Inverter control cabinet faults and problems and solutions Frequency inverter control cabinet faults and problems and solutions 1. When the inverter starts to 5 ~ 10HZ, the inverter reports that the inlet impeller has foreign matter (generally occurs in the newly installed pump, the submersible pump in the installation process) There is sediment in the middle wall.) Remedy: Start directly with the power frequency for 2 to 5 minutes, and go to the frequency conversion operation.
2. The inverter does not start. The common faults are (1) the incoming power supply phase loss or the fuse inside the cabinet (insurance) is damaged. (2) Check the contactor coil for burnout. The check method is to remove the contactor coil and put it aside. Find two wires directly connected to
On the coil, give the 220v power supply to see if the contactor is closed. If it is burnt out, replace it with a new one.
3. The setting pressure of the inverter is not the same as the reading of the remote pressure gauge. According to the customer's request, the remote pressure gauge (actual pressure) shall prevail. If the customer has doubts, explain to the customer that the signal attenuation causes errors (signal line length, nearby electromagnetic interference, etc.).
4. The inverter runs for 50HZ for a long time, and the pressure gauge does not work. (1) Pressure gauge line break (2) Ask if the customer has changed the inverter parameters, if it has been changed (contact the technical department)
5. The inverter display is zero, the pump does not operate (1) Check whether the pressure on the pressure gauge is greater than the pressure value set by the inverter (when the remote inspection pressure gauge coil is frozen in winter), the pressure gauge is damaged and replaced.
(2) Whether the contactor is sucked or not (3) Whether the inverter reports a fault, turn off the power and start from a new one.
6. The inverter reports internal faults, see attached table
Common faults and problems in pressure tanks and control boxes
1. The pressure tank is frequently started. (1) The upper limit pressure and the lower limit pressure of the electric contact pressure gauge are too small to increase the pressure range. (2) The leaking part of the pressure tank causes the water in the pressure tank to be too full, and there is no air pressure space. Put all the water clean (be sure to open the upper air intake) to find the leaking part is tight. How to find the leaking part (find a piece of soap or washing powder into the water to form soapy water, apply soapy water to the area where air leakage may occur, if there is a bubble to prove that the place is leaking)
2. The control box does not start (1) Check if the switch in the control box is in the closing position, (2) Check if the incoming line power is available (3) Check if the control box and the electric contact pressure gauge connection line are correct.
3. The control box does not operate automatically (1) First, use the simple method to check whether the control box has quality problems. First remove the three signal wires connected to the pressure gauge and close the switch. At this time, the motor may or may not operate. Short-circuit the middle and low terminals. At this time, the pump must run, then disassemble, short the middle and high terminals. The pump stops when it is stopped. (Notes may be delayed for 3-5 seconds.) If there is a problem with the above operation, it means that the control box has quality problems and is exchanged. (2) Check the wiring of the electric contact pressure gauge and whether the meter pointer is oxidized, causing the internal connection of the pressure gauge to be unreachable.
4. Electric contact pressure gauge adjustment
1. Pressure adjustment: There is a black knob in the middle of the pressure gauge to adjust the lower limit pressure, and the outer ring is to adjust the upper limit pressure.
Four-party inverter pressure adjustment operation
Press the SET button on the operation panel of the inverter. At this time, F0.00 is displayed on the operation panel. Press << (Shift key) to make F 0.00 flash, press △ ▽ to find 8, and then press F8.00 to press << (Shift key) Make F8.00 flash, press △▽ key to find 2, then display F8.02. This value is the pressure setting parameter. Press the SET button on the operation panel to display the current pressure value. Press the △▽ key to adjust to the desired pressure value. Press the SET button to save and press ESC to return. At this time, the operation panel displays the frequency value and current value.
Shirisi inverter pressure adjustment operation
Press ENTER on the operation panel of the inverter, press △▽, press △ to increase the pressure, press ▽ to decrease the pressure, set the parameters, press ENTER to save, press MODE to return. At this time, the operation panel displays the frequency value and current value.
Japanese industry inverter pressure adjustment operation
Press the MODE button on the operation panel of the inverter. At this time, P01-00 is displayed on the operation panel. Press JOG (Shift key) to make D 01-00 flash. Press △ ▽ to find 05. At this time, P05-00 is pressed. (Shift key) Make P05--00 flash, press △▽ key to find 03, then display P05-03. This value is the pressure setting parameter. Press the ENTER key on the operation panel to display the current pressure value. Press the △▽ key to adjust to the desired pressure value. Press the ENTER key to save and press the MODE key to return. At this time, the operation panel displays the frequency value and current value.
Scenery frequency converter pressure adjustment operation
Adjust the pressure potentiometer on the panel.
Fuji inverter pressure adjustment operation
Press △ 直接 key directly, press △ to increase the pressure, press ▽ to decrease the pressure
Microcomputer time switch setting
1. Press the Cancel/Resume button four times to cancel the keyboard lock function, a blanking.
2. Press the “Timer†button, the word “1ON†appears on the lower left of the LCD screen (indicating the first time), then press the “School Time†button and the “School†button to enter the desired opening time. Press the “Timer†button again, “1OFF†appears on the bottom left of the LCD screen (indicating the first off time), then press the “School Time†button and the “School†button to enter the time required for the shutdown. 3. Continue to press the “Timer†button. The lower left of the display will display (2ON, 2OFF, „8ON, 8OFF) in sequence. Refer to the above steps to set the switching time of the other groups.
4. If you only turn on and off once a day, you must press the “Cancel/Resume†button to eliminate the time of the remaining groups, so that the LCD displays “┅:â”… pattern.â€
5. After the timing is set, press the “Clock†button to make the LCD display the current time and the setting is completed.
6. Press the “Auto/Manual†button to turn the circuit on and off directly. To make the switch operate automatically, press this button to turn the arrow at the bottom of the display to the “off†position, then turn the arrow at the bottom of the display to the “auto†position. At this time, the time switch can be set according to the setting. Time work to achieve automatic control.
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