Wanco Metro Variable Message Sign - Display Cabinet; Polycarbonate Window; Photocells

38 Owner’s Manual
Wanco® Metro™ Message Sign
6.2 Display cabinet
The display cabinet protects the LED display modules and other electronics inside the
cabinet. The display-cabinet door is hinged at the top and latched on the sides and
bottom. The door props open for servicing.
■ The door frame holds a clear, polycarbonate-resin thermoplastic window. During use,
the window will become dirty and require cleaning (see Section 6.2.1).
■ The gasket between the door frame and the display cabinet can become worn over
time. The gasket is important for sealing the cabinet against the weather, and should
be replaced if worn or damaged.
■ Ensure the cabinet door is closed and latched when the message sign is not being
serviced.
6.2.1 Polycarbonate window
To clean the window:
1. Follow the safety requirements in Section 2, page 3.
2. Open the display cabinet door.
3. Follow these guidelines:
■ Use a cleaning solution of mild soap and warm water. If necessary, commercial
cleaning solutions, such as Formula 409®, are acceptable. Do not use chemical or
industrial cleaning solutions.
■ Use a sponge or soft cloth and clean the window gently, using care not to scratch
the surface. Do not use a brush or squeegee.
■ To prevent spotting or streaking, dry the surface with a soft cloth or moist sponge.
4. When done, close and latch the display cabinet door.
6.2.2 Photocells
To clean the photocells:
1. Follow the safety requirements in Section 2, page 3.
2. Locate and inspect the photocells (see Figure 5-2, page 29).
3. If either the front or rear photocell appears to be dirty or otherwise obstructed, clear or
clean it using a soft, damp cloth on the photocell or its cover. For the front photocell,
clean the window if necessary (see Section 6.2.1).
4. When done, close and latch the display cabinet door.