ReferenceModification no.
- 0 -
Page
121
Date
1997 02 01
Main
914 F
01477
12.4.15)Flashing of the red boost lamp of Turbo Control Unit (TCU)
Flashing of the red boost lamp signals exceeding of the 5 minute time limit for
take-off performance. Depending on the time the 5 minute limit is exceeded,
increased wear by thermal overstressing of cylinder, valves and spark plugs
has to be considered.
The following checks are necessary:
➪ check wiring. See chapter 12.3.16)
If no physical damage can be detected, check the TCU. Consult chapter
13.6).
Exceeding time limit up to 1 minute:
No direct checks are necessary as long as no further operating limits are
exceeded.
â– ATTENTION: If further operating limits were exceeded or fell short of
conduct the additional relevant checks.
Exceeding time limit between 1 to 3 minutes:
➪ Inspection of engine. See chapter 12.3.2).
➪ Check of the spark plugs. See chapter 12.3.18).
➪ Check compression. See chapter 12.3.20).
â– ATTENTION: If further operating limits were exceeded or fell short of
conduct the additional relevant checks.
Exceeding time limit by more than 3 minutes:
Examination of the pistons, cylinders, valves and cylinder heads is neces-
sary.
â– ATTENTION: If further operating limits were exceeded or fell short of
conduct the additional relevant checks.
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