Reports until 17:14, Wednesday 19 February 2020
LHO VE (VE)
gerardo.moreno@LIGO.ORG - posted 17:14, Wednesday 19 February 2020 - last comment - 19:24, Thursday 20 February 2020(55191)
Corner Station Hepta Pump Update

(Kyle R, Gerardo M)

Cooling lines were attached and cooling system was tested for leaks, flow was verified.  Oil was added per instruction manual to the gear and bearing chambers.  Power was applied to the hepta controller.

The hepta pump was started for a few seconds and stopped manually, the ON time was enough to determine that the direction of the motor is correct, and the pump ran smooth.  However we did note a red warning light ON, phase sequence, troubleshooting will be done later about what this error light means.

We did a second start, but this time we allowed for the trouble/error to shut the pump OFF, it almost took the same time as when done manually, once again the pump ran smooth but once again showing the error mentioned above.

Cooling lines were shut off and power was turned OFF for the controller.

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gerardo.moreno@LIGO.ORG - 19:24, Thursday 20 February 2020 (55213)VE

Issue with "phase sequence" error light solved, it turns out that it was not a phase error at all.

A setting for the voltage monitor relay was tripping the system, the undervoltage was set high, see photo for code shown on relay.  Setting for the undervoltage was moved to 181 volts and system did not trip anymore.

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