When the fault indicator on the electric control cabinet is on, before preparing for consultation or requesting a repair, please confirm the following items again.
| •When removing the overload relay, please first turn the operation mode switch on the electric control cabinet to “Stop”. To prevent the overload relay from being lifted, personnel may be caught in the machine during operation and cause injury. |
| •When the machine breaks down, stop the machine and contact our company or agency. Continuing to talk to the machine in the event of a malfunction may cause greater damage. |
♦The thermal overload relay is disconnected
When the motor or pump is overloaded, the thermal overload relay in the electrical control cabinet of the machine will be disconnected, and the protection function will be started automatically. When the relay is disconnected, the machine will stop. The warning light and the thermal overload relay of the corresponding part The fault light of the electric control cabinet will light up. In this case, eliminate the cause of the machine overload. Release the disconnected state.
If the thermal overload relay disconnects frequently, please stop the machine and contact our company or agent. If you continue to force the machine, it may cause major damage.
♦Inverter shows error signal
When the inverter detects an abnormal situation, the LCD of the inverter will display an error signal. The machine will automatically stop running.
When the content displayed on the display is inconsistent with usual. Please refer to the instruction manual of the inverter or consult our company or agency.
Recovery method after error signal
- Adjust the operation mode switch on the electric control cabinet to “Stop”.
- Eliminate the cause of the false signal.
- Press the program key/reset key of the inverter.
- Adjust the operation mode switch to “operation” and restart the machine.
♦Confirmation before consultation
Before consulting or requesting repairs, please re-confirm the following frequently occurring problems. After confirmation, if the machine does not operate normally, please consult our company or an agency.
♦Frequent problems
•Cannot run automatically
When automatic operation is set and the operation mode is switched to automatic. If automatic operation is still not possible, please confirm the following:
- Is the emergency stop button pressed?
- Are there any abnormalities in the dosing device and sludge storage tank?
- Is the thermal overload disconnected?
- Is the emergency stop button pressed?
※In the case of non-standard production, it may not be possible to completely follow the above steps.
After the above method is implemented, if it still cannot be solved, please confirm in more detail.
①Before checking, be sure to adjust the operation mode switch to “stop”, and also check whether the valve status is normal.
②When the total power of the machine is turned on, the power indicator will light up. The LED screen of the inverter will also light up. When the indicator light and the screen are not lit, it may be caused by the lack of power supply of the machine, the life of the indicator light, and the failure of the inverter. Therefore, when exchanging or performing wiring work, be sure to cut off the power supply and ask a professional technician to operate.
③When the operation power supply of the electrical control cabinet of the machine is connected, the fault indicator does not light. Even if the emergency stop button is pressed, the fault indicator does not light. In addition, when receiving the fault signal of the liquid medicine device, the fault indicator will not light up. If the fault indicator lights up, it may be caused by the following reasons.
- The drive motor of the screw shaft is overloaded.
- Dosing pump overload of polymer flocculant
- Sludge delivery pump overcut
- An error occurred in the inverter of the screw shaft motor
- Overload of mixing tank stirring pump
In case of recovery, please eliminate the cause of the failure. Remove the short-circuit error.
④Do not let the sludge of the sewage storage tank fall below the minimum level. If the liquid level of the sludge is lower than the minimum level, please cut off the main power supply and operation power supply. Before starting the screw press, please check whether the liquid level of the sewage storage tank is in the normal position.
After all the above work is checked, the switch of the operation mode can be adjusted to the automatic position to let the machine run automatically. After all inspections are completed, automatic operation still cannot be performed, please contact our company or agency.
Sludge did not enter the flocculation mixing tank
①Sludge delivery pump does not run.
The failure of the pump to run is due to pump failure. Please contact the pump manufacturer.
②Is there air left in the sludge auxiliary pump?
If the liquid level controller of the sludge storage tank fails, the liquid level controller cannot operate normally, and the air is sucked into the sludge delivery pump, which results in the sludge being not transported normally. Please check the sludge storage tank.
③Is the sludge delivery pump blocked?
Turn off the main power of the machine and check whether the sludge delivery pump is blocked.
④Is the impeller of the sludge shaft pump worn?
Although the pump is running, the sludge cannot be completely transported. It may be caused by the wear of the impeller. This happens. Please contact the pump provider.
⑤Is the sludge in the flocculation tank too full (exceeding the high level of the electrode)? The sludge of the flocculation tank is too full. There is a state of excessive sludge.
In this case, reduce the amount of sludge and adjust the dosing room of the medicine by adjusting the liquid level adjustment tube. The flocculation tank is in a state full of water and will recover after a period of time. If this state of motion is continued, it will repeatedly appear full of water and automatically recover.
This will cause the pump to be in an intermittent working state. Shorten the service life of the pump. Therefore, it is necessary to adjust the sludge delivery volume and the drug delivery house to an optimal value.
Foreign objects adhered to the electrode rods of the flocculation box, resulting in abnormal operation.
A foreign object adhered to the electrode rod and caused a short circuit. It will be mistakenly judged that the full water state caused an erroneous operation. Please remove the foreign object.
⑥Is the valve of the sludge transport pipeline closed or is the pipeline blocked?
Check the switching status of the valve and whether the pipeline is blocked.
Dewatered Sludge cake cannot be drained
①Is there any sludge entering the screw chamber?
Check whether the pipeline connecting the flocculation tank and the screw chamber is blocked.
