Fuji Electric FRENIC-HVAC User Manual page 651

[ 26 ] ECL Customizable logic error
Problem An ECL occurred due to a customizable logic setting error.
Possible Causes
(1) The customizable logic
operation selection setting was
changed during operation.
[ 27 ] ECF Enable circuit error
Problem A circuit error was detected when diagnosing the enable circuit status.
Possible Causes
(1) Interface board contact defect
(2) Enable circuit logic error
(3) An enable circuit (safety stop
circuit) fault (single fault) was
detected.
[ 28 ] PVn PID feedback wire break
Problem: The PID feedback wire is broken.
PV1 PID control 1 feedback error
PV2 PID control 2 feedback error
Possible Causes
(1) The PID feedback signal wire is
broken.
(2) PID feedback related circuit
affected by strong electrical noise.
(3) The function code setting is not
appropriate.
9.3 If an Alarm Code Appears on the Monitor
What to Check and Suggested Measures
Check whether the customizable logic operation selection (function
code U00) was changed during operation.
 Do avoid potential hazards, do not change the customizable logic
operation selection during operation.
What to Check and Suggested Measures
Check whether the interface board is securely attached to the unit.
 The alarm will be cleared by turning ON the power again.
Check whether outputs from safety switches and so on are input to both
terminals EN1 and EN2 with the same logic (High/High or Low/Low).
 The alarm will be cleared by turning ON the power again.
If unable to clear the error with the above procedures, the inverter
condition is abnormal.
 Contact Fuji Electric.
What to Check and Suggested Measures
Check whether the PID feedback signal wires are connected
correctly.
 Check whether the PID feedback signal wires are connected
correctly. Or, tighten up the related terminal screws.
 Check whether any contact part bites the wire sheath.
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 wires as far as
possible.
The PID control feedback error upper limit (J129, J229) settings are
too high.
 Review the set feedback value.
The PID control feedback error lower limit (J130, J230) settings are
too low.
 Review the set feedback value.
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