User manual

Chapter6 Troubleshooting
Fault
display
Name of
protection
Possible reasons of fault Actions
External fault
comes from
RS485 serial
communicatio
n
●MODBUS serial
transmission error
●Faults comes from
external control circuit
●Set correct overtime
detecting time or set
overtime detecting time of
Pb.03 to 0.0s
●Check external control
circuit
EF0
●Check input terminals, if
the fault appeared even
when the terminals aren’t
used, please, seek tech
support
EF1
External fault
on terminals
X1～X8
SP1
Input phase
failure or
Unbalance
●Input R,S,T have phase
loss or imbalance
●Check input voltage
●Check input cable
connection
Output phase
failure or
Unbalance
●Output U,V,W have
phase loss or imbalance
●Check output cable
connection
●Check the insulation of the
motor and cables
SP0
Control circuit
fault0
●The inverter connect
keyboard once after
electrifying, then
transmitting fault
continue for 2 seconds
or above(during
operating)
●Reconnect the keyboard
●Check connection cable of
keyboard
●Replace the keyboard
CCF1
●Replace the control board
CCF2
Control circuit
fault1
●Transmission between
the inverter and
keyboard is established
once after supplying
power, but later
transmission fault
continues for more than
2 seconds.
CCF3
EEPROM
fault
●EEPROM fault of the
control board
●Replace the control board
AD
conversion
fault
CCF4
●AD conversion fault of
the control board
●Replace the control board
187