Chapter6 Troubleshooting
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193
Fault
display
Name of
protection
Possible reasons of fault
Actions
EF0
External fault
comes from
RS485 serial
communicatio
n
EF1
External fault
on terminals
X1
～
X8
●
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
●
Check input terminals, if
the fault appeared even
when the terminals aren’t
used, please, seek tech
support
SP1
Input phase
failure or
Unbalance
●
Input R, S, T have
phase loss or imbalance
●
Check input voltage
●
Check input cable
connection
SP0
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
CCF1
Control circuit
fault0
●
The ac drive connect
keyboard once after
electrifying, then
transmitting fault
continue for 2 seconds
or above(during
operating)
CCF2
Control circuit
fault1
●
Transmission between
the ac drive and
keyboard is established
once after supplying
power, but later
transmission fault
continues for more than
2 seconds.
●
Reconnect the keyboard
●
Check connection cable of
keyboard
●
Replace the keyboard
●
Replace the control board
CCF3
EEPROM
fault
●
EEPROM fault of the
control board
●
Replace the control board
CCF4
AD
conversion
fault
●
AD conversion fault of
the control board
●
Replace the control board
