Volvo Penta D2-55, Workshop Manual

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89
Group 30 Electrical system
Electrical components
Relay box with fuses
The engine is equipped with a fuse block with four fus-
es (15A). One fuse safeguards the electrical system
and blows if overloaded, the others are spares.
If a fuse blows, the electrical system can be recon-
nected by moving the cable to the next fuse/connec-
tor. Always first investigate the reason for the over-
load.
Monitors
Lube oil pressure monitor - alarm
Contact type: Normally open. The contacts close if
the lube oil pressure in the engine drops below
0.3 ± 0.15 bar.
Check of the closing point is done with falling pres-
sure.
Coolant temperature monitor - alarm
Contact type: Normally open. The contacts close if
the coolant temperature rises above 95
o
C ± 3
o
C.
Check of the closing point is done with rising temper-
ature.