AssuredSAN 4004 Series Setup Guide 127
Fan control module LEDs
Unlike the 2U models, the 4U56 provides a fan control module (FCM) FRU.
Figure 106 LEDs: Fan control module — rear panel (4U56)
Optional drive enclosures for storage expansion
AssuredSAN 4004 Series controller enclosures support a variety of AssuredSAN drive enclosures that can
optionally be procured for adding storage. The following subsections describe drive enclosure LEDs.
NOTE: See Table 4 on page 39 for a comparative tabular view of AssuredSAN drive enclosures
supported by AssuredSAN controller enclosures.
Representative cabling examples showing controller enclosure and drive enclosure cascades are provided
in LED descriptions.
NOTE: See Connecting the controller enclosure and drive enclosures on page 38 for drive enclosure
cabling.
LED No./Description Color State Definition
1 — FRU OK Green On Power is on with at least one fan operating normally.
Off Both fans are off; the system is powered off.
2 — Fault/Service Required Amber On Fault detected; event has been acknowledged but the
problem needs attention.
Off No fault condition exists.
3 — Unit locator
White
On FRU is identified.
Off Normal operation.