Fuji Electric Frenic Mega Series User Manual page 619

Possible Causes
(3) Noises superimposed on the
PG wire.
[ 17 ] pg PG wire break
Problem The pulse generator (PG) wire has been broken somewhere in the circuit.
Possible Causes
(1) The wire between the pulse
generator (PG) and the
option card has been
broken.
(2) PG related circuit affected
by strong electrical noise.
[ 18 ] er1 Memory error
Problem Error occurred in writing the data to the memory in the inverter.
Possible Causes
(1) When writing data
(especially initializing or
copying data), the inverter
was shut down so that the
voltage to the control PCB
has dropped.
(2) Inverter affected by strong
electrical noise when
writing data (especially
initializing or copying data).
(3) The control PCB failed.
9.4 If an Alarm Code Appears on the LED Monitor
What to Check and Suggested Measures
Check whether appropriate noise control measures have been implemented
(e.g., correct grounding and routing of signal wires and main circuit wires).
Implement noise control measures. For details, refer to Appendix A.
What to Check and Suggested Measures
Check whether the pulse generator (PG) is correctly connected to the option
card or any wire is broken.
Check whether the PG is connected correctly. Or, tighten up the related
terminal screws.
Check whether any joint or connecting part bites the wire sheath.
Replace the wire.
Check if appropriate noise control measures have been implemented (e.g.,
correct grounding and routing of signal wires, communication cables, and main
circuit wires).
Implement noise control measures.
Separate the signal wires from the main power
What to Check and Suggested Measures
Initialize the function code data with H03 (= 1). After initialization, check if
pressing the key releases the alarm.
Revert the initialized function code data to their previous settings, then
restart the operation.
Check if appropriate noise control measures have been implemented (e.g.,
correct grounding and routing of control and main circuit wires). Also, perform
the same check as described in (1) above.
Implement noise control measures. Revert the initialized function code data
to their previous settings, then restart the operation.
Initialize the function code data by setting H03 to "1," then reset the alarm by
pressing the key and check that the alarm goes on.
The control PCB (on which the CPU is mounted) is defective. Contact your
Fuji Electric representative.
9-21
wires as far as possible.