Armstrong World Industries A50CU - Manual (Page 17)

AR-EXP-CUMMINS-07-00 OWNERS MANUAL
Page 17
7. PRE-OPERATION CHECK
BREAK-IN
During the engine break-in period, observe the following by
all means:
 Change engine oil and oil filter cartridge after the first
50 hours of operation
2. DAILY CHECK
To prevent trouble from occurring, it is important to know
the conditions of the engine well. Check it before starting.
CAUTION
To avoid personal injury:
• Be sure to install shields and safeguards attached to the
engine when operating.
• Stop the engine at a flat and wide space when checking.
• Keep dust or fuel away from the battery, wiring, muffler
and engine to prevent a fire.
Check and clear them before operating everyday. Pay atten-
tion to the heat of the exhaust pipe or exhaust gas so that it
can not ignite trash.
1) Oil or water leaks
2) Engine oil level and contamination
3) Amount of fuel
4) Amount of coolant
5) Dust in air cleaner dust cup
6) Damaged parts and loosened bolts and nuts
7) Emergency stop off.
8) Battery connections
9) Wiring in good condition
3. CONTROL PANEL
The DSE 5120 automatic mains failure module has been
primarily designed to start and stop the generator depend-
ing upon the mains supply status.
External autostart from a switch and user operated manual
start is also provided. Additionally, you have the facility to
view all the system operating parameters via the LCD dis-
play.
The DSE 5120 module monitors the engine, indicating the
operational status and fault conditions automatically
shutting down the engine and giving a true first up fault
condition of an engine failure by a flashing COMMON
ALARM LED. Exact failure mode information is indicated by
the LCD display on the front panel.
7.1. Automatic Mode of Operation
This mode is activated by pressing the pushbutton. An LED
indicator beside the button confirms this
action.
When the mains supply fails (or Remote Start signal (if con-
figured) is applied) the following sequence is initiated:
The mains available LED extinguishes (if the sequence was
started by mains failure) and the relevant mains over/under
voltage LED will illuminate.
The Remote Start Active indicator illuminates if the se-
quence is started by the remote start input. To allow for
short term mains supply brownouts or false start signals the
Start Delay timer is initiated. After this delay, if the pre-heat
output option is selected then the pre-heat timer is initiated,
and the corresponding auxiliary output will energize.
After the above delays the Fuel Solenoid is energized, then
one second later, the Starter Motor is engaged. The engine
is cranked for a pre-set time period. If the engine fails to fire
during this cranking attempt then the starter motor is disen-
gaged for the pre-set rest period. Should this sequence
continue beyond the set number of attempts (fixed at 3),
the start sequence will be terminated and Fail to Start fault
will be displayed accompanied by a flashing shutdown sym-
bol.
Fail to start Shut Down
When the engine fires, the starter motor is disengaged and
locked out at a pre-set frequency from the Alternator out-
put.
After the starter motor has disengaged, the Safety On timer
is activated, allowing Oil Pressure, High Engine Tempera-
ture, Under-speed, Charge Fail and any delayed Auxiliary
fault inputs to stabilize without triggering the fault.
Once the engine is running, the Warm Up timer, if selected
is initiated, allowing the engine to stabilize before accepting
the load.
If the mains supply returns (or the remote start signal is
removed if the start sequence was initiated by remote
start), before the warm up timer has expired, the mains
supply is kept on load and the return timer will begin.
At the end of the warming timer, If the mains supply is still
failed, or the remote start signal is still active, the load is
transferred to the generator - First the mains load switching
device is opened, then ¾ second later, the close generator
output is activated.
On return of the mains supply the mains in limit LED will
illuminate, and the under/overvolts LEDs will extinguish.
Additionally (or upon removal of the Remote Start signal if