NIRSPEC will on occasion require power cycling. The main power breaker is located on the forward rack; it controls the Pulizzi power strip. The NIRSPEC server software must be stopped before turning off power. To stop the server:

1. Log on to waimea as user "nirspec".
2. Type "stop_nirspec".

To access the forward rack, remove the Right-Forward insulation panel. Power cycle the main breaker with a 5 s delay.
Image of forward rack front panel, lower half.

If power to NIRSPEC is interrupted, due to loss of instrument cooling or HELCO dropouts, restoring communication from the host computer waimea to the instrument will be required.

If the instrument cooling system is under repair, or needs to be restarted, NIRSPEC's main power should be shut off until the glycol flow is stable. Pulsating flow will cause the flow switch to turn the power off and on repeatedly; such multiple power cycles of the instrument are potentially damaging. Inspect the flow switch indicator on the NIRSPEC cooling module prior to restoring power.

To restore communications, at a waimea prompt, type "stop_nirspec". If this command fails, type "psgrep server". If a single nirspec_server_bin process remains, then the SCSI/fiber extender located on the shelves adjacent to the K2 interconnect rack must be power cycled (it is labeled NIRSPEC TRANSPUTER). Afterwards, type "runserver" to test communication. The operator in K2 remote ops will need to exit all frozen GUI's, and re-start the instrument from the NIRSPEC Control Menu.

The document Troubleshooting server problems can be consulted for direction in the event that the server cannot be restarted successfully.

When NIRSPEC is undergoing a cooldown or a warmup, or the cryogenic state is interrupted by loss of CCR cooling, it may be necessary to power off the motor controller to avoid driving the cryogenic mechanisms when temperatures are not stable.

The motor controller and driver power supply is located in the forward rack; its power switch is found on the back of the rack, opposite and above the main power breaker. To access the motor power switch, remove the Left-Forward-Top insulation panel (it is labeled), and turn on or off the motor power as directed.
Image of back of forward rack, motor power supply.