User Manual
EM303A General Purpose Inverter
124
Ol
Overload
1. Acceleration/deceleration time is too
short.
2. In V/F control mode, the setting value
of torque boost is too big.
3. Load is too heavy.
1.
Prolong acceleration/deceleration
time.
2.
Reduce setting value of torque
boost.
3.
Replace with the inverter which
is applicable to the load.
OH
Heatsink
Overheating
1. Ambient temperature is too high.
2. Poor ventilation.
3. Cooling fans are broken down.
1.
The service environment of
inverter should meet
requirement.
2.
Improve environmental
ventilation, and check if the vent
of inverter is blocked.
3.
Replace air cooling fan.
EHT
External
Fault
1. External device fault terminal is on.
1. Check external device.
PUP
PID Upper
Limit
1. Process PID feedback signal exceeds
the setting upper limit.
1. Check PID signal and device.
PDN
PID Lower
Limit
1. Process PID feedback signal exceeds
the setting lower limit.
1. Check PID signal and device.
EED
Inverter
EEPROM
Failure
1. Interference makes EEPROM
read-write mistakes.
2. EEPROM is damaged.
1. Press STOP/RESET button to
reset, and then retry.
2. Technical support is required.
EEU
Keypad
EEPROM
Failure
STP
Autotuning
Cancelled
1. During autotuning, press STOP/RESET
button.
1. Press STOP/RESET button to
reset.
SFE
Autotuning
Coast-to-stop
1. When FRS=ON, the external terminal is
off during autotuning.
1. Press STOP/RESET button to
reset.
SrE
Stator
Resistance
Error
1. Motor is not connected to the output
terminals of inverter.
2. Motor is on load.
3. Motor fails.
1. Check connection between
inverter and motor.
2. Motor is offloaded.
3. Check motor.
SIE
Idling
Current Error
When inverter trips faults as stated above, press STOP/RESET button or use reset
terminal to clear fault. If the fault is cleared, inverter will return the function setting
state. Otherwise, the trip code will be displayed on LED continuously.
When faults trip in operation, if fault retry (set by FC-24) is enabled, the inverter will
reset fault automatically and try to run after certain setting interval time (set by FC-25).
FC-24 sets the retry times of fault reset. If the fault times exceeds the setting value
within 30 seconds, and then the inverter stops retry and keeps in fault status.