②The size of alum flower formed in the flocculation box is not suitable?
When the alum flower cannot be formed or cannot be completely formed, the solid matter will be leaked from the gap of the screw chamber. As a result, the recovery rate of the solid matter is reduced, the amount of dewatered sludge cake is reduced, and even no sludge cake is discharged. Please make adjustments to make the sludge form a proper alum.
③Is the clearance of the end plate appropriate?
End plate clearance is. In the state of 0mm (fully closed), the sludge cake cannot be discharged from the discharge port. Please set proper end plate clearance.
④Is the verification motor of screw shaft running normally?
Please check whether the drive motor of screw shaft is running normally.
If the motor does not operate normally, it may be caused by a malfunction of the motor. Please stop the operation of the machine immediately and consult our company or an agency.
⑤Is the rotation direction of the screw shaft verification motor correct?
When replacing the screw chamber, if the wiring of the screw shaft drive motor is wrong, it will cause the motor to reverse. When reversed, the sludge cannot be discharged, which may cause damage to the machine. So if the motor is found to be reversed, please cut off the power supply and check the wiring.
No water from spray
①Is the valve closed?
Check whether the valves of all water supply pipes are open.
②Is there any garbage jam at the sprinkler head?
Remove the sprinkler head. Remove the trash inside.
③Is the solenoid valve for spraying operating normally?
Check if the solenoid valve for spraying is operating normally. If it does not operate normally, it may be caused by a malfunction of the solenoid valve. Please consult our company or an agency.
④Is the power supply for spraying turned on?
In order to protect the solenoid valve for spraying, a switch is provided in the solenoid valve. If the switch is not opened, the solenoid valve will not start.
The moisture content of the Dewatered sludge cake is too high (in the case of smaller alum blossoms)
①Is the concentration of sludge too thick?
When the sludge concentration becomes thinner, the proportion of the solid matter and the added weight of the medicine is out of balance, and a proper alum flower cannot be formed. At this time, combined with the processing capacity of the machine to reduce the amount of sludge and thus the input of solid matter.
②Is the PH value of sludge appropriate?
If the PH value is not appropriate, it is possible that the polymer flocculant cannot fully exert its performance. First confirm the applicable pH range of the polymer flocculant used, and then adjust the PH value of the sludge to an appropriate value.
In addition, the drugs used will reduce the pH of the sludge, resulting in the performance of the polymer flocculant can not be fully developed, in this case. Try to reduce the use of drugs that will reduce the pH of the sludge.
③Has the concentration of the polymer Flocculant solution changed?
As soon as the concentration of the polymer flocculant solution changes, the balance between the solid matter in the sludge and the addition rate of the drug is destroyed. As a result, a proper alum flower cannot be formed.
When using manual foaming, please confirm the dosage of polymer flocculant and dilution water.
When using an automatic medicine dispenser, please confirm whether the set value is consistent with the dosage.
④Is the amount of polymer Flocculant outflow appropriate?
Please stop the machine and discharge all the sludge in the flocculation mixing tank.
Start the polymer Flocculant dosing pump in manual operation mode and check whether the pump discharge volume is consistent with the pump performance curve. Check the results, if there is little or no spitting out. Please check the following items.
- Are there any foreign objects in the pipeline?
- Is there any medicine in the medicine tank?
- Whether the wearing parts of the pump are damaged.
⑤Is there any garbage adhering to the liquid level adjustment pipe in the Gauge tank and the weir?
If garbage is attached to the liquid level adjustment pipe and the weir, it will affect the return of sludge. The ratio of the solid matter in the sludge to the medicine addition room will be out of balance, failing to form a proper alum flower. At this time, please clean the level adjustment tube.
※ If the above measures ① ~ ⑤ still cannot solve the problem, please choose polymer flocculant again.
Please contact our company, agency or sales company of polymer Flocculant.
The water content of the Dewatered sludge cake is too high (in the case of larger alum flowers)
①Has the concentration of sludge become thinner?
When the sludge concentration becomes thinner, the ratio of the solid matter of the sludge to the amount of drug added is out of balance, and a proper alum flower cannot be formed. At this time, combined with the processing capacity of the machine, the amount of sludge is increased to increase the input of solid matter.
②Has the concentration of polymer flocculant changed?
As soon as the concentration of the polymer flocculation solution changes, the balance between the solid matter in the sludge and the amount of drug added is destroyed, resulting in the failure to form a proper alum.
When using manual infusion. Please confirm the dosage of polymer flocculation and the dosage of dilution water.
If too much polymer flocculant is added, the following symptoms may occur.
Wait until the alum flower is adjusted to the proper state. Please check whether the following symptoms have improved.
- Is high-viscosity sludge accumulated around the advection tube?
- Is there any highly viscous sludge adhering to the gap of the screw chamber ring?
- Is the water-concerning function of the screw chamber good?
- Is the filtrate viscous?
- The moisture content of dewated sludge cake decreases, does the negative value (current value) of the motor increase?
③Whether there is garbage adhering around the Gauge tank?
When garbage is attached around the weir, the amount of sludge flowing into the flocculation mixing tank will be reduced, and the proportion of solid matter in the sludge and the amount of drug added will be out of balance, which may cause the alum to become larger. In this case, please sweep around the weir.
※ If the above measures ① ~ ③ are still unable to solve the problem, please update and select polymer flocculation. Please contact our company, agency or sales company of polymer Flocculant.