CEC enclosure location codes (Models 982, 988)

You can identify the CEC enclosure in which a field replaceable unit (FRU) is plugged by its location code. The first character of the location code is always U followed by a four-character feature code or enclosure type, as shown in the following example:

U78C7.001.10ABCDE-P2-C14

In this example, the enclosure type is 78C7. The next three characters of the location code indicate the model of the enclosure (001 in the example). The next string of characters provides the enclosure serial number (10ABCDE in the example).

CEC enclosures for Models 982, 988 are normally feature code U78C7.001.

Table 1. Feature codes and related systems
Feature code (U`tttt`)	System	For storage model
U78C7.001	8408-E8E	982, 988
U78C9.001	8286-42A	981, 985, 986
U78CB.001	8284-22A	980, 984

The CEC enclosure type (feature code) label is on the top of the CEC enclosure, behind the front cover, above the drive enclosure.

Table 2 summarizes the CEC enclosure assembly with references to figures that display location codes.

For part numbers, see CEC enclosure part numbers, Models 982, 988.

Table 2. Summary of CEC enclosure assembly locations
Assembly	Reference
CEC enclosure front location codes	Figure 1
CEC enclosure top location codes	Figure 2
CEC enclosure rear location codes	Figure 3

CEC enclosure front overview

CEC enclosure location codes (front view) (Model 982) — Figure 1. CEC enclosure location codes (front view) (Models 982, 988)

Table 3. CEC enclosure location codes (front)
Location code	Part name	Connector
U`n`-A1	CEC enclosure fan 1
U`n`-A2	CEC enclosure fan 2
U`n`-A3	CEC enclosure fan 3
U`n`-A4	CEC enclosure fan 4
U`n`-A5	CEC enclosure fan 5
U`n`-A6 to A9	CEC enclosure fan 6 - 9 See Figure 4 and Table 6
U`n`-D1	CEC enclosure control panel assembly
U`n`-P1	CEC enclosure I/O backplane See Figure 2, Table 4, Figure 3, and Table 5
U`n`-P1-T3 U`n`-P1-T4	Not used	USB 3.0
U`n`-P2	CEC enclosure system backplane See Figure 2 and Table 4
U`n`-P3	CEC enclosure RAID card See Figure 4 and Table 6
U`n`-P4	CEC enclosure disk drive backplane See Figure 4 and Table 6
U`n`-P4-D1	Not used
U`n`-P4-D2 to D9	CEC enclosure disk drive
U`n`-P4-D10 to D13	Not used

CEC enclosure top overview

CEC enclosure location codes (top view) (Model 982) — Figure 2. CEC enclosure location codes (top view) (Models 982, 988)

Table 4. CEC enclosure location codes (top)
Location code	Part name	Connector
U`n`-P1	CEC enclosure I/O backplane
U`n`-P1-C5	CEC enclosure service processor card
U`n`-P1-C5-C1	CEC enclosure time-of-day battery card
U`n`-P1-C13	CEC enclosure I/O voltage regulator module (VRM)
U`n`-P1-C14	CEC enclosure vital product data (VPD) card
U`n`-P2	CEC enclosure system backplane
U`n`-P2-C1	CEC enclosure processor voltage regulator module (VRM) 1
U`n`-P2-C2	CEC enclosure processor module 1
U`n`-P2-C3	CEC enclosure processor module 2
U`n`-P2-C4	CEC enclosure processor VRM 2
U`n`-P2-C5	CEC enclosure processor VRM 3
U`n`-P2-C6	CEC enclosure processor module 3
U`n`-P2-C7	CEC enclosure processor module 4
U`n`-P2-C8	CEC enclosure processor VRM 4
U`n`-P2-C9	CEC enclosure memory regulator module (VRM)
U`n`-P2-C10 to C41	CEC enclosure memory module
U`n`-P2-C42	CEC enclosure memory VRM
U`n`-P5	CEC enclosure power midplane (not shown, located under P1)
U`n`-Y1	CEC enclosure firmware

CEC enclosure rear overview

CEC enclosure location codes (rear view) (Model 982) — Figure 3. CEC enclosure location codes (rear view) (Models 982, 988)

