30
ESC1
Power module failure
Inverter output short circuit or grounding
Check the motor wiring
9
Instantaneous overcurrent of frequency inverter
See overcurrent countermeasures
Abnormal control panel or serious interference
Seek services from manufacturers
Power device damage
Seek services from manufacturers
E-OH
Overheating radiator
Ambient temperature is too high
Lower ambient temperatures
10
Fan damaged
Replace the fan
Clogged air duct
Clear the air duct
EOL1
Inverter overload
Improper setting of V/F curve or torque boost
Adjust V/F curve or torque lift
11
Grid voltage is too low
Check the grid voltage
Acceleration time is too short
Extended the acceleration time
The motor is overloaded
Choose a frequency inverter with higher power
EOL2
Motor overload
Improper setting of V/F curve or torque boost
Adjust V/F curve or torque lift
12
Grid voltage is too low
Check the grid voltage
The motor is locked or the load mutation is too large
Check the load
Motor overload protection factor is not set correctly
correctly set Motor overload protection coefficient
E-EF
External equipment
fault
External equipment fault input terminal closed
Disconnect External Equipment Fault Input Terminal
and Clear Fault
13
EPOF
Dual CPU
communication failure
CPU communication failure
Seek services from manufacturers
14
EPID
PID feedback
disconnection
Loose PID feedback circuit
Check the feedback connection
15
The feedback amount is less than the disconnection
detection value
Adjust the detection input threshold
E485
RS485
communication failure
Does not match the baud rate of the upper computer
Adjust baud rate
16
RS485 channel interference
Check whether the communication connection is
shielded and the wiring is reasonable. If necessary,
consider connecting the filter capacitor in parallel
Communication timeout
Retry
ETUN
Motor tuning fault
Incorrect setting of motor parameters
Reset the motor parameters
17
ECCF
Current detection fault
Fault of current sampling circuit
Seek services from manufacturers
18
Auxiliary power failure
EEEP
EEFROM reading and
writing error
EEPROM fault
Seek services from manufacturers
19
EPLI
Output phase loss
protection
Output U, V and W are out of phase
Check the output wiring
20
EPAO
Tube bursting fault
The feedback pressure is less than the low pressure
detection threshold or greater than or equal to the
high pressure detection threshold
Check the feedback connection or adjust the high and
low pressure threshold
22