Support Case Summary for ICX7150-C12-POE – PoE Fatal Vmain (48V) Fault

[Shiv1080]

Switch Model and Serial

• Model: Ruckus ICX7150-C12-POE

• Serial #: FEK3249N11X

Current Firmware and Boot-Monitor

• Switch OS Version: 08.0.80fT211, previously 08.0.90kT211

• Boot-Monitor Version (current): 10.1.14T225 (mnz10114), previously 10.1.15T225 (mnz10115)

• Recent upgrade attempts: Updated both system image and boot-monitor via TFTP per official Ruckus documentation.​

Troubleshooting Steps Performed

• Performed full factory reset and reload, confirmed startup with factory defaults.

• Upgraded firmware and boot-monitor to latest available per Ruckus support downloads.​

• Attempted configuration changes, checked running config, and verified enable/admin credentials.

• Power-cycled unit multiple times, including long power-off for several hours.

• Attempted to initialize PoE by plugging known-good Ruckus R510 APs, using original and alternate Ethernet cables.

• Ran extensive CLI and console commands for system status and PoE (“show version,” “show running-config,” “show boot-monitor,” “show inline power”).

• Observed boot logs and live console output during normal and TFTP recovery/reflash cycles.

• Confirmed power supply detection, normal system initialization, and correct PoE module reporting (before error manifests).

Observed Errors and Logs

Console and system log entries:

text

PoE Fatal: Vmain (48V) fault has forced all ports on slot 0 to lose power. U1-MSG: PoE Severe Error: PSU voltage is lower than min limit. Port 1/1/3 powered down. RMA the PSU. PoE: Power disabled on port 1/1/3 because of PSU voltage drop. PoE Fatal: Vmain (48V) fault has forced all ports on slot 0 to lose power. (repeated for all PoE ports 1/1/1 through 1/1/12)

• No PoE device is able to receive power even briefly. Oper state always “Off”; power allocation = 0. No cable/AP/circuit resolves behavior.

Documentation and Resources Used

• Ruckus Lennar Knowledge Base: Factory Reset and Recovery​

• ICX 7150 Boot-Monitor and Firmware Update Process​

• ICX POE Troubleshooting Official Guides​

• [Community case studies and official recommendations for “Vmain (48V) fault”]​

Summary and Request

All recommended troubleshooting steps (factory reset, power cycle, firmware and boot-monitor update, config/CLI analysis, swap cables/APs) have been exhausted.
Persistent and recurrent “PoE Fatal: Vmain (48V) fault” and “PSU voltage is lower than min limit. RMA the PSU” clearly indicate a hardware failure in the PoE subsystem or the switch's internal PSU.
Please advise on replacement or RMA procedure as suggested in the manufacturer error logs.

Ruckus Wireless Bootloader: 10.1.14T225 (Nov 15 2018 - 04:59:18 -0800)

Booted from partition 2
DRAM: Validate Shmoo parameters stored in flash ..... OK

ICX7150-12 (POE), PVT1
SYS CPLD VER: 0x4 Released Ver: 0xa

device 0 offset 0x0, size 0xc0000
Enter 'b' to stop at boot monitor: 0
device 0 offset 0x0, size 0xc0000
bootdelay: ===
Booting image from Primary

NAND read: device 0 offset 0x0, size 0x2000000
33554432 bytes read: OK
## Loading kernel from FIT Image at 70000200 ...
Using 'conf@1' configuration
Trying 'kernel@2' kernel subimage
Description: Ruckus Linux MN VER=08.0.80f
Type: Kernel Image
Compression: lzma compressed
Data Start: 0x70213ed4
Data Size: 2183799 Bytes = 2.1 MiB
Architecture: ARM
OS: Linux
Load Address: 0x61008000
Entry Point: 0x61008000
Hash algo: crc32
Hash value: 731b1499
## Loading kernel from FIT Image at 70000200 ...
Using 'conf@1' configuration
Trying 'kernel@2' kernel subimage
Description: Ruckus Linux MN VER=08.0.80f
Type: Kernel Image
Compression: lzma compressed
Data Start: 0x70213ed4
Data Size: 2183799 Bytes = 2.1 MiB
Architecture: ARM
OS: Linux
Load Address: 0x61008000
Entry Point: 0x61008000
Hash algo: crc32
Hash value: 731b1499
Verifying Hash Integrity ... crc32+ OK
## Loading ramdisk from FIT Image at 70000200 ...
Using 'conf@1' configuration
Trying 'ramdisk@1' ramdisk subimage
Description: Ramdisk -rootfs
Type: RAMDisk Image
Compression: lzma compressed
Data Start: 0x7042fb00
Data Size: 21581049 Bytes = 20.6 MiB
Architecture: ARM
OS: Linux
Load Address: 0x00000000
Entry Point: 0x00000000
Hash algo: crc32
Hash value: 79d05c51
Verifying Hash Integrity ... crc32+ OK
## Loading fdt from FIT Image at 70000200 ...
Using 'conf@1' configuration
Trying 'fdt@3' fdt subimage
Description: Flattened Device Tree blob
Type: Flat Device Tree
Compression: uncompressed
Data Start: 0x7042d8a8
Data Size: 8607 Bytes = 8.4 KiB
Architecture: ARM
Hash algo: crc32
Hash value: 6fc9a37b
Verifying Hash Integrity ... crc32+ OK
Loading fdt from 0x7042d8a8 to 0x65008000
Booting using the fdt blob at 0x65008000
Uncompressing Kernel Image ... OK
Using Device Tree in place at 65008000, end 6500d19e

