RIDSTAR Q20 Pro Display Settings Guide - Complete Setup & Troubleshooting

1. Getting Started: Accessing the Display Interface

Powering On

Press and hold the Power Button until the screen illuminates. The display will show default metrics like speed, battery level, and odometer.

Entering Settings Mode

To access the settings menu, press and hold the + and – buttons simultaneously for 2 seconds. You’ll see the parameter interface (e.g., P1, P2, etc.).

Use +/- to navigate between settings, and press the i button to select or modify a parameter.

Saving Changes:

• Press i briefly to save and return to the settings menu.
• Press and hold i to save and exit entirely.

2. Key Personalized Parameters Explained

Here’s a breakdown of the most useful settings for U.S. riders:

P1: Unit System

• 00: Metric (km/h)
• 01: Imperial (mph)

Recommendation: Set to 01 for compatibility with U.S. road signs and speed limits.

P2: Rated Voltage

• Options: 24V, 36V, 48V, 52V

Note: The Q20 Pro defaults to 52V (dual-battery system). Verify this setting to avoid controller issues.

P3: Pedal Assist (PAS) Levels

• Choose from ranges like 0–5, 1–7, or 1–9.

Tip: Higher ranges (e.g., 1–9) offer finer control over motor assistance, ideal for hilly terrain.

P6: Speed Limit

• Adjustable from 1–100 km/h (≈0–62 mph).

U.S. Compliance: Many states cap e-bike speeds at 20–28 mph. Set this to 28 mph (45 km/h) for legal riding.

P8: Drive Mode

• 00: Pedal assist only
• 01: Throttle-only (electric)
• 02: Both modes active

Recommendation: 02 maximizes flexibility for commuting and recreation.

P9: PAS Sensitivity

• Range: 1–24 (higher = more pedal rotations needed to engage motor).

Use Case: Lower values (e.g., 5–8) provide quicker acceleration, while higher values conserve battery.

PF: Auto Sleep Timer

• Set inactivity shutdown from 1–60 minutes (00 = disabled).

Tip: Default 10 minutes balances battery savings and convenience.

3. Shortcut Operations

Factory Reset

With speed at 0, hold the Light and + buttons for 2 seconds. Select dEF-Y and press i to confirm. The display will reboot with default settings.

Reset Trip Odometer

Hold i and – for 2 seconds while stationary. The screen will flash to confirm reset.

4. Error Codes and Troubleshooting

If the display shows an error code, here’s what it means:

Pro Tip: Always power off the bike before inspecting components to prevent short circuits.

5. Why These Settings Matter: Performance and Safety

Customizing your display isn’t just about preference—it’s about optimizing performance and adhering to local regulations. For example:

• Speed Limit (P6): Staying within 20–28 mph keeps you compliant with state e-bike laws.
• PAS Strength (PA): Adjusting this (0–5) prevents sudden jerks when starting on steep inclines.
• Battery Undervoltage (Pd): Proper voltage settings protect battery health and extend lifespan.

6. Final Tips for U.S. Riders

• Legal Compliance: Confirm your state’s e-bike classifications (Class 1–3) to adjust speed and PAS settings accordingly.
• Safety First: Enable the non-zero start (P7=01) to prevent accidental acceleration.
• Battery Care: Use the factory password 1212 (PE) to enable security features without locking yourself out.

Go To User Manual: RIDSTAR Q20PRO Display Settings

Go to YouTube: Ridstar Q20 Pro Installation Video

View Product: Ridstar Q20 PRO Retro Electric Bike (YVY C20 MAX)