Creation: 01.31 - 2014
1-2-6
GPU - 406
c. Press and release the GREEN button to turn off the 28VDC power
(only if model is equipped with a DC cable)
(2) Disconnect the power cable from the aircraft.
(3) Stow the power cable on the generator in the proper location.
F. Shutting Down the Engine
(1) Press and release the BLUE button. If any outputs are being used, they will automatically shut off.
The engine will cool down for 60 seconds before shutting down.
The operator can cancel the shutdown at any time of the cool-down by pressing and releasing the
blue button.
When the engine is shut-down, battery power to the engine computer must be maintained for a
minimum of 120 seconds. This allows existing engine faults to be registered by the ECM. On a
Tier 4 Final Engine, this allows the DEF injection system to be purged. Do not turn off the main
battery disconnect switch during this time.
Failure to maintain battery power to the ECM will result in diagnostic trouble codes upon the next
start-up.
Tier 4 Final Engine Operation Notes
In order to meet cleaner emissions standards, TLD ground power units can be equipped with a diesel engine
that is compliant with U.S. Tier 4 Final/E.U Stage IV regulations. The effect of these regulations is that off-road
diesel engines must emit less harmful emissions than ever before. Engine manufacturers have employed new
technology to accomplish the goals set forth by governing bodies.
The Tier 4 Final engine equipped on a TLD ground power unit has an exhaust system fitted with a diesel
oxidation catalyst (DOC) which reduces emitted hydrocarbons and carbon monoxide. The exhaust system also
contains a selective catalytic reducer (SCR) which, when used with DEF, reduces emitted NO
X
.
CAUTION:
FAILURE TO ALLOW THE ENGINE TO IDLE AFTER OPERATING
UNDER LOAD MAY LEAD TO TURBOCHARGER BEARING
DAMAGE.
DO NOT USE THE EMERGENCY STOP SWITCH TO SHUT DOWN
THE UNIT DURING NORMAL OPERATION.
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