From the EMS-PT30X manual a 2 minute 16 second delay on set up is normal operation.
“Re-apply power to the AC power source and verify that there are still no error codes other than E 0 displayed. If no error codes are present the 2 minute 16 seconds (136 seconds) timer will be activated. During this time, the delay indicator located in the bottom right corner of the display will flash. Once the timer has expired, power will pass through the EMS unit to the RV. “
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