The water issue has been resolved - merely incorrect temperature guages (replaced). Water is 20 C as required.

S4 conditions at 13:12 CEST

26.5 C / 47.2 % / Td = 14.3 C

Based on email by TD doing the following procedure to  ensure FEEs are OK after water issue

1) disconnect the power cables of *all* FEE64s at the FEE64 PSUs
2) re-connect power cable, power-up and check/test the FEE64s
  *one at a time* until stable operatinmg temperature is achieved
... say 30mins?

13:34 CEST: All be FEE1 unplugged. Powering on!

Vertex temp read slightly warm (67 C) so powered off. Waiting for a while for water to circulate since off for a while...

15:01 CEST: FEE1 Powered on again, Vertex reading 67 C again but it's stable and slowly going down. Watching and seeing but I think it's OK.
15:35 CEST: FEE1 has been stable around 67 C all the time. Other temps fine. Presuming this isn't a major concern. (Perhaps related to reasonably warm/humid conditions?)

15:47 CEST: FEE2 Powered on.
16:02 CEST: Temperature stable, not exceeded 60 C.

16:07 CEST: FEE3 Powered On.
16:17 CEST: Temperature stable, peaked at 58.44 C

16:21 CEST: FEE4 Powered On.
16:40 CEST: Both FPGA and ASIC reading warm: 65.5 C and 58 C. Seeming to not be rising anymore.

16:41 CEST: FEE5 Powered On.
16:53 CEST: Temperature stable, at 64 C

16:56 CEST: FEE6 Powered On.
17:12 CEST: FPGA temp is ok but ASIC warm. Tmax ASIC = 56.88, FPGA = 55.38, PSU = 27.44

17:15 Turning FEEs and Water off for the weekend
Will test 7-12 on Monday.
Might be cooler in S4.

Cooling seems to be working but temps hotter than before.