Rack power and cooling LED indicators (Models 951, 95E)

This section contains rack power and cooling FRUs that have LED indicators. Each listed assembly is shown with a description of its LEDs. Although LED indicators may indicate a failure, they should not be used as a starting point for a repair.

Rack power and cooling FRUs with LEDs

Table 1. Parts of the rack power and cooling assembly that contain LEDs
Assembly	Reference
Local remote switch card	Figure 6
Power distribution unit	Figure 5
PPS Overview (front) PPS 208VDC power module Booster power module Sequencer module	Figure 1 Figure 2 Figure 3 Figure 4
Rack identity card	Figure 7
Rack operator panel assembly	Figure 8
RPC card	Figure 9

LEDs on the primary power supply (front)

Table 2. Interpreting LEDs on the primary power supply (front)
Index	LED Function	Color	LED Off	LED On	LED Flash
1	Identify for primary power supply	Amber	Normal	n/a	Identify
2	AC input good	Green	missing input or CB00 off	Normal	n/a
3	UEPO loop good	Green	PPS off or UEPO switch is tripped	Normal	n/a
4	208VDC output power good	Green	PPS off	Normal	n/a See note 3
5	DDM output power good	Green	PPS off	Normal	n/a See note 3
6	PPS fault	Amber	Normal	error See note 1	n/a
7	On battery	Amber	Normal	error See note 2	n/a
8	Status display (see MAP2340 Codes on the PPS status display)	n/a	n/a	n/a	n/a
Notes: Indicates one of the following: The PPS has detected an internal error in which case the status display 8 should be displaying a code and an open serviceable event should exist. The PPS cannot communicate with the other PPS in the same rack, or the other PPS has an error. During a repair of the failing PPS, the FRU Identify LED 1 is used to determine the failing PPS. Both customer mainline power inputs to this rack have been lost and the PPSs are using rack battery power to safely shutdown the storage facility. Indicates one of the following: PPS firmware is being updated. PPS PBCM corruption has occurred (call next level of support).

LEDs on the 208VDC power module

Table 3. Interpreting LEDs on the 208 VDC power module
Index	LED Function	Color	LED Off	LED On	LED Flash
1	Identify	Amber	Normal	n/a	Identify
2	208VDC output	Green	PPS off	Normal	n/a
2	208VDC output	Amber	PPS off	Fault	n/a

LEDs on the booster power module

Table 4. Interpreting LEDs on the booster power module
Index	LED Function	Color	LED Off	LED On	LED Flash
1	Identify	Amber	Normal	n/a	Identify
2	208VDC output	Green	PPS off	Normal	n/a
2	208VDC output	Amber	PPS off	Fault	n/a

LEDs on the sequencer module

Figure 4. LEDs on the PPS sequencer module

Table 5. Interpreting LEDs on the sequencer module
Index	LED Function	Color	LED Off	LED On	LED Flash
1	Main 208VDC output	Green	PPS off	Normal	n/a
1	Main 208VDC output	Amber		Fault
2	Protected 208 VDC output 0	Green		Normal
2	Protected 208 VDC output 0	Amber		Fault
3	Protected 208 VDC output 1	Green		Normal
3	Protected 208 VDC output 1	Amber		Fault

LEDs on the Power Distribution Unit

Figure 5. Output power indicator (LED) for a power distribution unit

Table 6. Interpreting LEDs on the power distribution unit
Index	LED Function	Color	LED Off	LED On	LED Flash
1	Output power	Green	Off¹	Normal	n/a

Note 1: Each power output port is protected by a non-replaceable fuse. If only one output power LED is off, there is a problem with the power distribution unit.

LED on the local remote switch card

Model 951, Model 961 "Identify" indicators (LEDs) for local remote and zSeries local remote switch cards — Figure 6. Local remote card cables

Table 7. Interpreting LEDs on the local remote switch card
Index	LED Function	Location	Color	LED Off	LED On	LED Flash
3	Identify	C6	Amber	Normal	N/A	Identify

LEDs on the rack identity card

Table 8. Interpreting LEDs on the rack identity card
Index	LED Function	Location	Color	LED Off	LED On	LED Flash
1	Identify	C5	Amber	Normal	N/A	Identify

LEDs on the rack operator panel assembly

Figure 8. Rack operator panel LEDs on upper right of rack front cover

Table 9. Interpreting LEDs on the rack operator panel assembly
Index	LED Function	Color	LED Off	LED On	LED Flash
1	Line cord 1	Green	¹	²	³
2	Line cord 2	Green	¹	²	³
3	Identify or System Attention	Amber	Normal	Attention⁴ (Rack-1 only)	Identify⁴
Notes: Off under any of the following conditions: Customer power is not present Standby power is present and the Remote Force Power Off is not active The corresponding RPC or PPS is fenced The LED is broken On solid when PPS DDM power is on. Flashes slow (1 flash per 2 seconds) when a PPS is in Standby, a PPS is not fenced, or the Remote Force Power Off switch is active. Flashes rapidly (2 flashes per second) during the PPS power ON, power OFF, and Force Power OFF sequences. This LED is used for the following purposes: For Rack-1 only: If the LED is lit solid, it indicates Attention status, which means that one or more open serviceable events needing repair exist. When all serviceable events have been closed or cancelled, the LED changes to off. When both attention and identify status exist on Rack 1, the identify indication is shown and the LED flashes. For all racks: If the LED is flashing, it indicates Identify status, which means the service representative is replacing a part that was selected from a serviceable FRU list or from the Parts Exchange menu option. Note: Most, but not all, FRUs have identify indicators. The "light path" identify LEDs are a hierarchy of LEDs that can identify the rack, enclosure, FRU, and even the FRU connector for which a cable is connected.

LEDs on the RPC cards

Table 10. Interpreting LEDs on the RPC cards
Index	LED Function	Location	Color	LED Off	LED On	LED Flash
1	Operational	C2	Green	fenced, not booted, or no input power	operational	n/a
2	Identify	C2	Amber	Normal	¹	Identify
3	Operational	C1	Green	fenced, not booted, or no input power	operational	n/a
4	Identify	C1	Amber	Normal	¹	Identify
Notes: When this LED is on solid, the flash memory in the other RPC card is corrupted.