The control failure of the bottom pump mainly refers to the inability of its speed, pressure or temperature to perform stably according to the instructions, usually due to the electrical and signaling system.
Main reasons:
1. Signal input/output failure: The core sensor (speed, pressure, temperature) is damaged, the signal line is interfered with, or the wiring is loose, causing the PLC to receive incorrect data.
2. Abnormal drive/frequency converter: Self-fault, incorrect parameter setting or overheating protection, unable to drive the motor correctly.
3. Safety interlock triggering: The safety procedure is triggered when the process conditions are not met (such as over-temperature, over-pressure, lubrication failure), and the system is prohibited from starting or forcibly stopping.
4. Power supply problems: unstable power supply or poor contact with the control loop.
Solution:
1. Check the alarm code: First, check the specific fault prompt of the control cabinet touch screen or frequency converter.
2. Check the sensor and line: Check whether the value of the key sensor is reasonable and check the line connection.
3. Nuclear parameters and interlocks: Confirm that all control parameters and safety interlock conditions (such as valve status) have been met.
4. Reset and restart: After eliminating physical faults, safely reset the drive. If the problem persists, it needs to be overhauled by professional electrical personnel.