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S1 series standard inverter
Fault
Fault type
code
Phase loss on input
SPI
Phase loss on
SPO
output side
Overheat of rectifier
OH1
Overheat of inverter
OH2
EF
External fault
485 communication
CE
Current detection
ItE
Motor autotuning
tE
Phase loss or violent
fluctuation occurred to R, S
side
and T input
Phase loss occurred to U, V,
W output (or the three
phases of motor is
asymmetrical)
Air duct is blocked or fan is
module
damaged;
Ambient temperature is too
high;
module
Long-time overload running
External fault input terminal
acts
Baud rate is set improperly;
Communication line fault;
Communication address
fault
error;
Communication suffers from
strong interference
Poor contact of the
connector of control board;
Hall component is damaged;
fault
Exception occurred to
amplification circuit
Motor capacity does not
match with the inverter
capacity, this fault may occur
easily if the difference
between them is exceeds
five power classes;
fault
Motor parameter is set
improperly;
The parameters gained from
autotuning deviate sharply
from the standard
parameters;
Possible cause
-158-
Corrective measures
Check the input power;
Check installation wiring
Check the output wiring;
Check the motor and cable
Ventilate the air duct or replace
the fan;
Lower the ambient temperature
Check external device input
Set proper baud rate;
Check the wiring of
communication interfaces;
Set proper communication
address;
Replace or change the wiring to
enhance anti-interference
capacity
Check the connector and
re-plug;
Replace the hall component;
Replace the main control board
Change the inverter model, or
adopt V/F mode for control;
Set proper motor type and
nameplate parameters;
Empty the motor load and carry
out autotuning again;
Check motor wiring and
parameter setup;
Check whether upper limit
frequency is larger than 2/3 of
the rated frequency
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