Inovance MD300 - Fault Alarm and Countermeasures

Fault Diagnosis and Solution MD320/MD320N User Manual
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Chapter 8 Fault Diagnosis and Solution
8.1 Fault Alarm and Countermeasures
MD320 inverter has 24 pieces of warning information and protection function. In case of
abnormal fault, the protection function will be invoked, the inverter will stop output, and the
faulty relay contact of the inverter will start, and the fault code will be displayed on the display
panel of the inverter. Before consulting the service department, the user can perform self-
check according to the prompts of this chapter, analyze the fault cause and nd out t solution. If
the fault is caused by the reasons as described in the dotted frame, please consult the agents
of inverter or our company directly.
Among the 21 pieces of warning information, Err22 is hardware over current or over voltage
signal. In most cases, the hardware over voltage fault will cause Err22 alarm.
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Inve rte r Unit Prote ction
Che ck if the inve rte r output
loop is short circuited
Pe rform
Troubleshooting
If the cable connecting the motor
with the inve rte r is too long
Install a Reactor or Output Filter
If the module is ove r he a t
Che ck if the a ir duct is blocke d a nd
if the fan is in normal status, and
re s olve the existing problems .
Che ck if the ca ble conne ctions
ins ide the inve rte r a re loos e n
Insert all the connecting
cables properly
If it works norma lly after re placing
the main control board
The main control
board is faulty
If it works norma lly after
re placing the drive boa rd
The drive boa rd
is fa u lt y
If it works norma lly after
re placing the inve rte r
The inve rte r is
damaged
Ask for te chnica l
support
No
No
No
No
Fig.8-1 Inverter unit protection (ERR01)