uFault Information and Troubleshooting Method
NO Fault
Code
Fault
Description Cause and Solutions of Fault Recovery
Procedure
1 P0 Hardware
Overcurrent
★Motor model is mismatch, please choose
matching pumps.
★UVW three-phase short-circuit
connection, please rewiring to ensure the
normal installation of UVW.
Automatically
remove after 30s
2 P43 Phase
Protection
UVW three-phase open circult, please
rewiring to ensure it reliable contact.
Automatically
remove after 30s
3 P46 Stall
Protection
★Motor model is mismatch, please choose
matching pumps.
★Pump extension cord is too long. Please
reduce the extension cord.
★Power is too low, increase the power
supply.
★Pump bearing is stuck, please clean
pump bearings.
Automatically
remove after 30s
4 P49 Software
Overcurrent
★Water pump bearing stuck, clean pump
bearings.
★UVW three-phase short-circuit
connection, please rewiring to ensure the
normal installation of UVW.
Automatically
remove after 30s
5 P50 Low Voltage
Protection
The input voltage is too low, please
distribute power refer to the electrical
characteristics.
Voltage return to
normal, remove the
fault immediately
6 P51 High Voltage
Protection
The input voltage is too low, please
distribute power refer to the electrical
characteristics.
Voltage return to
normal, remove the
fault immediately
7 P48 Dry-run
Protection
★Not all of air in the pump is exhausted,
cut off the power, re-power and start the
pump drainage after 30 seconds.
★There is no water in the water tank
waiting for water, it will restart.
Automatically clear
after 30 minutes or
re-power to clear
8 P60 High Temperature
Protection
The temperature of controller MCU is more
than 90℃.
Automatically clear
after the temperature
is normal
9 E8 Current Sampling
Failure
Cut off the power and restart after 30
seconds. Restart the power
10 PL Power Shortage
★No sunlight, waiting for the sunllight to
restart.
★Solar panel matching error, refer to the
recommendation to match correctly.
At the first 5 times, it
will removal after 30
seconds, and then
30 minutes to
rempval
11 ALARM Reverse connection
protect Exchange the positive and negative wire. Restart the power
12 P42 Start fault 1-7 fault, appear continuously for several
times in 10 minute. Check NO.1-7 fault. Restart power
10