PH120 fire detector
The PH-120 fire detector is designed to trigger an alarm when the ambient temperature of the sensor is above 120 ° C. The control electronics in the car are evaluated by two PH-120C temperature sensors located in the engine section of the vehicle. The electronics signal the temperature increase in the engine compartment by intermittently switching the external piezo siren and the driver's dashboard. The fire detector will no longer signal an increase in temperature until the temperature drops below 115 ° C and disconnects and connects the power supply (s).
If the car is not wired, the electronics do not detect the temperature overrun (the lamp is off).
Electronics testing: short the wires from the temperature sensor (blue, green/yellow). The unit will start to signal temperature overheat. Do not short-circuit the conductor brown and (blue, green/yellow) !!!