INVT SPC Series User Manual

SPC Series Solar Pump Inverter Fault diagnosis and solution
-51-
Fault code
Fault type
Possible cause
Solution
UV
Bus undervoltage
fault
 The voltage of the
grid is too low.
 The overvoltage stall
protection is not
enabled.
 Check the grid input
power supply.
 Check the setting of
related function codes.
OL1
Motor overload
 The grid voltage is
too low.
 The motor rated
current is set
incorrectly.
 The motor stall
occurs or the load
transient is too large.
 Check the grid voltage.
 Reset the motor rated
current.
 Check the load and
adjust the torque boost
quantity.
OL2
Inverter overload
 The ACC is too fast.
 The rotating motor is
reset.
 The grid voltage is
too low.
 The load is too
heavy.
 The motor power is
too small.
 Increase the ACC time.
 Avoid the restarting
after stop.
 Check the grid voltage.
 Select an inverter with
larger power.
 Select a proper motor.
SPO
Phase loss on
output side
 Phase loss output
occurs to U, V, W (or
the three phases of
the load are seriously
asymmetrical).
 Check the output
wiring.
 Check the motor and
cables.
OH2
Inverter module
overheat
 Air duct jam or fan
damage occurs.
 Ambient temperature
is too high.
 The time of overload
running is too long.
 Dredge the vent duct or
replace the fan.
 Lower the ambient
temperature.
EF
External fault
 SI external faulty
input terminal action.
 Check external device
input.
CE
RS485
communication
fault
 The baud rate setting
is incorrect.
 A fault occurs to the
 Set a proper baud rate.
 Check the
communication

INVT SPC Series Specifications

General

Brand	INVT
Model	SPC Series
Category	Inverter
Language	English