Mack V-MAC IV - Engine Management Features; Engine Derate and Shutdown

22V-MACCo-PilotOperator'sManual
EngineDerate
Forsomeconditions(seetablebelow),anenginederatecanoccurrstandifa
conditionworsens,thenanengineshutdowncanoccur.
CONDITION
ENGINEDERATE
ENGINE
SHUTDOWN
INDI-
CATOR
LIGHTS
IntakeManifold
AirTemperature
Deratestartsat120°C(248°F).
Fullderate(100%)occurswhen
temperatureisat140°C(284°F).
Noengine
shutdown.
Nowarning
indicators.
Engine
Turbocharger
CompressorOutlet
Temperature
Deratestartsat245°C(473°F).
Torqueisderateddownto100%
at250°C(482°F).
Noengine
shutdown.
Nowarning
indicators.
Iftemperatureexceeds220°C
(428°F)formorethan20seconds
witha30secondperiod,derate
starts.
Engine
ExhaustGas
Recirculation
(EGR)
Temperature
Iftemperaturereaches240°C
(464°F),a100%derateoccurs.
Noengine
shutdown.
Nowarning
indicators.
Crankcase
Pressure(CCP)
Ifachangeinpressure(difference
betweentheCCPandbarometric
pressure(BARO))risesabout5
kPa(0.725psi)withanoffset&0.5
kPa/s(0.07psi/s)andstaysover5
kPa(0.725psi)formorethan80%
ofthetimeduring1second,the
enginewillfullyderate(100%),be
forcedtoidle,andshutdown.
Engineshutdown.Redengine
shutdown
indicator.
Deratestartsat106.75°C
(224.15°F)andrampsdown
to12%derate.Torqueiskept
constantuntilthetemperature
reaches107.25°C(225.05°F).
Amber
malfunction
indicatorlights
at107.2°C
(224.96°F).
Deratestartsagainat107.4°C
(225.32°F)andrampsdownto
32%derate.
Redengine
shutdown
indicatorlights
at108°C
(226.4°F).
HighEngine
Coolant
Temperature
(ECT)
Torqueisderateddownto100%at
108.4°C(227.12°F).
Engine
shutdownif
temperature
risesto109°C
(228.2°F).
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