Chapter 6 Troubleshooting                                                                                            IS620P User Manual                                                 
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14. Er.990: Power input phase loss
Cause: 
 
•
The three-phase servo drive of 1 kW below is allowed to run under single-phase power but 
the fault and alarm of power input phase loss (H0A-00) is enabled.
Cause Conrming Method Corrective Action
When H0A-00 = 1 (allow 
faults and warnings at 
power input phase loss 
protection), the three-
phase servo drive (0.75 
kW) (H01-02 = 5) can 
run under single-phase 
power. In this case, the 
drive reports the alarm.
 
•
Check whether it is the three-
phase servo drive that is 
allowed to run under single-
phase power.
 
•
If the alarm is still reported when 
the three-phase servo drive is 
connected to three-phase power, 
troubleshoot the alarm as Er.420 
(power cable phase loss). 
 
•
If the alarm is still reported when 
the three-phase servo drive is 
connected to the single-phase 
power, set H0A-00 to 0.
15. Er.994: CAN address conict
Cause Conrming Method Corrective Action
CANlink address conict 
occurs.
 
•
Check whether H0C-00 (servo 
shaft address) is allocated 
repeatedly.
Allocate the servo shaft address 
of the salves and ensure that the 
allocation of H0C-00 is not repeated.
6.2.4 Internal Faults
When the following faults occur, contact Inovance for technical support.
 
•
Er.104: programmable logic interrupted
 
•
Er.111: H00/H01 groups parameters abnormal
 
•
Er.207: Shaft D/Q current overow
 
•
Er.208: FPGA system sampling operation timeout
 
•
Er.220: Phase sequence incorrect
 
•
Er.602: Angle auto-tuning failure
 
•
Er.A40: Motor auto-tuning failure