MQ Power WHISPERWATT DCA125SSIU4F Operation Manual page 59

If the diesel exhaust fluid (DEF) symbol (Figure 86) is
displayed during ECU controller operation, it indicates the
following:
„ DEF tank level is below 10%. Reference Table 17, DEF
Level System Action.
„ DEF quality is poor. Check DEF tank level and check
active diagnostics trouble codes (DTC).
ECU
Series 800 Controller
DEF STAT
Alarm Screen
Option
Acknowledge Change
Figure 86. ECU DEF State Pre-Alarm
NOTICE
The unit will enter emergency shutdown when the
DEF level has reached 0% and emergency protective
measures are necessary. When this condition exists,
the unit can only be restarted after ESCAPE MODE is
activated and the unit will run for 30 minutes. Reference
the "Escape Mode" section in this manual.
DEF Level
Controller Message
SCR System Pop-Up
DEF Symbol
Pre-Alarm Lamp
Shutdown Lamp
DCA125SSIU4F 60 HZ GENERATOR • OPERATION MANUAL — REV. #6 (05/12/22) — PAGE 59
Engine Started
Shutdown
Pre-Alarm
Program
Exit
Table 17. DEF Level System Action
Over 10% Below 10%
DEF TANK < 10%
—
REFILL DEF
— REFILL DEF
—
ON
—
ON
— —
DIESEL EXHAUST FLUID (DEF)
The amount of fluid in the DEF tank will be shown on the
ECU Controller main screen during operation. The symbol
shown in Figure 87 will be shown on the ECU monitor
indicating the level of fluid in the DEF tank.
Figure 87. DEF Tank Level Gauge
Below 5%
DEF TANK < 5%
REFILL DEF
REFILL DEF
Slow Flashing
ON
—
MAINTENANCE
After 30 Minutes
DEF TANK < 0% SD
REFILL DEF
REFILL DEF
Fast Flashing
ON
ON
(Engine Shutdown)