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Battery Backup Unit (BBU) — Installation & Maintenance Manual Continued

4.8 Turn on the Power Supply to the BBU. Verify LED indicator on the side of the BBU is ﬂashing or steady

GREEN, see [Figure 14] below. Electrically command the actuator full open and close to verify proper

actuator operation.

4.9 Rotate the actuator to the position opposite of the Fail Position. Turn off the Power Supply and verify

that the BBU drives the actuator to the full Fail Position and the LED indicator on the side of the BBU

is Rapidly ﬂashing RED. After the actuator has reached full Fail Position, the LED indicator will Slowly

ﬂash RED. See [Figure 15] for details.

Figure 14

Figure 15

Indication Description

Solid Green The BBU is powered and the

batteries are fully charged.

Flashing Green The BBU is powered and the

batteries are charging.

Fast Flashing Red The BBU is not powered and the

actuator is seeking the fail position.

Slow Flashing Red The BBU is not powered and the

BBU is in low power stand-by.