IS620P User Manual                                                                                            Chapter 6 Troubleshooting
- 125 -
6.2.2 Troubleshooting
1.  Er.101: Groups H02 and above parameters abnormal
Cause: 
 
•
Total number of function codes changes, which generally occurs after software update.
 
•
The actual values of groups H02 and above parameters exceed the limit, which generally 
occurs after software update.
Cause Conrming Method Corrective Action
1. The control 
power voltage drops 
instantaneously. 
 
•
Check whether it is in the 
process of cutting off the 
control power (L1C, L2C) or 
whether instantaneous power 
failure occurs.
Restore the default setting (H02-31 = 
1), and write the parameters again.
 
•
Measure whether the control 
power voltage on the non-drive 
side is within the following 
specications: 
220 V drive: 
Effective value: 220 to 240 V
Allowed error: -10% to 10% 
(198 to 264 V)
380 V drive: 
Effective value: 380 to 440 V
Allowed error: -10% to 10% 
(342 to 484 V)
Increase the power capacity or replace 
with large-capacitance power supply, 
restore the default setting (H02-31 = 
1), and write the parameters again.
2. Instantaneous power 
failure occurs during 
parameter storage
 
•
Check whether instantaneous 
power failure occurs during 
parameter storage.
Re-power on the system, Restore the 
default setting (H02-31 = 1), and write 
the parameter again.
3. The times of 
parameter writing 
within a certain period 
exceeds the limit.
 
•
Check whether parameter 
update is performed frequently 
from the host controller.
Change the parameter writing method 
and write parameters again.
If the servo drive is faulty, replace it
4. The software is 
upgraded.
 
•
Check whether the software is 
upgraded.
Set the servo drive model and motor 
model again, and restore the default 
setting (H02-31 = 1).
5.The servo drive is 
faulty.
 
•
If the servo drive is powered off 
and powered on gain several 
times and the default setting is 
restored, but the fault remains, 
it indicates that the servo drive 
is faulty.
Replace the servo drive.