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Fans spin at high speed

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eniac
Fans spin at high speed

Hi,

We have a problem on our bsr64000 with fans. The fans spin at high speed:

bsr64000:8A#show system fans
Fan Tray Alarm Status
GLB: [10] Failed: SecondaryI2C
Top: [10] Failed: SecondaryI2C
Top: [ 0] All Fans Good
Bot: [ 0] No Current Alarms
Bot: [ 0] All Fans Good

Top Fan Readings:
ROM Rev# = 0x83
Status = [ 10]
Alarm 1 = [ 10]
Status 1 = [ 00]
ThermOff1 = [ 4]
Therm 1 = [ 137] 28C 82F

Fan1Speed = [ 85] 2990rpms
Fan3Speed = [ 86] 2955rpms
Fan4Speed = [ 87] 2921rpms
Buck PWM1 = [ 128]
Buck PWM3 = [ 128]
Buck PWM4 = [ 128]

AckCnt 1 = [ 0] AckCnt 2 = [ 20]
MaxAckCnt1= [ 255] MaxAckCnt2= [ 20]

SetPnt 1 = [ 0] 0rpms SetPnt 2 = [ 0] 0rpms
SetPnt = [ 75] 3389rpms
Curve Rev = [ 4]
Speed 1 = [ 98] 2593 rpms Speed 2 = [ 88] 2888 rpms
Speed 3 = [ 79] 3217 rpms Speed Flt = [ 75] 3389 rpms

OvrTempLim= [ 190] 55C 131F FanFailLim= [ 196] 58C 136F
Temp 1 = [ 130] 25C 77F Temp 2 = [ 139] 29C 84F
Temp 3 = [ 148] 34C 93F

I think the temperatures are normal. We checked the air filter and the filter is OK.

Can you help with this problem?

Thank You.

Regards, Attila

cmcaldas
cards

do you have a Tx32 or TxPlus in the 1st or last slot in the chassis?
those two slots have the least amount of air flow. The downstream cards run hotter and will tell the srm it's too hot asking for fans to spin faster. rx48's are fine in the 1st slot, but not a downstream card.
what software version are you running?

eniac
Hi,

Hi,

The softwer version is : 6422.srm4

And here are the locations of cards in chassis:

bsr64000:8A#show chassis status

Current Time: 01/01-00:00:00
Running archive: FLASH:6422.srm4

Slot Type Sub Red State RM IO UpTime LastUpTime Success Failure
0 DRX RX48 - RUN x x 00:00:00 1 1
1 DRX RX48 - RUN x x 00:00:00 1 1
2 - - - - 0 0
3 - - - - 0 0
4 - - - - 0 0
5 - - - - 0 0
6 - - - - 0 0
7 SRM4 - stby x x 00:00:00 1 1
8 SRM4 7 RUN x - 00:00:00 0 0
9 - - - - 0 0
10 - - - - 0 0
11 - - - - 0 0
12 - - - - 0 0
13 DTX TX32E - RUN x x 00:00:00 1 1
14 - - - - 0 0
15 HSIM GE2/ETH8 - RUN x x 00:00:00 1 1

cmcaldas
sw

I recommend 6423 with the 2 patches

eniac
Hi,

Hi,

OK, but the cmts has worked without this problem until now. The fans spinning up only in last week.

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