PRODUCT
We offers a wide range of pump control panel & pump control accessories for the pump control and protection market.
L922-B
Automatic stops the pump in the case of water shortage, protecting it from dry running without installing float switch or liquid probe in the well
Category：
keyword：
Clamp
Product Details
Features
- Double pumps control
main pump / standby pump automatically alternate
main pump / standby pump automatically switch against malfunctions
standby pump participate running if required
- Present pressure transmitter with 0.5-4.5V analog signal
- Easily setting the different pressure value and observing the dynamic pressure value
- Eliminates the pressure switches: pressure setting for two pumps; pressure setting for one pump
- Automatic stops the pump in the case of water shortage, protecting it from dry running without installing float switch or liquid probe in the well
- Auto / Manual switch
- Protect the pump against many faults
- Dynamic LCD displaying the real pressure value
- Dynamic LCD displaying pump running information
- Pump accumulative running time displaying
- Pump last five fault record displaying
- Pump shaft anti rust
- Present remote monitor
- Present one dry contact point
- Pump start time delay(Time settable)
- Pump stop time delay(Time settable)
- Wifi module(Optional)
- A/B pump operation enable or disable function
Technical parameter
| Main technical characteristic | |
| Control characteristic | pressure control |
| Control method | Manual/Auto |
| Pressure control characteristic | Pressure transmitter with 0.5-4.5V Analog Signal |
| Main technical data | |
| Rated output power | refer to the nameplate |
| Rated input voltage | refer to the nameplate |
| Trip response time of over load | 5sec-5min |
| Trip response time of open phase | <2sec |
| Trip response time of short circuit | <0.1sec |
| Trip response time of under/over voltage | <5sec |
| Trip response time of dry run | 6sec |
| Recovery time of over load | 5min |
| Recovery time of under/over voltage | 2min |
| Recovery time of dry run | 30min |
| Trip voltage of over voltage | 115% of the rated input voltage |
| Trip voltage of under voltage | 80% of the rated input voltage |
| Liquid level transfer distance | ≤20m |
| Protection function |
Dry run Pump stalled Over load Short circuit Under voltage Repeated start Pump shaft rust protection Over voltage |
| Main installation data | |
| Working temperature | -25℃--+55℃ |
| Working humidity | 20%-90%RH |
| Degree of protection | IP54 |
| Install position | Horizontal |
| Unit dimensions(LxWxH) | 31x22x12cm |
| Unit weight (net) | 3.6kg |
| RS485 technical data | |
| Physics Interface | RS485 Bus Interface: asynchronism semiduplex |
| Baud rate |
1200 bps、2400 bps、4800 bps、9600bps Default: 9600bps |
| Protocol type | MODBUS Protocol(RTU) |
Trouble shooting guide
|
Fault Message |
Possible Cause |
Solutions |
|
flashing of
|
the real running voltage is lower than the calibrated voltage, pump is in under voltage protection state | report low line voltage to the powersupply company |
| product will attempt to restart the pump every 5minutes until line voltage is restored to normal | ||
|
flashing of
|
the real running voltage is higher than the calibrated voltage, pump is in over voltage protection state |
report highline voltage to the power supply company |
| product will attempt to restart the pump every 5minutes until line voltage is restored to normal | ||
|
flashing of
|
pump motor running ampere increasing was greater than the normal running ampere (calibrated ampere) by more than 200% | cut off power supply & repair or replace pump immediately |
|
flashing of
|
the real running ampere is higher than the calibrated running ampere, pump is in over load protection state | product will attempt to restart the pump every 30minutes until running ampere is restored to normal |
| pump impeller is jammed / pump motor dragging / pump bearing broken |
check pump impeller or bearing |
|
|
flashing of
|
parameter calibration not completed |
refer to parameter calibration setting |
|
flashing of
|
liquid level in the well / sump is below the pump intake, pump stops running | controller will attempt to restart the pump every 30minutes until liquid level above the pump intake |
|
flashing of
|
pump starts more than 5times per minutes | The most common cause for the rapid cycle condition is a waterlogged tank Check for a ruptured bladder in the water tank. Check the air volume control or snifter valve for proper operation. Check the setting on the pressure switchand examine for defects Cut off the power supply & repair the water tank,pressure switch or valve |
|
|
no communication link between SC / computer and controller |
connecting the product to SC / computer to realize long distance monitoring |
Installation
Electrical connection to the power supply line and electrical pump
- DANGER Electric shock risk
Before carrying out any installation or maintenance operation, the productshould be disconnected from the power supply and one should wait at least 2 minutes before opening the appliance.
- Never connect AC power to output L1 N1 L2 N2 terminals.
- Don't put wire, metal bar filaments etc into the controller.
- Ensure the motor, controller and power specifications matching.
- The electrical and hydraulic connections must be carried out by competent, skilled, qualified personnel.
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