Active Corrosion Protection System - Volvo Penta 3.0GLP-C Owner's Manual

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VPA 7743722 English 10-2004

Active Corrosion Protection System

Your boat may be equipped with a Volvo Penta active
corrosion protection system (APC). This system oper-
ates with very little current drain from the boat's elec-
trical system. It keeps the voltage potential in the area
around the drive unit in a range that is not corrosive to
aluminum. (This is accomplished by changing the
charge of water molecules so that they do not remove
electrons from the drive unit's metal parts to cause
corrosion.) If you do not have an active corrosion pro-
tection system already installed, you may purchase
one from your authorized Volvo Penta dealer.
The protection system's control box has both red and
green LED indicator lights (A). The lights will indicate
the amount of protection that the unit is providing to
protect the sterndrive and transom shield. The ACP
system is designed to protect one sterndrive and tran-
som shield assembly. If copper based antifouling paint
is used or the drive is installed on a metal hull, the unit
may be inadequate to protect the drive and transom
shield.
1. The green LED (1) indicates the unit is ade-
quately protected.
2. If the green and red LEDs (2) are illuminated, the
drive is protected but the system is drawing maxi-
mum power (between 3 to 150 mA) to protect the
drive unit. Check the following conditions and
solutions.
Water too severely contaminated or polluted.
Install additional anode on the transom and
ground to drive unit.
Too much unpainted metal on the drive or
transom shield. Clean and paint exposed
metal on drive and transom shield. Please re-
fer to the section entitled Propeller Care on
page 98 for paint repair procedures.
Corroded, missing, or painted anodes. Serv-
ice or replace anode as required.
Stray current from shore power or surround-
ing boats. Disconnect shore power, wait 8
hours and recheck. If still present, temporarily
relocate boat to another area away from the
marina and check again.
Loose or corroded terminals on the electronic
unit or battery. Clean and tighten connectors.
Copper bottom paint used and is in contact
with the transom shield. Remove paint and
ensure there is a 25mm (1 in.) border be-
tween transom shield and bottom paint.
Maintenance
95