- GPS signal is weak or you are indoors (GPS mode blocks unlock without enough satellites).

Move to an open outdoor area and wait until the app shows “Ready to fly”. If you must fly indoors, long-press the GPS switch to enter ATTI mode. (GPS functions will be unavailable in ATTI.) :contentReference[oaicite:0]{index=0}

- Compass calibration is in progress or compass interference is detected.

Redo compass calibration in an open area away from metal structures, cars, or power lines. :contentReference[oaicite:1]{index=1}

- Battery is too low, or there are abnormalities with propellers/arms/motors/ESCs.

Charge with the original cable and check/replace propellers; inspect the airframe if a crash occurred. :contentReference[oaicite:2]{index=2}

- The gimbal cover is still on or gimbal protection is active.

Remove the gimbal cover before power-on. :contentReference[oaicite:3]{index=3}

- Aircraft not on a level surface / gyro not calibrated.

Place the drone on a flat surface, power on, let the self-check finish; if needed, calibrate the gyro. :contentReference[oaicite:4]{index=4}

- During compass calibration the gimbal does not function.

Complete calibration, then wait for the gimbal to re-center. :contentReference[oaicite:5]{index=5}

- GPS is unstable due to buildings/obstructions; or compass interference.

Fly in open areas; land and recalibrate the compass; try another location away from towers and power lines. :contentReference[oaicite:6]{index=6}

- Deformed or damaged propellers.

Replace with new propellers before flight. :contentReference[oaicite:7]{index=7}

- Signal interference from buildings, towers, or power lines; or the RC/phone are not facing the drone.

Operate in open areas and keep the transmitter/phone oriented toward the drone to improve link quality. :contentReference[oaicite:8]{index=8}

- Aggressive stick inputs or phone performance issues.

Use smooth joystick movements; close background apps on the phone. :contentReference[oaicite:9]{index=9}

- USB cable not fully seated or wrong phone prompt selection.

Reconnect firmly. On Android choose “Charge only”; on iPhone tap “Trust” when prompted. :contentReference[oaicite:10]{index=10}

- App permissions not granted.

Grant all permissions requested by HS GPS V5. :contentReference[oaicite:11]{index=11}

- RTH requires GPS mode, a recorded Home Point, and no compass interference.

Wait for strong GPS, confirm Home Point recorded (status solid green), then press the RTH button. :contentReference[oaicite:12]{index=12}

- In Low-Voltage RTH the aircraft behavior is limited.

When low-voltage RTH starts, allow auto-return or land promptly; near 2nd stage it descends directly. :contentReference[oaicite:13]{index=13}

- Performed near magnetic sources (cars, steel structures, scaffolding) or while carrying ferromagnetic items.

Move to an open area, keep phones/keys away, hold the drone about 3 ft off the ground, and rotate as instructed. :contentReference[oaicite:14]{index=14}

- Charging started right after flight or non-original cable used.

Let batteries cool to room temperature and use the original USB cable/adapter (5–12V, up to 2A; QC/PD supported). Fastest charge per battery is about 110 minutes with fast chargers. :contentReference[oaicite:15]{index=15}

- The hub charges one by one from higher to lower state of charge; QC/PD adapter not used.

Use a QC/PD USB-C adapter (5–12V, max 2A). The hub auto-switches batteries until all are full; status LED shows progress. :contentReference[oaicite:16]{index=16}

- Mode not enabled or battery SOC too low for output.

Insert a battery, power it on, connect your device to the hub’s output, then press the mode button once (LED turns blue, slow flash). Some special devices may not be supported. :contentReference[oaicite:17]{index=17}

- Accumulation requires more than one battery and a long press on the mode button.

Insert multiple batteries and power them on, then press-and-hold the mode button until the LED turns red. The hub transfers power from lower-SOC batteries to the highest-SOC one and stops when full/low; charge the depleted packs soon after. :contentReference[oaicite:18]{index=18}