Most genuine CVF-S1 units have a QR code sticker on the side. Scanning this with your smartphone usually redirects to the direct download link for that specific hardware version.
Due to the global supply chain, many CVF-S1 units are sold without physical documentation. Here is how to get the digital version: Convo Inverter Cvf-s1 Manual
Pages 78-85 detail the built-in PID controller. You can input a pressure or flow setpoint via AI2 (4-20mA) and the CVF-S1 will automatically adjust motor speed to maintain that setpoint without an external PLC. Parameters A2.00 to A2.05 govern proportional gain, integral time, and feedback scaling. Most genuine CVF-S1 units have a QR code sticker on the side
The manual provides a clear terminal diagram. Let's decode the most confusing part: the control terminals. Ambient temperature: –10°C to +40°C (derate above 40°C)
| Terminal Label | Signal Type | Purpose | | :--- | :--- | :--- | | +10V / GND | Power Supply | Provides 10V for external potentiometer (1k to 5k ohm). | | AI1 / GND | Analog Input | 0-10V input (Connect wiper of pot here for speed control). | | AI2 / GND | Analog Input | 4-20mA input (For pressure transducers or PLC). | | COM / FOR | Digital Input | FOR to COM = Run Forward. | | COM / REV | Digital Input | REV to COM = Run Reverse. | | TA / TB / TC | Relay Output | TB-TC = NC; TA-TC = NO (250VAC/3A). Use for fault alarms. |
Pro Tip from the Manual: Always use shielded twisted pair cable for analog inputs (AI1/AI2). Connect the shield only to the inverter's GND terminal to prevent electrical noise interference.
Sites like ManualsLib, AutomationDirect (if rebranded), or industrial parts distributors often archive these manuals. Warning: Ensure the file size matches (approx 5-15MB) to avoid fake driver installers.