GE Industrial Solutions AF-300C AC Drive - Manual (Page 100)

AF-300C GEK-85718
EXTERNAL FAILURE (OH2)
Is the connection
YES
between THR and CM
correct and intact?
NO
Is the alarm function of
the external equipment
working properly?
Is ambient temperature
for the external
equipment within the
specified value?
Correct the ambient
condition to make it
within the specified
value.
YES Are external thermal
sensors working
YES
thermal sensors.
Reduce the load of the
external equipment or
decrease the duty
cycle, or use
larger HP
The inverter will trip on Remove RUN
OH2 if powered-up with mand and press
a RUN command RESET on the keypad
present. This is a to clear the trip.
feature.
YES
RUN command from
remote conflicts with
STOP command from
Use shielded and
twisted wire for
control inputs. (Do not
connect terminals 11 or
CM to earth ground.)
was present (FWD or
Was STOP pressed on
the keypad when the
inverter was running
the
NO
Potential noise
at THR or CM
terminals .
YES
Possible invetter
failure Contact
fnverter Supplier
NO
YES
I
Check that proper
noise prevention
measures have
been taken.
Figure 8-8. “EXTERNAL FAILURE” TROUBLESHOOTING CHART
8-8