Generac Power Systems MGG155 Operating Manual page 50

Troubleshooting
NT
Alarm/History
Record
RTCbatteryFlat
Al/Hist. msg 1-165
Batt volt
EarthFaultCurr
Gen V unbal
Gen I unbal
BusL I unbal
Mains V unbal
Mains I unbal
Bus V unbal
BusL V unbal
BusR V unbal
Dongle incomp
Emergency stop
46
Table 8 - Digital Controller List of Alarms
This warning message "RTCbatteryFlat" appears in Alarmlist when battery is close to be
completely flat.
If power supply cut comes when the RTC battery is flat, the statistic values, history and
setpoints settings are lost. Send a controller to your distributor for battery exchange if the
RTCbatteryFlat message is displayed.
Al/Hist. msg 1-16 activity indication (Al/Hist. msg means Alarm/History message). Al/
Hist. msg can be used as a customized message for additional protection configured to
any controller internal value. See GenConfig manual - Protections.
Indication of battery voltage protection activity. This protection is based on Analog pro-
tect: Batt >V, Batt <V, and Batt volt del setpoints. Check if engine alternator or indepen-
dent battery charger works properly.
Indication of Earth fault current protection activity. This protection is based on Gener
protect: EarthFaultCurr and EthFltCurr del setpoints. Setpoint EarthFltCurrCT from
Basic settings group of setpoints is related to this protection too.
Generator voltage unbalance alarm is based on Gener protect: Gen V unbal and Gen V
unb del setpoints. The voltage unbalance is calculated as a maximum difference
between phase voltages.
Generator voltage unbalance alarm is based on Gener protect: Gen V unbal and Gen V
unb del setpoints. The voltage unbalance is calculated as a maximum difference
between phase voltages.
Left bus current asymmetry (unbalance) alarm is based on Gener protect: BusL I unbal
and BusL I unb del setpoints. The current unbalance is calculated as a maximum differ-
ence between phase currents.
Mains voltage unbalance alarm is based on Mains protect: Mains V unbal and MainsV
unb del setpoints. The voltage unbalance is calculated as a maximum difference
between phase voltages.
Mains current asymmetry (unbalance) alarm is based on Mains protect: Mains I unbal
and Mains Iunb del setpoints. The current unbalance is calculated as a maximum differ-
ence between phase currents.
Bus voltage unbalance alarm is based on Gener protect (Bus protect): Bus V unbal
and Bus V unb del setpoints. The voltage unbalance is calculated as a maximum differ-
ence between phase voltages.
Left bus voltage unbalance alarm is based on BusL protect: BusL V unbal and BusL V
unb del setpoints. The voltage unbalance is calculated as a maximum difference
between phase voltages.
Right bus voltage unbalance alarm is based on BusR protect: BusR V unbal and BusR
V unb del setpoints. The voltage unbalance is calculated as a maximum difference
between phase voltages.
Incompatible (usually missing) dongle indication.
IGS-NT-LSM+PMS dongle (green one) is required if load sharing and power manage-
ment functions are used in MINT, COX or COMBI application.
Check a Reference Guide for information whether a dongle is required for requested
functionality or not.
Emergency stop activity indication. Check binary input with Emergency stop function.
MGG155/210 Operating Manual
Description
35319 C