Starting kernel ...

booting with 4.4 kernel
NAND Type: Micron NAND 2GiB (x 1)
PLATFORM MN
dd cmd: UBI
Config partition mounted
Resource partition is mounted!!
Kernel crashdump is disabled.
Backup is fine
dma_mem_base: 0x96000000, dma_mem_len: 0x8000000, warm_mem_base: 0x9f500000, warm_mem_len: 0xb00000
Creating TUN device
Starting TPM Infra
Group tss and User tss created
kernel.hostname = localhost
hostname set to localhost
Starting TCSD Daemon
TCSD Up and Running
Enabling time stamp.
Starting the FastIron.
USER=root
HOME=/
GCOV_PREFIX=/fast_iron
ethaddr=78:a6:e1:3e:1f:ff?
TERM=vt102
PATH=/sbin:/usr/sbin:/bin:/usr/bin
crashkernel=64M@0x70000000
ip=192.168.0.3:192.168.0.2:192.168.0.2:255.255.255.0:MN:eth0:off
SHELL=/bin/sh
PWD=/
i2c-0 i2c Broadcom iProc I2C adapter I2C adapter 2
i2c-1 i2c Broadcom iProc I2C adapter I2C adapter 2
FIPS Disabled:PORT NOT DISABLED
platform type 90
OS>
Loaded Image SPS08080f from Pri Built on (UTC): Tue Apr 7 05:34:07 2020
Enabling Console Logging
Applying factory defaults..
flash_file=0.
INFO: startup config data is not available, try to read from backup
INFO: startup config data in the backup area is not available
Hotplugger Daemon Initialized ..
External USB disk is not mounted or plugged in.
set_board_level: gi_board_type = 116[ 53.821118] linux-kernel-bde: map phys range 0x3200000-0x3240000 to 0xb0c4f000-0xb0c8f000
[ 54.003477] linux-kernel-bde: map phys range 0x88100000-0x90100000 to 0xa8c4f000-0xb0c4f000
DMA pool size: 134217728
PHY Reset De-asserted
sw_pp_sdk_init:137 ToR init
SOC unit 0 attached to PCI device BCM56160_B0
Firmware version from File: 2.1.1
Pre Parsing Config Data ...
INFO: empty config data in the primary area, try to read from backup
INFO: empty config data in the backup area also

Warning: This operation would close all existing SSH connection.
Parsing Config Data ...
INFO: empty config data in the primary area, try to read from backup
INFO: empty config data in the backup area also

System initialization completed...console going online.
Copyright (c) 2017 Ruckus Wireless, Inc. All rights reserved.
UNIT 1: compiled on Apr 6 2020 at 22:29:25 labeled as SPS08080f
(25976488 bytes) from Primary SPS08080f.bin
SW: Version 08.0.80fT211
Compressed Boot-Monitor Image size = 786944, Version:10.1.14T225 (mnz10114)
Compiled on Thu Nov 15 12:59:22 2018

HW: Stackable ICX7150-C12-POE
==========================================================================
UNIT 1: SL 1: ICX7150-C12-2X1G POE 12-port Management Module
Serial #:FEK3249N11X
Software Package: BASE_SOFT_PACKAGE
Current License: 2X1G
P-ASIC 0: type B160, rev 11 Chip BCM56160_B0
==========================================================================
UNIT 1: SL 2: ICX7150-2X1GC 2-port 2G Module
==========================================================================
UNIT 1: SL 3: ICX7150-2X10GF 2-port 20G Module
==========================================================================
1000 MHz ARM processor ARMv7 88 MHz bus
8192 KB boot flash memory
2048 MB code flash memory
1024 MB DRAM
STACKID 1 system uptime is 7 second(s)
The system started at 00:55:05 GMT+00 Sat Jan 01 2000

