Generac Power Systems MGG155 Operating Manual page 51

NT
Alarm/History
Record
CAN2 bus empty
ChrgAlternFail
Sd Stop fail
Overspeed
Underspeed
Pickup fail
Sd BatteryFlat
WrnServiceTime
Not lubricated
Start fail
35319 C
Table 8 - Digital Controller List of Alarms
This alarm is active if controller doesn't "see" any other controllers on the CAN2 bus.
Alarm activation can be enabled/disabled using setpoint Comm settings: CAN2empt-
Detect. This setpoint should be set to DISABLED for single genset applications.
Check Reg16/Reg32 strings to see which controllers are in the same group18.
Charger fail detection. This alarm means that voltage on the D+ terminal is lower than
80% of controller power supply voltage and it means that battery is no longer charged.
Check function of engine alternator or independent battery charger.
Engine stop fail indication. Stop fail means that engine does not reach "still engine" state
within Engine params: Stop time.
"Still engine" conditions:
- Engine speed (RPM) = 0 and
- AI: Oil press < Starting POil and
- D+ terminal is not active and
- BI: RunIndication 1 and 2 and 3 are not active and
- Generator voltage < 15V (in all phases) and
- Generator frequency = 0 Hz
- if all these conditions are fulfilled, additional two second delay is used to confirm "still
engine" state.
Genset over speed alarm is based on Engine protect: Overspeed setpoint setting.
Genset under speed alarm indication. Under speed limit is given by Engine params:
Starting RPM, if the engine has already started (see Starting procedure description in
Reference Guide).
Pickup fail indication. Pickup fail means loss of RPM signal in running state ("engine run-
ning" state is active).
"Engine running" conditions:
- Engine speed > Engine params: Starting RPM or
- AI: Oil press > Starting POil or
- D+ terminal active (this condition is used only if Engine
params: D+ function = ENABLED) or
- BI: RunIndication 1 or 2 or 3 is active or
- Generator voltage > 15V (in any phase)
See Speed pick-up input section in the Technical data chapter in IGS-NT-x.y.-Installation
Guide manual for information about requested pick-up signal parameters.
Alarm is activated if controller "wakes up" after a start attempt which caused battery volt-
age drop (voltage drop below 6V) and consequently controller switch-off. ComAp I-LBA
module may help to solve this problem, for information about this module, see IGS-NT-
x.y.-Installation Guide manual.
This alarm is activated when at least one of controller count down service timers Engine
protect: Service time X has reached zero. It is necessary to set again a non-zero value
to a corresponding setpoint to reset this alarm.
This Alarm list message is active until the first lubrication cycle has been finished.
See Engine states chapter in IGS-NT-x.y-Reference Guide.
This alarm is issued if genset start-up fails. It means that several crank attempts has
been done (number of attempts is given by Engine params: Crank attempts) and engine
did not start.
For more information, see Engine starting procedures chapter in IGS-NT-x.y-Reference
Guide.
MGG155/210 Operating Manual
Description
Troubleshooting
47