INVT SPC Series User Manual

SPC Series Solar Pump Inverter Fault diagnosis and solution
-50-
7 Fault diagnosis and solution
Do as follows if the inverter encounters a fault:
1. Check whether there is any exception on the keypad. If yes, contact the local INVT
office.
2. If no, check function group P07 to view the fault record parameters and understand
the actual condition.
3. See the following table for a detailed solution and check for exceptions.
4. Rectify the fault or ask for help.
5. Ensure the fault has been rectified, perform fault reset, and run the inverter again.
Fault code
Fault type
Possible cause
Solution
OV1
Overvoltage
during ACC
 The input voltage is
abnormal.
 There is large energy
feedback.
 No braking
components.
 Energy-consumption
braking is not
enabled.
 Check the input power.
 Check whether the
loaded DEC time is too
short or the inverter
starts when the motor is
rotating.
 Install the braking
components.
 Check the setting of
related function codes.
OV2
Overvoltage
during DEC
OV3
Overvoltage
during constant
speed running
OC1
Overcurrent
during ACC
 The acceleration or
deceleration is too
fast.
 The voltage of the
grid is too low.
 The power of the
inverter is too low.
 The load transients
or is abnormal.
 There is to-ground
short circuit or output
phase loss.
 There is strong
external interference.
 The overvoltage stall
protection is not
enabled.
 Increase the ACC time.
 Check the input power.
 Select the inverter with
larger power.
 Check whether there is
short circuit (to-ground
or inter-wire) in the load
or the rotation is not
smooth.
 Check the output
wiring.
 Check whether there is
strong interference.
 Check the setting of
related function codes.
OC2
Overcurrent
during DEC
OC3
Overcurrent
during constant
speed running

INVT SPC Series Specifications

General

Brand	INVT
Model	SPC Series
Category	Inverter
Language	English