IBM TotalStorage SAN256N Director 2045-N16, Installation And Maintenance Manual, Page: 30 / 157

SAN256N Director 2045-N16
10
• TFIO blades
• TSW modules
• TCM modules
• Power supply assemblies
• Fans, upper and side assemblies
Figure 7. TCM control module
Front panel indicators
Each TCM has four LED indicators on the front panel to indicate TCM status. The
functionality and colors are as follows:
• Fault LED - Lights red to indicate when an error condition has occurred.
• Online LED - Lights green to indicate when the module is in an Online state.
• Power OK LED - Lights green to indicate that DC power to the module is within
tolerances and the module is not in a power on reset condition.
• Heartbeat LED - Lights yellow and toggles off and on every second, indicating that the
module is functioning correctly. Error conditions are indicated by distinctive blink
patterns.
Three additional LED indicators on the front panel indicate system power and cooling
fan operational status. The functionality and colors are as follows:
• Sys Pwr A LED - System Power A lights red to indicate a failure of the Primary power
supply.
• Sys Pwr B LED -System Power B lights red to indicate a failure of the Secondary
power supply.
TCM control module
TCM module
front panel
LCD status
display