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Electronic Theatre Controls Inc

SmartPack Fluctuating Power Phase Temperature

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Symptoms

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The information in this post is provided to assist in troubleshooting. Perform work at your own risk. ENSURE ANY POWER FROM DEVICES HAS BEEN DISCONNECTED BEFORE SERVICING ANY EQUIPMENT. If you do not feel comfortable performing the work, please contact us or your local service center. Be aware that ETC and its Affiliates are not responsible for any damage or injury caused by service of our products by anyone other than us or our authorized service providers, and such damage is excluded from the product’s warranty.
  • SmartPack loads are flickering
  • SmartPack power phase readout shows widely fluctuating numbers
  • SmartPack fan is ramping up and down more than usual

Explanation of Issue

Fluctuating temperatures for a power leg in a SmartPack often indicate an issue with the power cube (device that regulates the dimming) controlling circuits on that phase.

Solution

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When metering line voltage power, follow all precautions delineated in NFPA-70E to ensure  your safety.
  1. Meter incoming voltage to verify power is stable
  2. Order a replacement power cube for that phase. Click Here for information on replacing a power cube.
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