Grundfos GI SPC 03 65 10, Installation And Operating Instruction

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28
Eng
lish
(G
B)
8 Fault finding
8.1 Fault codes and remedies
Fault
Code
Fault type
Possible cause
Remedy
OV1
Overvoltage when
acceleration
1.
The input voltage is
abnormal.
2.
There is large energy
feedback.
3.
No brake components.
4.
Braking energy is not open.
1.
Check the input power.
2.
Check if the DEC time of the load is too short or the pump
controller starts during the rotation of the motor or it needs
to increase the energy consumption components.
3.
Install the brake components.
4.
Check the setting of related function codes.
OV2
Overvoltage when
deceleration
OV3
Overvoltage when
constant speed running
OC1
Overcurrent when
acceleration
1.
The acceleration or
deceleration is too fast.
2.
The voltage of the grid is too
low.
3.
The power of the inverter is
too low.
4.
The load transients or is
abnormal.
5.
The grounding is short
circuited, or the output is
phase loss.
6.
There is strong external
interference.
7.
The overvoltage stalls
8.
protection is not open.
1.
Increase the ACC time.
2.
Check the input power.
3.
Select the pump controller with a larger power.
4.
Check if the load is short circuited (the grounding short
circuited or the wire short circuited) or the rotation is not
smooth.
5.
Check the output configuration.
6.
Check if there is strong interference.
7.
Check the setting of related function codes.
OC2
Overcurrent when
deceleration
OC3
Overcurrent when
constant speed running
UV Bus undervoltage
1.
The voltage of the power
supply is too low.
2.
The overvoltage stalls
3.
protection is not open.
1.
Check the input power of the supply line.
2.
Check the setting of related function codes.
OL1 Motor overload
1.
The voltage of the power
supply is too low.
2.
The motor setting rated
current is incorrect.
3.
The motor stall or load
transients are too strong.
1.
Check the power of the supply line.
2.
Reset the rated current of the motor.
3.
Check the load and adjust the torque lift.
OL2 Inverter overload
1.
The acceleration is too fast.
2.
The rotating motor is reset.
3.
The voltage of the power
supply is too low.
4.
The load is too heavy.
5.
The motor power is too
small.
1.
Increase the ACC time.
2.
Avoid the restarting after stopping.
3.
Check the power of the supply line.
4.
Select an pump controller with bigger power.
5.
Select a proper motor.
SPI Input phase loss
Phase loss or fluctuation of
input R, S, T
1.
Check input power.
2.
Check installation distribution.
SPO Output phase loss
U, V, W phase loss output (or
serious asymmetrical three
phase of the load)
1.
Check the output distribution.
2.
Check the motor and cable.
OH1 Rectifier overheat
1.
Air duct jam or fan damage
2.
Ambient temperature is too
high.
3.
The time of overload running
is too long.
1.
Dredge the wind channel or change the fan.
2.
Decrease the environment temperature.
OH2 IGBT overheat