mumbai and is a leading name in air conditioning, commercial refrigeration, and MEP services. Founded in 1943, Blue Star Limited has grown to be the second-largest homegrown brand in India’s air conditioning market, with revenue exceeding 5,404 crore INR (around 680 million USD) in recent years.
Complete Guide to Blue Star Inverter AC Error Codes PDF Download
If you’re looking for the Blue Star Inverter AC Error Codes PDF, this article gives you a full list of common error codes, their meanings, and how to reset them. This useful guide helps both users and technicians fix problems quickly. You can download the full Blue Star Inverter AC Error Codes PDF to keep this helpful info handy.
Blue Star AC Error Code List and How to Reset
The table below shows different error codes that appear on Blue Star Inverter ACs, what they mean, and how to reset them (either automatically or manually). Knowing these codes saves you time and keeps your AC working well.
| Error Code | Error Description | Reset |
|---|---|---|
| A0 | AC Over Voltage Error | Auto |
| A1 | AC Under-Voltage Error | Auto |
| A2 | Single Phasing Error | Auto |
| A7 | Phase Imbalance Error | Auto |
| b0 | Inv Compressor 1 Over Load Error | Auto |
| b1 | Inv Compressor 2 Over Load Error | Auto |
| b6 | Inv Compressor 1 Over Current Error | Auto |
| b7 | Inv Compressor 2 Over Current Error | Auto |
| b8 | Inverter Drive 1 Over Heat Error | Auto |
| b9 | Inverter Drive 1 Over Heat Error | Auto |
| bA | Inverter Drive 1 Start Error | Auto |
| bb | Inverter Drive 2 Start Error | Auto |
| bC | ODU Fan Motor 1 Feedback Error | Auto |
| bd | ODU Fan Motor 1 Feedback Error | Auto |
| C1 | Communication Error (Between ODU Control Board & ODU Power Board) | Manual Check |
| C2 | Communication Error (Between ODU Control Board & ODU Fan Board) | Manual Check |
| C3 | Communication Error (Between Master and slave ODUs) | Manual Check |
| C4 | Communication Error (Between Master and slave IDUs) | On IDUs supply & Manual Check |
| C5 | Communication Error (Between IDUs & Wired Handset Remote) | Manual Check |
| C6 | Auto-Addressing Error | Manual Check |
| C7 | Communication Error (Inverter Drive 1) | Manual Check |
| C8 | Communication Error (Inverter Drive 2) | Manual Check |
| C9 | Communication Error on some other IDU (Displayed on IDUs without communication error) | Manual Check |
| d0 | Inverter Drive 1 DC Over Voltage error | Auto |
| d1 | Inverter Drive 2 DC Over Voltage error | Auto |
| d2 | Inverter Drive 1 DC Under Voltage error | Auto |
| d3 | Inverter Drive 2 DC Under Voltage error | Auto |
| d8 | Inverter Drive 1 Over Heat Error | Manual |
| d9 | Inverter Drive 2 Over Heat Error | Manual |
| dA | Inverter Drive 1 Start error | Manual |
| db | Inverter Drive 2 Start error | Manual |
| dC | Inv Compressor 1 Over Current Error | Manual |
| dd | Inv Compressor 2 Over Current Error | Manual |
| dE | Inverter Drive Mismatch Error | Manual |
| E1 | HP Switch Trip error | Auto |
| E2 | HP Switch Trip for 3rd time in One Hour | Manual |
| E3 | LP Error | Auto |
| E4 | LP Error for 3rd time | Manual |
| E5 | Inv Compressor 1 High DLT (Discharge Line Temperature) | Auto |
| E6 | Inv Compressor 2 High DLT (Discharge Line Temperature) | Auto |
| E8 | Inv Compressor 1 High DLT for 4th time | Manual |
| E9 | Inv Compressor 2 High DLT for 4th time | Manual |
| Eb | ODU Fan Motor 1 feedback Error | Manual |
| EE | ODU Fan Motor 2 feedback Error | Manual |
| EC | Inv Compressor 1 Over Load Error | Manual |
