Fuji Electric Frenic-Mini - Page 147

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Possible Causes What to Check and Suggested Measures
(2) A high intensity noise was
given to the inverter while
data (especially initializing
data) was being written.
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.
 Improve noise control. Alternatively, return the initialized
function code data to their previous settings, then restart the
operation.
(3) The control circuit failed.
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.
 This problem was caused by a problem of the printed circuit
board (PCB) (on which the CPU is mounted). Contact you
r
Fuji Electric representative.
[ 13 ]
er2 Remote keypad communications error
Problem A communications error occurred between the remote keypad and the inverter.
Possible Causes What to Check and Suggested Measures
(1) Break in the
communications cable or
poor contact.
Check continuity of the cable, contacts and connections.
 Replace the cable.
(2) A high intensity noise was
given to the inverter.
Check if appropriate noise control measures have been
implemented (e.g., correct grounding and routing of control
and main circuit wires).
 Improve noise control. For details, refer to "Appendix A" o
f
the FRENIC-Mini User’s Manual (MEH446).
(3) The remote keypad
malfunctioned.
Check that alarm er2 does not occur if you connect anothe
r
remote keypad to the inverter.
 Replace the remote keypad.
(4) The RS-485
communications card
malfunctioned.
Check that alarm
er2 occurs even if you connect anothe
r
remote keypad to the inverter.
 Replace the card.
[ 14 ]
er3 CPU error
Problem A CPU error (e.g. erratic CPU operation) occurred.
Possible Causes What to Check and Suggested Measures
(1) A high intensity noise was
given to the inverter.
Check if appropriate noise control measures have been
implemented (e.g. correct grounding and routing of control and
main circuit wires).
 Improve noise control.