Table 5. CEC enclosure location codes (rear view)
Location code	Part name	Connector
U`n`-E1	CEC enclosure power supply 1
U`n`-E2	CEC enclosure power supply 2
U`n`-E3	CEC enclosure power supply 3
U`n`-E4	CEC enclosure power supply 4
U`n`-P1	CEC enclosure I/O backplane
U`n`-P1-C1	Not used
U`n`-P1-C2	CEC enclosure PCIe two-port card
U`n`-P1-C2-T1		CXP (PCIe)
U`n`-P1-C2-T2		CXP (PCIe)
U`n`-P1-C3	CEC enclosure PCIe two-port card
U`n`-P1-C3-T1		CXP (PCIe)
U`n`-P1-C3-T2		CXP (PCIe)
U`n`-P1-C4	Not used
U`n`-P1-C5	CEC enclosure service processor card
U`n`-P1-C5-T1	Not used	USB 2.0
U`n`-P1-C5-T2	Not used	USB 2.0
U`n`-P1-C5-T3	Not used	Serial
U`n`-P1-C5-T4	HMC port 1 (used for private network)	Ethernet (service processor)
U`n`-P1-C5-T5	HMC port 2 (used for private network)	Ethernet (service processor)
U`n`-P1-C6	CEC enclosure I2C interface card assembly
U`n`-P1-C6-T1		I2C (to RPC)
U`n`-P1-C6-T2		I2C (to RPC)
U`n`-P1-C7	CEC enclosure RS-485 serial-interface card
U`n`-P1-C7-T1		RS-485 serial (to RPC)
U`n`-P1-C7-T2		RS-485 serial (to RPC)
U`n`-P1-C8	CEC enclosure PCIe two-port card
U`n`-P1-C8-T1		CXP (PCIe)
U`n`-P1-C8-T2		CXP (PCIe)
U`n`-P1-C9	Not used
U`n`-P1-C10	CEC enclosure PCIe two-port card
U`n`-P1-C10-T1		CXP (PCIe)
U`n`-P1-C10-T2		CXP (PCIe)
U`n`-P1-C11	CEC enclosure Ethernet four-port card
U`n`-P1-C11-T1		Ethernet (LPAR)
U`n`-P1-C11-T2		Ethernet (LPAR)
U`n`-P1-C11-T3		Ethernet customer network (optional feature, if used)
U`n`-P1-C11-T4		Ethernet customer network (optional feature, if used)
U`n`-P1-C12	CEC enclosure Ethernet adapter (10 Gb and 1 Gb)
U`n`-P1-C12-T1		Ethernet customer network, 10 Gb optical (optional feature, if used)
U`n`-P1-C12-D2-T1¹
U`n`-P1-C12-T2		Ethernet customer network, 10 Gb optical (optional feature, if used)
U`n`-P1-C12-D2-T2¹
U`n`-P1-C12-T3		Ethernet customer network 1 Gb RJ45 (optional feature, if used)
U`n`-P1-C12-D2-T3¹
U`n`-P1-C12-T4		Ethernet customer network 1 Gb RJ45 (optional feature, if used)
U`n`-P1-C12-D2-T4¹
U`n`-P1-T1	Not used	USB 3.0
U`n`-P1-T2	Not used	USB 3.0
U`n`-P5	CEC enclosure power midplane (not shown, located under P1)
Notes: 1. Some messages and displays might show this location as U`n`-P1-C12-D2-T`x` instead of U`n`-P1-C12-T`x`.

CEC enclosure location codes (assembly view) (Model 982) — Figure 4. CEC enclosure location codes (assembly rear view) (Models 982, 988)

Table 6. CEC enclosure location codes (assembly view)
Location code	Part name	Connector
U`n`-A6	CEC enclosure fan 6
U`n`-A7	CEC enclosure fan 7
U`n`-A8	CEC enclosure fan 8
U`n`-A9	CEC enclosure fan 9
U`n`-P3	CEC enclosure RAID card
U`n`-P4	CEC enclosure disk drive backplane