Professional HVAC Motor Tester for Quick Fault DiagnosisThis universal D.C fan motor tester simplifies troubleshooting for HVAC technicians and DIY enthusiasts. Designed for 3-wire and 5-wire D.C motors, it detects issues like motor failure, speed inconsistency, or abnormal feed back signals. The digital display instantly reveals RPM frequency, while the 310V short-circuit protection safeguards both the tester and motor during testing.Hassle-Free Testing with Intuitive DesignColor-Coded Ports: Match wires effortlessly:Red 310V | Black GND | Yellow VSP (speed control)Blue FG (speed feed back) | White 15V (VCC)3-Wire/5-Wire Switch: Toggle modes for compatibility with all standard D.C motors.Adjustable Speed Knob: Simulate real-world operating conditions by gradually increasing motor speed.Built to ProtectSturdy Housing:Good casing resists accidental drops or impacts.Short-Circuit Protection: Automatically cuts off power if 310V overload is detected.How to Use:Connect Wires: Match motor wires to the testers labeled ports (check motor nameplate for correct functions).Select Mode: Press/pull the 3-wire/5-wire switch based on your motor type.Test & Diagnose: Slowly turn the speed knob. If the motor accelerates smoothly and the screen displays rising RPM frequency motor is healthy. If no rotation, unstable speed, or abnormal frequency motor fault detected.WARNING:Always double-check wire functions before connecting to avoid burnout.Do not connect NC (empty) ports.