Fuji Electric FRENIC-Ace series - 6 ] Ground Fault; 7 ] Memory Error; Ecf en Circuit Failure; Ecl Customizable Logic Failure

6.3 If an Alarm Code Appears on the LED Monitor
6-7
TROUBLESHOOTING
Chap 6
[ 4 ]
ecf
EN circuit failure
Phenomena Enable circuit state was diagnosed and a circuit failure was detected.
Possible Causes Check and Measures
(1) Contact defect on interface-PCB
[Subcode: 10]
Confirm that the interface-PCB is firmly mounted on the body.
 Alarm is released by turning on again.
(2) Enable circuit logic failure
[Subcode: 3000]
Confirm that outputs from safety switch etc. are inputted by the same
logic (High/High or Low/Low) with EN1 terminal/EN2 terminal.
 Alarm is released by turning on again.
(3) A failure (single failure) of
enable circuit (safety stop
circuit) was detected.
If the circuit failure is not removable by the procedures above, the
inverter is out of order.
 Contact your Fuji Electric representative.
[ 5 ]
ecl
Customizable logic failure
Phenomena A setting failure of customizable logic was detected.
Possible Causes Check and Measures
(1) Setting of the selection of
customizable logic operation
was changed during operation.
Check whether the selection (Function code U00) of customizable logic
operation is changed during operation.
 Do not change the selection of customizable logic operation during
operation to prevent a danger.
[ 6 ]
ef
Ground fault
Phenomena A ground fault current flew from the output terminal of the inverter.
Possible Causes Check and Measures
(1) Inverter output terminal(s)
grounded (ground fault).
Disconnect the wiring from the output terminals (U, V, and W) and
perform a Megger test.
 Remove the grounded parts (including replacement of the wires,
relay terminals and motor).
[ 7 ]
er1
Memory error
Phenomena Error occurred in writing the data to the memory in the inverter.
Possible Causes Check and Measures
(1) When writing data (especially
initializing or copying data), the
inverter was shut down so that
the voltage to the control PCB
has dropped.
Initialize data by data initialization (H03), and check whether an alarm
can be released by key after finishing the initialization.
 Revert the initialized function code data to their previous settings,
then restart the operation.
(2) The inverter was affected by
strong electrical noise when
writing data (especially
initializing).
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.
(3) The control PCB failed. Initialize data by data initialization (H03), and check whether an alarm
continues even when the release of the alarm is attempted by key
after finishing the initialization.
 The control PCB (on which the CPU is mounted) is defective.
Contact your Fuji Electric representative.