In the process of using the grinder, it is inevitable that you will encounter faults. Very often you can see some fault codes on the display screen, as shown in the figure below. So, what fault code is this? It turns out that this is the "three-phase missing one phase" in the incoming power failure. Then let's learn how to eliminate the lack of phase in the power input.

There are some fault codes for lack of phase: E.rr1, E.ILF, R.ILF, PHL, OrP

1. Check whether the power wiring and the air switch wiring are loose or disconnected；

2. Measure whether the output voltage of the power supply wiring switch is within the use range of the equipment；

3. Use a multimeter to measure whether the output voltage of the power plug is within the use range of the device；

4. Use a multimeter to measure whether each line of the power supply wiring is connected to ensure that each line of the power supply wiring is normally energized；

5. Check whether the power cord socket and the inverter connection plug are connected in place；

6. Check whether the power cord plug and the inverter power plug are in poor contact or burned out；

7. Open the back cover of the variable control box and the inverter wiring cover, and check whether the R, S, and T wiring of the inverter's power input terminals are loose or disconnected；

8. Check whether the power cord socket connection is off.

If the power supply is short of phase next time, you can find the corresponding reason and treatment method according to the summed up by Xingyi Machinery for you.
Xingyi Machinery is a professional manufacturer of floor grinding machinery, focusing on after-sales service, patient service, never perfunctory, don't be afraid of machine problems, we not only provide maintenance, but also provide maintenance technical guidance.