CTEK MULTI US 3300 User Manual page 7

Caution: If the MULTI US 3300 does not switch to maintenance charge mode after three
days, manually switch it to pulse maintenance mode. If the set has been switched to
maintenance charge, then everything is in order. Note: A battery that hasn't changed to
maintenance charge after three days is most likely worn out and needs to be replaced. All
other batteries can be maintained for a very long time.
CHARGING
Connecting the MULTI US 3300:
1. When the battery cable is being connected or disconnected, the plug of the
MULTI US 3300 must be disconnected from the power socket.
2. Establish which terminal is ground (connected to the chassis). Normally the negative
terminal is grounded.
3. Charging a battery grounded to the negative terminal: Negative-grounded vehicle
Charger connection.
a) Connect positive charger clip (red) to positive battery terminal.
b) Connect negative charger clip (black) to a good metal engine ground away from the
battery. Do not connect clip to fuel lines or sheet-metal body parts.
c) Connect the AC cord to the socket. The red alarm indication light
battery which is connected to reverse polarity.
4. Charging a battery grounded to the positive terminal: Positive grounded vehicle
Charger connection.
a) Connect negative charger clip (black) to negative battery terminal.
b) Connect positive charger clip (red) to a good metal engine ground away from the
battery. Do not connect clip to fuel lines or sheet-metal body parts.
c) Connect the AC cord to the socket. The red alarm indication light
battery which is connected to reverse polarity.
Connecting the MULTI US 3300 to an out of vehicle battery:
1. Check polarity of battery terminals. POSITIVE (POS, P, +) battery post usually has
larger diameter than NEGATIVE (NEG, N, -) post.
2. Connect POSITIVE (RED) charger clip to POSITIVE (POS, P, +) battery post.
3. Connect NEGATIVE (Black) charger clip to NEGATIVE (NEG, N, -) battery post. The
red alarm indication
polarity.
4. Connect charger's AC cord to socket.
5.
6. When disconnecting charger, disconnect in reverse sequence from connecting
procedure. See operating instructions for charge information.
light will indicate a battery, which is connected to reverse
will indicate a
will indicate a
US • 7