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Charles PriceSep 23, 2025
How to fix a cooling fan fault on a Grundfos Water Pump (IP66 only)?
- EElizabeth HernandezSep 23, 2025
If your Grundfos Water Pump (IP66 only) reports a cooling fan fault, check and replace the cooling fan.
How to fix a cooling fan fault on a Grundfos Water Pump (IP66 only)?
If your Grundfos Water Pump (IP66 only) reports a cooling fan fault, check and replace the cooling fan.
Why is there an under voltage on the DC bus of my Grundfos MP 1 / Redi-Flo2 Water Pump?
If your Grundfos Water Pump shows an under voltage on the DC bus, it could be due to a low incoming supply voltage. This often happens when the power is disconnected. However, if it occurs while running, check the incoming power supply voltage and all components in the power feed line to the drive.
What causes an output over current in a Grundfos MP 1 / Redi-Flo2?
If your Grundfos Water Pump displays an output over current error, it indicates an instantaneous over current on the drive output, often caused by excess load or shock load on the motor.
What does motor thermal overload (I2t) mean on a Grundfos Water Pump?
If the Grundfos Water Pump drive reports a motor thermal overload, it means the drive has been delivering more than 100% of the value in P-08* for an extended period to protect the motor from damage.
How to fix an autotune fault on a Grundfos Water Pump?
If your Grundfos Water Pump indicates an autotune fault, check the motor cable and connections for continuity. Also, ensure all three phases of the motor are present and balanced, as the motor parameters measured through the autotune may not be correct.
What to do if Grundfos MP 1 / Redi-Flo2 Water Pump shows 4-20mA Signal Lost?
Check the analog input connection(s).
How to troubleshoot faulty thermistor on heatsink in Grundfos MP 1 / Redi-Flo2 Water Pump?
If your Grundfos Water Pump displays a faulty thermistor on heatsink error, check the analog input connection(s).
What to do if Grundfos Water Pump displays internal memory fault (IO)?
Press the stop key. If the fault persists, consult you supplier.
How to fix brake channel over current in Grundfos Water Pump?
If your Grundfos Water Pump displays a brake channel over current error, check the condition and connection wiring of the external brake resistor.
How to troubleshoot Modbus comms loss fault in Grundfos MP 1 / Redi-Flo2 Water Pump?
If your Grundfos Water Pump shows a Modbus comms loss fault, check the incoming Modbus RTU connection cable. Ensure that at least one register is being polled cyclically within the timeout limit set in P-36 Index 3*.
General| Brand | Grundfos |
|---|---|
| Model | MP 1 / Redi-Flo2 |
| Category | Water Pump |
| Language | English |
Details the intended uses and limitations for purging and sampling contaminated groundwater.
Notes that the pumping system is not explosion-proof and advises consulting local authorities.
Emphasizes the need for personal safety equipment when pumping hazardous material.
Outlines warranty coverage for installations adhering to instructions and codes of practice.
Advises caution when handling motor cables and electrical connections, following local regulations.
Specifies that only uncontaminated pumps can be returned for servicing.
Details how the pump is cleaned and packaged after production to ensure cleanliness.
States the converter should be handled carefully as sensitive electronic equipment.
Specifies storage temperature range and cleaning requirements before storing the pump.
Specifies storage temperature range for the converter in a clean and dry area.
Provides instructions on pump assembly, positional requirements, and valve installation considerations.
Specifies minimum and maximum borehole diameter requirements and use of cooling jackets.
Defines the maximum allowable dynamic water level during pump operation.
Procedure for checking and filling demineralised water in the motor before installation.
Details on connecting pipes or hoses to the pump's discharge port.
Instructions on how to lower the pump into the borehole without damaging the motor cable.
Specifies the necessary submersion depth for motor cooling and shaft seal lubrication.
Guidelines for placing the converter vertically to ensure air circulation and prevent water entry.
Explains the function of the three operational buttons on the converter keypad for pump control.
Details how to connect the pump's motor cable to the converter's power/motor cable safely.
Steps for starting the converter and setting the pump to the desired direction of rotation.
Instructions on adjusting pump speed using the converter's speed control button.
Guidance on adjusting pump speed and allowing it to stabilize before making further changes.
Highlights the importance of maintaining minimum flow for motor cooling and avoiding pump damage.
Procedure for safely switching off the converter before disconnecting the motor cable after use.
Presents performance curves showing flow rate versus head at different frequencies for the MP 1 pump.
Instructions for routine maintenance, including decontamination, cleaning, and replacement of wear parts.
Details service requirements, emphasizing that only uncontaminated pumps are accepted and certification is needed.
Provides a component breakdown and overview of the MP 1/Redi-Flo2 sampling pump system.
Step-by-step procedure for safely taking apart the pump and its components.
Instructions for inspecting dismantled pump parts for wear, corrosion, and fractures.
Detailed procedure for reassembling the pump, ensuring correct fitting of seals, impellers, and components.
Step-by-step guide for removing and installing a new motor cable for the pump.
Instructions on connecting the motor cable wires and securing the plugs correctly.
Procedure for shortening motor cables with individual lead sheaths, specifying lengths.
Fitting plug pins to the motor cable leads and securing them firmly.
Observing the pump shaft movement to verify the correct direction of rotation.
