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This page is to help identify issues with the operation on the telescope and corrective action.

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Date

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Issue

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Symptoms

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Corrective Action

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titleTroubleshooting topics
excerptTypesimple
cqllabel = "troubleshooting" and space = "EE"

1

4/19/22

Mount did not go active

Aborted-Error 2

az

Az failed with error(-14) controller interlocked

alt

Alt failed with error(-14) controller interlocked

Beckhoff error: external error

Reset Phase guard in MDC2 (service ring) cycle 3p circuit breaker above unit.

Phase guard was replaced 7/26/21 continue to monitor.

2

4/19/22

M3 fault

aborted- Hardware exceeption when setting PI E-712 servo mode

Reset PI controller in PA&C rack.

IT working on ports may have caused issue.

3

4/19/22

Pflow Coude door stuck open

Pflow Coude lab Roll up door doesn’t close (stuck open)

Re-stripped switch wires and terminate

Switch wires oxidized

4

10/17/22

Mount Motor Drive Fault.

MDC2 Phase Guard fault. Reset and it cleared.