| Ed | Inv Compressor 2 Over Load Error | Manual |
| F1 | Ambient Temp. Sensor Failure | Manual Check |
| F2 | DLT Inv. Compressor 1 Sensor Failure | Manual Check |
| F3 | DLT Inv. Compressor 2 Sensor Failure | Manual Check |
| F5 | ODU Liquid Temp. Sensor Failure | Manual Check |
| F6 | ODU Gas Temp. Sensor Failure | Manual Check |
| F7 | ODU Liquid Temp. Sensor Failure | Manual Check |
| F8 | ODU Gas Temp. Sensor Failure | Manual Check |
| F9 | HP Sensor Failure | Manual Check |
| FA | LP Sensor Failure | Manual Check |
| Fb | Fire Alarm from ODU | Manual Check |
| Fc | Fire Alarm from IDU | Manual Check |
| U3 | IDU Room Temp Sensor Failure (Displayed on IDU) | Manual Check |
| U4 | IDU Liquid Temp Sensor Failure (Displayed on IDU) | Manual Check |
| U5 | IDU Gas Temp Sensor Failure (Displayed on IDU) | Manual Check |
| U6 | IDU Supply Temp Sensor Failure (Displayed on IDU) | Manual Check |
| U7 | IDU Float Switch Error (Displayed on IDU) | Manual Check |
| U8 | IDU Fan Motor Error (Displayed on IDU) | Manual Check |
| U9 | Mode Conflict Error (Displayed on IDU) | Manual Check |
Detailed Blue Star Inverter AC Error Codes List
| Sr.No. | AC Error Code | Code Description |
|---|---|---|
| 1 | E1 | High-Pressure Protection of System |
| 2 | E2 | Antifreezing Protection |
| 3 | E3 | Low-Pressure Protection of System |
| 4 | E4 | High Discharge Temperature Protection of Compressor |
| 5 | E5 | Overcurrent Protection |
| 6 | E6 | Communication Malfunction |
| 7 | E8 | High-Temperature Resistant Protection |
| 8 | EE | EEPROM Malfunction |
| 9 | EU | Limit Frequency due to High Temperature of Module |
| 10 | C5 | Malfunction Protection of Jumper Cap |
| 11 | F0 | Gathering Refrigerant |
| 12 | F1 | Indoor Temperature Sensor Short Circuit |
| 13 | F2 | Indoor Evaporator Temperature Sensor Short Circuit |
| 14 | F3 | Outdoor Ambient Temperature Sensor Short Circuit |
| 15 | F4 | Outdoor Condenser Temperature Short Circuit |
| 16 | F5 | Outdoor Discharge Temperature Sensor Short Circuit |
| 17 | F6 | Limit Frequency due to Over Load |
| 18 | F8 | Limit Frequency due to Overcurrent |
| 19 | F9 | Limit / Decrease Frequency due to High Air Discharge |
| 20 | FH | Limit Frequency due to Antifreezing |
| 21 | PH | DC Bus Bar Voltage is High |
| 22 | PL | DC Bus Bar Voltage is Low |
| 23 | P5 | Overcurrent Protection of Phase Current for Compressor |
| 24 | PU | Capacitor Charging Malfunction |
| 25 | P7 | Module Temperature Sensor Circuit Malfunction |
| 26 | H3 | Overload Protection for Compressor |
| 27 | H5 | IPM Protection |
| 28 | P8 | Module Temperature is Too High |
| 29 | H6 | Fan Motor Not Operating |
| 30 | H7 | Compressor Desynchronising |
| 31 | HC | PFC Protection |
| 32 | L3 | Outdoor DC Fan Motor Not Working |
| 33 | L9 | Power Protection |
| 34 | LP | Indoor and Outdoor Unit Mismatch |
| 35 | LC | Startup Failure |
| 36 | U1 | Malfunction of Phase Current Detection for Compressor |
| 37 | U3 | Malfunction of Voltage Dropping for DC Bus Bar |
| 38 | U5 | Gas Leakage Detected |
| 39 | U7 | Four-way Valve Not Functioning Normally |
| 40 | U8 | Zero Cross Detection Circuit Malfunction |
Downloading the Blue Star Inverter AC Error Codes PDF will give you simple access to this full list when you need it. These error codes help you spot problems early and take the right steps, like checking things manually or waiting for automatic resets. Keep your Blue Star inverter AC working well by using this updated 2025 guide for all error codes.
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