1. Flame Failure Alarm
One of the first things that need to be done when receiving a flame failure alarm is to check the flame sensor. More than often flame sensors get dirty resulting in a flame failure alarm. In such cases take out and clean the sensor before fitting it back.
That would solve the problem (If the sensor is defective, put a new one). Some other reasons for flame failure alarm are:
In case of a dirty burner, engineers will have to clean the burner’s flame scrod and blast tube. If that doesn’t solve the issue, check the spark electrodes, which can be the reason for ignition failure. The problem of ignition failure related to spark electrodes can be solved by cleaning and adjusting them.
In case of blocked diesel oil nozzles, replace them with clean ones. A defective solenoid valve can also lead to a flame failure alarm. If the same is found, replace the solenoid valve/coil.
Lastly, the incorrect opening of the air damper might be preventing the right amount of air from reaching the combustion chamber, resulting in ignition failure. Check the opening and closing of the air damper to solve the issue.
2. High Flue Gas Temperature Alarm
There can be several reasons for high flue gas temperature alarms and the most common one is a faulty temperature sensor. Some of the other reasons for this alarm are:
Faulty inverter and transmitter circuits and input should always be checked and inputs adjusted as required. Pressure control and solenoid valves should be checked at regular intervals of time.
3. High Combustion Chamber Temperature Alarm
The main reasons for high combustion chamber temperature alarm are:
A high combustion chamber temperature alarm can also occur if the outlet is blocked with slag or the slot at the combustion chamber floor level is blocked.
4. Sludge Oil Leaking:
Sludge oil leaking mainly takes place from the base plate corners of the combustion chamber. Some of the main reasons for sludge oil leaking are:
Make sure the atomizing slot is open 3/4th to 1 full turn and the valves in the PLC are set as per those mentioned in the manual. Check the under-pressure control function in case the under-pressure is too low. If the air damper is not working properly, check its opening and closing functions. Also, make sure to open and clean the sludge nozzle atomizing slot if it’s blocked.
5. Cracks in Refractory of Combustion Chamber: