... switch, when it light effective.3. Limp home Fixed speed switch, while the lamp light, PWM value is ... 95%4. Pull Down switch, When the lamp light, PWM value ... then open RED4 Power, the corresponding indicator lamp will be light, display will show 00.00, it ... , oil pump power off. Press Select button, indicator lamp light, and press arrow ↑ ↓ to choose pre-set ...