SI21 Solar Pump VFD Manual
15
●Check 3-phase power supply
wiring.
E.oLF
Output phase
loss
●3-phase output power open
phase
●Check 3-phase output voltage
and current.
●Check wiring.
E.Gnd
Output earth
terminal
short circuit.
●Check wiring and
insulation.
●Output earth
E.HA
L
Current
detection
fault
●Detect circuit fault.
●Phase imbalance
●Seek support from factory
●Check motor and wiring.
Rs485co
mmunicat
ion fault
●Unsuitable
baud rate
setting.
● wire
breaks.
●Set suitable baud rate
setting.
●Check communication
wire.
●Make sure right
communication format.
●RS485communication fault
A.LU1 A.LU1
Bus voltage
too low
Bus voltage too low
Check if the AC or DC voltage is
sufficient
