1. Belt deviation: Increase the coal quantity of a normal coal feeder, close the feed gate of the deviation coal feeder, start the coal feeder, adjust the tension screw at the tail of the coal feeder, and forcibly close the discharge gate after all the remaining materials are fed. Run the coal feeder until there is no deviation. Open the sealing air and open the inlet and outlet doors to evenly load the material
 

2. Measurement failure: Transfer the equipment from remote control to local control, set a frequency of 50HZ on the frequency converter, and operate the coal feeder. If the instrument fails, the instrument spare parts can be replaced. If the weighing sensor or speed sensor fails, they need to be replaced when the furnace is stopped for maintenance
 

3. Coal feeder blockage fault: The coal feeder stops, the boiler load decreases, the sealing air is turned off, and the manhole is opened to clean up the accumulated coal
 

4. Coal feeder overtemperature alarm: Adjust the boiler air volume to reduce the temperature in front of the furnace
 

5. Chain breakage alarm: Check the cause of the chain breakage alarm (1) If there is too much coal accumulation, stop the coal feeder, reduce the boiler load, close the discharge gate, open the maintenance door of the coal feeder to clean the accumulated coal, and then run the coal feeder; (2) If the proximity switch malfunctions, stop the coal feeder, close the gate door, open the inspection hole at the driven shaft of the cleaning chain, and determine whether the proximity switch is damaged or the proximity switch cannot sense the target disk. If damaged, replace the proximity switch. If the target disk cannot be detected, adjust the sensing distance. (3) If the cleaning chain is indeed disconnected, stop the coal feeder, reduce the boiler load, close the discharge gate, adjust the tension screw to keep the distance between the driven shaft and the driving shaft small. Use the guide chain to pull the cleaning chain together and connect it with a pin shaft.
 

6. Instrument and frequency converter malfunctions.

The instrument fault is mainly the current board problem, which is manifested in that the remote setting cannot be made, there is no feedback flow or the converter cannot be controlled. If the remote setting cannot be made, first measure whether the remote setting current is sent to the instrument. If the setting current has been sent to the instrument, check whether the current board jumper is normal, and whether the input regulating Potentiometer is available. If there is no feedback flow, first check the current board for obvious signs of burning, and if there are any burnt components, replace them. If the inverter cannot be controlled, first check the control current output value of the current board. If the output is normal, check the inverter parameters. If the output is abnormal, check the control output adjustment Potentiometer. If it is damaged, replace it. If the Potentiometer is normal, return it for maintenance.
 

Instrument malfunction occurs when the display screen and indicator lights of the instrument are positioned in a certain state and cannot be changed. Instrument malfunction is mainly caused by external interference. Generally, the instrument can be powered off and then powered on or cold started to troubleshoot.
 

Instrument black screen refers to a state where the instrument display screen cannot be displayed or the keyboard cannot be operated. When the instrument is powered off and later on, it can be displayed normally, usually due to a malfunction in the display board.
 

The instrument is unresponsive, there is no response after the instrument is powered on, the display screen does not work, and the indicator light does not light up. Check the instrument fuse, transformer and Varistor, usually the transformer or Varistor is damaged.