Generator Set Operation; Faults - Lennox RGEN12 Operation Manual

2.4.2 Sleep Mode
Controllers with application code version 1.13 or higher
are shipped with the sleep mode disabled and J1939
communication enabled. The controller will remain in
standby mode whenever the master switch is in AUTO
and the engine is not running.
Note: The battery charger must be connected to utility
power to prevent battery discharge.
Communication parameter Cn can be changed to
disable communication and enable the sleep mode if
remote communication is not required. See Installation
Manual XP-6514 for instructions to set parameter Cn.
Sleep Mode. If the controller communication is
disabled and the generator set master switch is in the
AUTO position, the
automatically after 48 hours of inactivity. The controller
display is dark and battery draw is minimized. A remote
start signal (from a transfer switch or a remote start/stop
switch connected to controller leads 3 and 4) reactivates
the controller. Moving the generator set master switch to
the RUN position also activates the controller.

2.5 Generator Set Operation

2.5.1 Starting Generator Set
Local Starting
Move the generator set master switch to the RUN
position to immediately start the generator set.
Auto (Automatic) Starting
Move the generator set master switch to the AUTO
position to allow startup by an automatic transfer switch
(ATS) or remote start/stop switch, if equipped. Close a
contact across engine start leads 3 and 4 to signal the
controller to start the generator set.
Crank Cycle
The controller attempts to start the generator set three
times (three crank cycles, 15 seconds crank and
15 seconds off). See Figure 2-2 for display information
during the crank cycle. If the generator set does not start
in three attempts, the system shuts down on an
overcrank fault. See Section 2.6.
2.5.2 Stopping Generator Set
Local Stopping
1. Run the generator set with no load for at least
2 minutes to ensure adequate engine cooldown.
14 Section 2 Operation
controller powers down
2. Move the generator set master switch to the OFF/
RESET position. The engine stops.
Automatic Stopping
With the generator set master switch in the AUTO
position, open the contact across engine start leads 3
and 4 to signal the generator set to stop.
An automatic transfer switch (ATS) connected to
controller leads 3 and 4 operates as follows:
1. The ATS disconnects the load from the generator
set.
2. If the ATS is equipped with an engine cooldown
time delay, the generator set continues to run for a
preset engine cooldown time.
Note: There is no engine cooldown time delay on
the controller.
3. The ATS opens the connection between controller
leads 3 and 4. The generator set shuts down. The
controller enters standby mode and displays
engine runtime hours.

2.6 Faults

2.6.1 Shutdowns
Under the fault shutdown conditions listed in Figure 2-4,
the generator set shuts down automatically and the
controller displays a fault code. The generator set
cannot be restarted until the fault condition is corrected
and the controller is reset. See Section 2.6.3 to reset the
controller after a fault shutdown.
The shutdown switches on the generator set will
automatically reset when the problem is corrected. For
example, the high engine temperature switch resets
automatically when the generator set cools. However,
the fault does not clear until the controller is reset.
2.6.2 Warnings
The controller displays a fault code but the generator set
does not shut down on a high battery voltage warning or
a low battery voltage warning. The controller resets
automatically after a battery voltage fault condition is
corrected.
XP-6515 4/09