AC Module System Installation Manual
Rev. 1.0
95
Copyright © 2017 LG Electronics.
All Rights Reserved.
Cause
Device
Event Code
Impact
Event Name
(App / Web)
Event Class
Description
Remarks
MI
MI_VDC_OVR
Error
Inverter Failure
Error
Vdc Status
ERROR. Iac Status - 1
: Vdc Over (Error #4 -
DC Link Voltage High)
AC Module has been failure mode
.
MI_VFR_OVR
Notice
AC Frequency
High
Vfreq Status
NOTICE. Vfreq Status
10 : Vfreq Over
AC Frequency is the frequency at
which voltage varies on the utility
grid. AC Frequency coming from t
he utility is too high than allowed.
And this events are usually transi
ent and recovered by the utility.
No action is required unless the c
ondition persists.
MI_VFR_UND
Notice
AC Frequency
Low
Vfreq Status
NOTICE. Vfreq Status
11 : Vfreq Under
AC Frequency is the frequency at
which voltage varies on the utility
grid. AC Frequency coming from t
he utility is too low than allowed.
And this events are usually transi
ent and recovered by the utility.
No action is required unless the c
ondition persists.
MI_VPV_OVR
Error
DC Voltage High
Vpv Status
ERROR. Vpv Status -
10 : Vpv Over (Error #
1 - DC Voltage Too Hi
gh)
DC Input voltage from the AC Mo
dule is too high than allowed.
MI_VPV_UND
Notice
DC Voltage Low
Vpv Status
NOTICE. Vpv Status -
11 : Vpv Under (Error
#7 - DC Voltage Too L
ow)
DC Input voltage from the AC Mo
dule is too low. This is usually nor
mal condition during hours of low
light and at dawn and dusk. If thi
s condition does clear during hou
rs of full daylight, the AC Module
may be heavily shaded or covered
by snow.