3.3.2 Monitoring light alarms
The FRENIC-Ace identifies abnormal states in two categories--Heavy alarm and Light alarm. If the former occurs,
the inverter immediately trips; if the latter occurs, the inverter shows the
l-al
on the LED monitor and blinks the
KEYPAD CONTROL LED but it continues to run without tripping.
Which abnormal states are categorized as a light alarm (“Light alarm” object) should be defined with function codes
H81 and H82 beforehand.
Assigning the L-ALM signal to any one of the digital output terminals with any of function codes E20, E21 and E27
(= 98) enables the inverter to output the L -ALM signal on that terminal upon occurrence of a light alarm.
For details of the light alarm objects, refer to Chapter 6 “TROUBLESHOOTING.”
■ How to check a light alarm factor
If a light alarm occurs,
l-al
appears on the LED monitor. To check the current light alarm factor, enter
Programming mode by pressing the key and select
5_36
on Menu #5 “Maintenance Information.”
It is also possible to check the factors of the last three light alarms
5_37
(last) to
5_39
(3rd last). To check the light
alarm factors in Menu #5 “Reading maintenance information,” it is necessary to set the data of function code E52 to
“2” (Full-menu mode) beforehand.
For details of the menu transition of the maintenance information, refer to “3.4.5 Reading maintenance information
“Maintenance Information:
%che
”.”
■ How to reset a light alarm
After checking the current light alarm factor, to switch the LED monitor from the
l-al
indication state back to the
running status display (e.g., output frequency), press the key in Running mode.
If the light alarm factor has been removed, the KEYPAD CONTROL LED stops blinking and the L-ALM signal turns
OFF. If not (e.g. DC fan lock), the KEYPAD CONTROL LED continues blinking and the L-ALM signal remains ON.
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