dolycon CT112 Series - Chapter 5 Troubles Shooting

Solar Pump Inverter Chapter 5 Troubles Shooting
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Chapter 5 Troubles Shooting
5.1 Main Circuit Terminals
Fault Code P.OFF Fault Type Power Off
Reason External power supply close Solution
Check the three-phase power is
off or not
Fault Code
E.Out1
Fault Type
IGBT Ph-U fault
E.Out2 IGBT Ph-V fault
E.Out3
IGBT Ph-W fault
Reason
Acc/Dec time is too short
Solution
Increase Acc/Dec time
IGBT module fault
Ask for support
Malfunction caused by
interference
Inspect external equipment and
eliminate interference
Ground is not properly
Fault Code E.oC1 Fault Type Over-current when acceleration
Reason
Acc time is too short
Solution
Increase Acc time
Input voltage is too low
Check the power supply
Capacity of inverter is too
small
Select bigger capacity inverter
Fault Code
E.oC2
Fault Type
Over-current when deceleration
Reason
Dec time is too short
Solution
Increase Dec time
Load is too heavy
Install proper external braking unit
Capacity of inverter is too
small
Select bigger capacity inverter
Fault Code E.oC3 Fault Type
Over-current when constant speed
running
Reason
Sudden change of load or
abnormal
Solution
Check the load or reduce sudden
change of load
Input voltage is too low
Check the power supply
Capacity of inverter is too
small
Select bigger capacity inverter
Fault Code E.oU1 Fault Type Over-voltage when acceleration
Reason
Input voltage abnormal
Solution
Check the power supply
After instant power off,
restart the rotating motor
Void restart after power off
Fault Code E.oU2 Fault Type Over-voltage when deceleration
Reason
Dec time is too short
Solution
Increase Dec time
Load is too heavy
Increase braking resistance /unit
Input voltage abnormal
Check the power supply
Fault Code E.oU3 Fault Type
Over-voltage when constant
speed running
Reason
Input voltage abnormal
Solution
Install input DC reactor
Load is too heavy Install proper external braking unit
Fault Code
E.LU
Fault Type
DC bus Under-voltage
Reason
Input voltage is too low
Solution
Inspect the input power supply