Chapter 7 Faults and Solutions
137
failure
User-
defined
fault 1
Err27
Check the signal of the
terminal input custom fault 1
Reset operation
User-
defined
fault 2
Err28
Check the signal of the
terminal input custom fault 2
Reset operation
Accumulate
d power-on
time to
failure
Err29
Cumulative power-on time
reaches the set value
Parameter initialization clear
record information
Download
fault
Err30
The inverter running current is
less than P9-64
Check if the load is out of range
or whether the P9-64 and P9-
65 settings are in accordance
with the actual working
conditions.
Runtime
PID
feedback
loss failure
Err31
PID feedback is less than PA-
26 set value
Check the PID feedback signal
or set PA-26 to a suitable value
Wave-by-
wave
current
limiting fault
Err40
1. Is the load too large or the
motor is blocked?
2, the inverter selection is too
small
1. Reduce the load and check
the motor and mechanical
conditions. 2. Select the
inverter with higher power level.
Switching
motor
failure
during
operation
Err41
Change the current motor
selection through the terminal
while the inverter is running
After the inverter stops, the
motor is switched.
Speed
deviation is
too large
Err42
1. Encoder parameter setting
is incorrect
2, no parameter identification
3. The parameters P9-69 and
1, set the encoder parameters
correctly
2. Perform motor parameter
identification