1. No response after booting
a. No power input. Measure whether the heater power supply is normal according to the circuit diagram, and check the vehicle insurance and line power supply. Check the power supply, check the power-on signal wire, and check the ground wire.
b. Thermocouple problem: Phenomenon: Measure both ends of the thermocouple, and the resistance value is 0 ohms. Reason: The two outgoing wires of the thermocouple were connected to the shell, causing the ignition sensor to be grounded.
2. Indicator problem
a. The indicator light is always on. Maybe the control circuit is broken, or the ground wire is not connected.
b. The power-on indicator flashes
The fault location can be judged according to the flashing frequency of the heater indicator light against the fault flash code table, and the corresponding parts can be repaired or replaced.
3. The heater emits black smoke
a. Heater carbon deposits, clean carbon deposits.
b. The fuel injector or filter or the fuel pipe is blocked, clean or replace the corresponding parts.
c. The pressure of the oil pump decreases and the oil pump is changed.
4. The heater works normally, but fires repeatedly. Reason: When the hot spot couple is heated, the inner furnace wire will be connected to the shell, causing a short circuit of the ignition sensor. The controller considers that it is extinguishing the fire, and the ignition sensor needs to be replaced.
5. Heating
It shows that the heater is overheated, and the radiator and defroster are not hot. Reasons: The water return port is too thin; there is gas in the waterway; the hose is bent; there is a foreign object in the pipeline; the water pump is faulty; the inlet and return valve is not opened, the engine thermostat is opened too early, etc., and the cause is determined. Corresponding maintenance.
