Troubleshooting: RCC

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The RCC and its subsystems

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Fig. 1: RCC control panel top middle section with manual control switch key
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Fig. 2: RCC control panel bottom-left part
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Fig. 3: Emergency cable switch at the west side of the north pillar of the RCC telescope
  • Problem: Dome does not rotate, however in ccdsh, it appears to. Solution 1: Consult the rcc status command in ccdsh. If CRIO FPGA status is on normal, then check the frequency switcher in the dome. It is in a gray box with a high voltage sign on it, right next to the manual dome rotating wheel. Several standard cabinet keys can be found in the dome, check the control desk or the top of telescope control cabinet next to the door. If E8 can be seen on the frequency switcher, the malfunction is probably caused by power failure. Exit from ccdsh and press the 0 button on the frequency switcher to reset it. If it does not work, turn off and on the dome control several times. The switches are in a built-in cabinet right behind the control deck. Note that the switch labeled "Csúszógyűrű" has to be turned off first, and turned on second. If the "E8" message does not turn into "Stop" after a few tries, notify the head of technical department. Also note that this problem can be caused by a partial power failure, which cannot be noticed otherwise (i.e. in very rare cases, it might happen during observations, while the telescope continues to operate normally). After a long power failure, it may be necessary to start the CRIO (just start the ccdsh) before checking the frequency switcher, as it can be turned off completely. Solution 2: Consult the rcc status command in ccdsh. If CRIO FPGA status is on recovery, restart the CRIO by manually turning off and on its main power (two red switches on the gray electric cabinet in the dome right near the entrance).
  • Problem: Dome slit does not open/close, set dome slit stop does not solve the problem. Solution 1: Try to switch to manual dome positioning by rcc dome manual and rotate the dome to its base position: set dome azimuth=156.3. Solution 2: if it does not work, try restarting the CRIO by manually turning off and on its main power (two red switches on the gray electric cabinet in the dome). Do not do this without the support astronomer!
  • Problem: Telescope does not move/track. Solution: Check the CRIO error code. One of the emergency switches could be pushed in the dome, check the red buttons. If this does not help, turn off and on the main switch in the RCC dome. This also powers down the OCELOT EMCCD and m16, so do a proper shutdown beforehand (check that the camera is warmed up, stop the ixon-server, shutdown m16, see Usage of OCELOT on the RCC.) Do this only, if you are absolutely sure what you are doing!
  • Problem: The telescope does not move because it is too near to the horizon or to the north pillar. Solution: you need to move it out of the forbidden zone manually, as follows:
    • 1. Turn the key switch on the control panel to 'manual / kézi üzem' position (Fig. 1).
    • 2. The controls on the bottom left section of the control panel (Fig. 2) should now be lit.
      • 2a. If not, check the emergency switches.
      • 2b. The cable limitation switches at the bottom of the north pillar should be set to 'I' (Fig. 3).
      • 2c. If it is in '0' position, check collision of the telescope to the pillar (very unlikely event). In case of collision, do not touch anything, call help immediately.
      • 2d. If no collision, switch the blue lever back to 'I' position. Now the bottom-left controls of the RCC control panel should really be lit.
    • 3. The blue control lamp in the top-left of the central key panel ('Vezérlés be - ki') is lit, indicating the error.
    • 4. First acknowledge the error by pushing the bottom-left button ('Hiba nyugta').
    • 5. Now pressing the 'Vezérlés be - ki' button together with the alpha/delta +/- buttons, the telescope can be moved slowly.
    • 6. Take into account that if the telescope is in west position (telescope towards the control panel, counter weight on the other side), the meaning of the +/- buttons is reversed.
    • 7. When finished, do not forget to turn the key switch (Fig. 1, 'Kézi üzem') back to remote control position ('0'). Otherwise you are going to have another round to the dome in the night.
  • CRIO Troubleshooting: for the meaning of the error codes given by criorcc -l, consult this table: CRIORCC.
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