Display Codes & Quick Troubleshooting
If your device displays an error code or behaves abnormally, please refer to the guide below to resolve the issue quickly.
| Screen Display - SM1500-AIR | What It Means | What to Do |
|---|---|---|
 |
Connection is correct, ready to go. | Start your engine normally. |
 |
Clamps are connected backward. | Swap the red and black clamps. |
 |
Clamps are touching each other or the same metal. | Separate the clamps and reattach to the correct terminals. |
 |
Unit temperature is above 65°C/149°F. | Let it cool in a shaded spot for about 20 minutes. |
 |
Unit temperature is below -30°C/-22°F. | Bring it indoors and let it warm up. |
| Battery Low | Unit charge is below 10%. | Charge for at least 30 minutes before use. |
| No Display | Vehicle battery is below 0.5V, or unit is asleep. | Charge for 5 min and press power, or use Force Start below. |
Except for SM1500-AIR Model
If your device displays an error code or behaves abnormally, please refer to the guide below to resolve the issue quickly.
| Screen Code | What It Means | What to Do |
|---|---|---|
| Normal Voltage + 3 Beeps | Connection correct. Ready to start. | Proceed to start your engine normally. |
| E01 | Reverse Polarity: Clamps are connected backward. | Swap the red and black clamps immediately. |
| E02 | Short Circuit: Clamps are touching each other or connected to the same metal. | Separate the clamps and ensure they only touch their respective battery terminals. |
| E03 | Over-Temperature: Device is too hot (>65°C / 149°F). Will shut down in 10s. | Move the unit to a cool, shaded place and wait for 20 minutes before reusing. |
| E04 | Under-Temperature: Device is too cold (<-30°C / -22°F). Will shut down in 10s. | Bring the unit indoors or into a warm environment. Allow it to warm up before use. |
| E05 | Low Battery: Unit battery level is below 10%. | Charge the device for at least 30 minutes before attempting a jump-start. |
| No Display | 1. Vehicle battery is below 0.5V. 2. Unit has entered deep sleep mode. |
Option A: Charge the unit for 5 minutes, then short-press the power button to wake it up. Option B: Perform a Force Start (See safety instructions below). |
⚠️ IMPORTANT: How to Use Boost Start Mode
If your car battery is severely drained (below 0.5V) or the device is in deep sleep, the screen may remain blank. You can activate Boost Start Mode by following these steps:
- Connect the clamps to the car battery terminals (Double check the polarity!).
- With the jump starter turned on, press and hold the power button for more than 5 seconds.
- Release the button when the screen illuminates to show the voltage and you hear a "click" sound. You are now ready to start the engine.
❌ CRITICAL SAFETY WARNING:
Activating Boost Start Mode completely disables built-in short-circuit and reverse polarity protections. Any improper connection or operation can permanently damage the product, your vehicle, or cause a safety hazard. Make absolutely 100% sure that the RED (+) and BLACK (-) clamps are connected to the correct terminals before initiating Boost Start.
Activating Boost Start Mode completely disables built-in short-circuit and reverse polarity protections. Any improper connection or operation can permanently damage the product, your vehicle, or cause a safety hazard. Make absolutely 100% sure that the RED (+) and BLACK (-) clamps are connected to the correct terminals before initiating Boost Start.