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Fault diagnosis and countermeasures
Fault name
Incorrect initial position
Display panel
Err51
Check fault cause 1. Motor parameter deviates largely from actual value
Fault handling
1. Reconfirm if motor parameters are correct especially if setting of rated current is small
method
8.2 Common faults and handling methods
Below fault s may occur during using process of frequency convertor, please refer to below methods for
simple fault analysis:
No.
Fault phenomenon
No display
1
when
electrifying
Display HC
2
when
electrifying
Display
3
"
when
"Err23
electrifying
Normal display
when electrifying,
"
display "HC
4
after operation
and
shut down
Frequent alarm of
Err14 (overheating
5
module)
Motor doesn't
rotate after
6
frequency
convertor operates
Invalid DI
7
terminal
Motor speed can't
promote when
8
closed-loop vector
controls
Frequent alarm of
overvoltage and
9
over-current fault
Specification of high-performance vector convertor
Figure 8-1 Common faults and handling methods
Possible causes
No or too low network voltage ; fault of
switch power on driver board of frequency
convertor; rectifier bridge is damaged; buffer
resistance
of
frequency
damaged; fault of control panel and
keyboard; disconnected wiring between
control panel, driver board and keyboard;
Bad contact between driver board and
control panel; Related devices on control
panel are damaged; to-ground short-circuit
of motor or motor line; Hall fault; too low
network voltage ;
To-ground short-circuit of motor or output
line; frequency convertor is damaged;
Fan is damaged or blocked; short-circuit
wiring of peripheral control terminal;
Higer setting of carrier frequency; fan is
damaged or air channel is blocked; internal
devices of frequency convertor are damaged
(thermocouple or others)
Motor and motor line; wrong parameter
setting of frequency convertor (motor
parameter); bad contact between driver
board and control panel; fault of driver board
Wrong parameter settings; external signal
error; OP and +24V jumper loose; fault of
control panel
Encoder fault; wrong wiring or poor contact
of encoder; fault of PG card; fault of driver
board
Incorrect
parameter
inappropriate acceleration/deceleration time;
fluctuation of load;
Check input power; check
busbar voltage; pull out and
insert flat cable again; seek
convertor
is
for service from manufacturer
Pull out and insert flat cable
again; seek for service from
manufacturer
Measure insulation between motor
and output line with tramegger; seek
for service from manufacturer
Change fan; eliminate external short-
circuit fault
Reduce carrier frequency (P0-15);
change fan, clear air channel; seek
for service from manufacturer
Reconfirm wiring between frequency
convertor and motor; change motor or
eliminate mechanical fault; check and
reset motor parameters
Check and reset parameters of P4
group; reconnect external signal
line; reconfirm OP and +24V
jumpers; seek for service from
manufacturer
Change code disk and
reconfirm wiring; change PG
card; seek for service
Reset motor parameters or tune
setting
of
motor;
motor; set acceleration and
deceleration time; seek for service
from manufacturer
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Solutions
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