Owner’s Manual 45
Wanco® Metro™ Message Sign
Replacing
To replace a battery, follow these steps:
1. Observe battery safety precautions (see “Safety” on page 41).
2. Disconnect power cable from computer box.
3. Disconnect the positive (+) cable from the battery.*
4. Disconnect the negative (–) cable from the battery.
5. Remove the hold-down brackets that keep the battery in place.
6. Taking care to prevent injury, lift the battery out of the battery box. A battery is heavy,
and you may need assistance to lift it.
7. Inspect the bottom of the battery box for corrosion and other damage. Clean the
bottom of the battery box and any other components in the battery box that need
cleaning.
8. Inspect the battery cables for corrosion and damage. Clean or replace the cables as
necessary for ensuring a good connection.
9. Install the new battery and secure it with the hold-down brackets. Replace the old
battery with a new battery of the same type.
10. Reconnect wiring (see Figure 6-4, page 52), taking care not to over-tighten the cable
clamps:
a. Connect the negative (–) cable to the replacement battery.
b. Connect the positive (+) cable to the replacement battery.
11. Reconnect power cable to computer box.
Storing
■ Observe battery safety precautions (see “Safety” on page 41).
■ Before storing the message sign or batteries:
See Section 6.6, “Storing the message sign,” page 47.
Clean the batteries as described in “Cleaning” on page 44.
To prevent freezing, ensure all batteries are fully charged (see “Charging” on
page 42).
■ Store batteries in a cool, dry, well-ventilated location. The storage temperature should
remain as low as possible without dropping below 32°F (0°C), and should not exceed
80°F (27°C).
■ Store batteries safely out of reach of children and pets.
■ Check state of charge every week.
■ Charge stored batteries every 30 days.
*Removing the positive cable first is a requirement for negative-ground systems.
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