a) LED Indicators

• Voltage Indicator (V): On in voltage display mode; off otherwise.
• Speed Indicator (RPM): On in speed display mode; off otherwise.
• Current Indicator (A): On in current display mode; off otherwise.
• Power Indicator (W): On in power display mode; off otherwise.
• Tank Full Indicator (Tank): On when the tank is full; off otherwise.
• Well Dry Indicator (Well): On when the well is out of water; off otherwise.
• Solar Mode Indicator (MPPT): The closer it is to the maximum power point, the faster the MPPT light flashes; off when stopped.
• Power & Run Indicator (Power): Flashes when the pump is stopped; stays on when running.

b) Buttons

• Switch: Short press to cycle through speed, current, voltage, and power parameters.
• Enter: Select/confirm in the settings interface.
• Up: Increase level.
• Down: Decrease level.
• ON/OFF: Motor run switch. When turned off, the display shows “OFF” and other buttons are inactive. When a fault code is displayed, short press to quickly clear the fault.

c) Settings
The settings use a two-level menu:

• Long press the settings button to enter the settings list.
• Short press Enter to enter detailed settings.
• Short press again to exit detailed settings.
• Long press again to exit the settings list.
• The system will also exit automatically after a period of inactivity.
• The motor will stop when entering settings.

When P0.0 ≠ 12, other settings cannot be modified.
The default value of P0.0 is 0.
To modify settings, first set P0.0 to 12.
When P0.0 is set to 21, the system will restore factory settings.

The following is the detailed settings list:

Function Code	Name	Default Value	Description
P0.0	User Access Permission	0~21	12: Enable modification access 21: Restore factory settings
P0.1	Dry-run Protection Enable	1	0: Disabled    1: Enabled
P0.2	Power Supply Mode	0	0: Auto detection 1: Battery 2: Solar power
P0.3	Voltage Protection Hysteresis	15	Range: 2~40
P0.4	DC Undervoltage Protection Value	Model dependent	Alarm will trigger when voltage is below this value
P0.5	Dry-run Power Point 1	Model dependent	No-load power at 2000 RPM
P0.6	Dry-run Power Point 2	Model dependent	No-load power at 3000 RPM
P0.7	Dry-run Power Point 3	Model dependent	No-load power at 4000 RPM
P0.8	Dry-run Power Point 4	Model dependent	No-load power at 5000 RPM
P0.9	Maximum Speed Setting	4000	Range: 1000~4000
P9.8	Pump Model	Model dependent	—
P9.9	Program Version + Manufacturer Code	Model dependent	—