If The "Light Alarm" Indication Appears - Fuji Electric FRENIC-HVAC User Manual

9.3.2

If the "Light Alarm" Indication Appears

When an error is detected and the error is determined to be a light
alarm, operation can be continued without tripping the inverter
while outputting a warning (display and general purpose output
terminal).
If a light alarm occurs, the WARN. LED starts flashing, and the
light alarm factor is displayed on the screen.
If a light alarm occurs, a light alarm "L-ALM" is output to the multi-purpose output terminal (It is
necessary to assign a light alarm "L-ALM" (data = 98) to function codes E20 through E24, and E27.)
Light alarm operations can be selected with function codes H181 through H182. The available "light
alarm" codes are check-marked in the "Light alarm" object column in Table 9.1.
To display the "light alarm" factor and escape from the light alarm state, follow the instructions below.
 Checking the light alarm content.
1) Press the key to enter Programming mode.
2) Select program mode (PRG) > 4(Alarm Info) > 2(Warning History) to check the light alarm
content. Light alarm codes are displayed in order of new alarms first. Refer to Table 9.1 for details
on the codes.
 Releasing the light alarm
1) Eliminate the cause of the light alarm in accordance with the troubleshooting procedure
applicable to the light alarm content (code) checked in the maintenance information. Refer to the
"Ref. page" in Table 9.1 for information on troubleshooting and explanations.
2) After confirming the light alarm, clear the alarm display. To return to the normal state, either
press the
alarm, enter multi-purpose input terminal alarm reset command RST, or enter the alarm reset
command by communication.
If the light alarm factor is successfully eliminated, the WARN. LED turns OFF, the light alarm
code displayed at the screen changes to the normal display, and multi-purpose output L-ALM
also turns off.
If unable to successfully eliminate the light alarm factor (e.g., when a DC fan lock is detected),
the WARN. LED turns ON, and the light alarm code displayed on the screen and multi-purpose
output L-ALM remain ON (factor elimination reserved). When the light alarm factor is later
eliminated, the WARN. LED turns OFF automatically, the light alarm code displayed on the
screen changes to the normal display, and multi-purpose output L-ALM also turns OFF.
key in the operating mode status similar to the same procedure used to release the
Fig. 9.1 Light alarm display example
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