ND1 tap/tempo not functioning

ND1 tap/tempo not functioning

ND1 tap/tempo switch stays solid RED in manual mode.  If I tap the the tempo it flashes red and delay works for approx. 15 secs, than it flashes very fast and then goes solid RED and the delay signal stops. The guitar signal keeps working, however, with no delay effect. 
Am I missing something? 
I assumed in manual mode the delay was using a delay as per the rotary dial indicators position.  While the Tap/tempo switch is solid RED i get no delay signal.

All videos I seen on youtube show the tap/tempo flashing

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Source: http://forum.tcelectronic.com