dolycon CT112 Series - Page 45

Solar Pump Inverter Chapter 5 Troubles Shooting
41
Fault Code E.oL1 Fault Type Motor overload
Reason
Input voltage is too low
Solution
Inspect the input power supply
Improper motor’s overload
protection threshold
Set proper motor rated current
Motor block or sudden
change of load
Check the load and adjust torque
boost
Motor drive heavy load at
low speed for a long time
Select variable frequency motor
Fault Code E.oL2 Fault Type Inverter overload
Reason
Acc time is too short
Solution
Decrease acceleration
Restart the rotating motor Avoid restart after power off
Input voltage is too low
Check the power supply
Load is too heavy Select bigger capacity inverter
Fault Code
E.SPI
Fault Type
Input phase failure
Reason Phase loss of R,S,T input Solution
1.Check power supply
2.Check the wiring installation
Fault Code
E.SPo
Fault Type
Output phase failure
Reason
Phase loss of U,V,W output
(or a serious unbalance in
3phase input)
Solution
Check the wiring installation of
output
Connection loose
Check the motor and wiring
Fault Code
E.oH1
Fault Type
Rectify overheat
E.oH2
IGBT overheat
Reason
Instant over current of
inverter
Solution
Refer to over current solution
Short-circuit or ground fault
occurred at inverter output
Check the wiring and install again
Obstruction of ventilation
channel or Cooling fans of
inverter stops or damaged
Clear the ventilation Channel or
Replace cooling fan
Ambient temperature is too
high
Reduce Ambient temperature
Control board wire or
plug-ins loss
Check the wiring and Installation
Auxiliary power damaged or
under voltage of driver
voltage
Ask for support
Power module bridge short Ask for support
Control board abnormal
Ask for support
Fault Code E.EF Fault Type External fault
Reason
SI External fault input
terminal take effect
Solution
Inspect input of external
equipment
Fault Code
E.CE
Fault Type
Communication fault
Reason
Improper baud rate setting
Solution
Set proper baud rate
Receive wrong data
Press STOP/RESET to reset. Ask
for support
Communication is nterrupted
for long time
Check wiring of communication
interface