The system : started=cold start

ICX7150-C12 Switch>

ICX7150-C12 Switch>Info: Device Key or Cert file is not available

PS 1, Internal Power supply detected.
PS 1, Internal Power supply is up.
PoE: Stack unit 1 PS 1, Internal Power supply with 124000 mwatts capacity is up
PoE Info: Adding new 54V capacity of 124000 mW, total capacity is 124000, total free capacity is 124000
PoE Info: PoE module 1 of Unit 1 on ports 1/1/1 to 1/1/12 detected. Initializing....
2000 log entries of PoE Event Trace Log Buffer is allocated on unit 1 for unit 1
PoE Event Trace Logging enabled for unit 1
PoE Info: PoE module 1 of Unit 1 initialization is done.
PoE: Power enabled on port 1/1/3.
PoE: Power enabled on port 1/1/4.
PoE Fatal: Vmain (48V) fault has forced all ports on slot 0 to lose power.
U1-MSG: PoE Severe Error: PSU voltage is lower than min limit. Port 1/1/1 powered down. RMA the PSU.
U1-MSG: PoE Severe Error: PSU voltage is lower than min limit. Port 1/1/3 powered down. RMA the PSU.
PoE: Power disabled on port 1/1/3 because of PSU voltage drop.
U1-MSG: PoE Severe Error: PSU voltage is lower than min limit. Port 1/1/4 powered down. RMA the PSU.
PoE: Power disabled on port 1/1/4 because of PSU voltage drop.
U1-MSG: PoE Severe Error: PSU voltage is lower than min limit. Port 1/1/7 powered down. RMA the PSU.
PoE Fatal: Vmain (48V) fault has forced all ports on slot 0 to lose power.
PoE Fatal: Vmain (48V) fault has forced all ports on slot 0 to lose power.
PoE Fatal: Vmain (48V) fault has forced all ports on slot 0 to lose power.
PoE Fatal: Vmain (48V) fault has forced all ports on slot 0 to lose power.
PoE Fatal: Vmain (48V) fault has forced all ports on slot 0 to lose power.
PoE Fatal: Vmain (48V) fault has forced all ports on slot 0 to lose power.
PoE Fatal: Vmain (48V) fault has forced all ports on slot 0 to lose power.
PoE Fatal: Vmain (48V) fault has forced all ports on slot 0 to lose power.
PoE Fatal: Vmain (48V) fault has forced all ports on slot 0 to lose power.
PoE Fatal: Vmain (48V) fault has forced all ports on slot 0 to lose power.
PoE Fatal: Vmain (48V) fault has forced all ports on slot 0 to lose power.
PoE Fatal: Vmain (48V) fault has forced all ports on slot 0 to lose power.
PoE Fatal: Vmain (48V) fault has forced all ports on slot 0 to lose power.
PoE Fatal: Vmain (48V) fault has forced all ports on slot 0 to lose power.
PoE Fatal: Vmain (48V) fault has forced all ports on slot 0 to lose power.
PoE Fatal: Vmain (48V) fault has forced all ports on slot 0 to lose power.
PoE Fatal: Vmain (48V) fault has forced all ports on slot 0 to lose power.
PoE Fatal: Vmain (48V) fault has forced all ports on slot 0 to lose power.
PoE Fatal: Vmain (48V) fault has forced all ports on slot 0 to lose power.
PoE Fatal: Vmain (48V) fault has forced all ports on slot 0 to lose power.

[Imran_ruckus]

Hi @Shiv1080 

Greetings!!!

Thank you for reaching out to the RUCKUS Lennar Home Community. 

We appreciate your patience and understanding as we work to resolve the issues you are experiencing with your RUCKUS setup.

Based on the information provided, it appears that you are encountering issues with the RUCKUS ICX-7150-C12P Switch PoE ports.

We apologize for any inconvenience this has caused and are committed to assisting you promptly.

Could you please share a pictures showing the RUCKUS Switch and CLI screen with the Vmain (48V) error?

Please log into your RUCKUS Account before uploading these photos/screenshots.

Please share the requested pictures and should you have any further questions or concerns, feel free to reach out. 

We appreciate your cooperation and look forward to resolving this matter for you promptly.

Best regards,
Imran Sanadi
RUCKUS | Lennar Home Community Support

[Imran_ruckus]

Hi @Shiv1080 

Greetings!!!

I trust this message finds you well.

I kindly request an update on the status of the issue so that we may proceed further with resolving it.

Thank you.

Best regards,
Imran Sanadi
RUCKUS | Lennar Home Community Support

[Imran_ruckus]

Hi @Shiv1080 

Greetings!!!

I trust this message finds you well.

I kindly request an update on the status of the issue so that we may proceed further with resolving it.

Thank you.

Best regards,
Imran Sanadi
RUCKUS | Lennar Home Community Support

[Imran_ruckus]

Hi @Shiv1080 

Greetings!!!

I trust this message finds you well.

I kindly request an update on the status of the issue so that we may proceed further with resolving it.

Thank you.

Best regards,
Imran Sanadi
RUCKUS | Lennar Home Community Support