patrick.thomas@LIGO.ORG - posted 19:46, Wednesday 17 April 2019 - last comment - 20:00, Wednesday 17 April 2019(48580)
ALS X not locking
Green X arm not locking ALS X: Messages: Fiber polarization, PLL, PDH Set to DOWN, INIT ALS_CUST_LOWNOISEVCO frequency servo controls error, low limit reached, flashing Hit RESET on ALS_CUST_LOWNOISEVCO, Frequency Servo, cleared briefly, errors returned
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I guess it was just the polarization. I lowered it from 30 to 27 and it was fixed.