Hello

5 flashes is "I High At Stand".

This problem occurs on most Zapi units but mostly on B1 and H2's.

Basicaly, the pot calibration for the currect sensor (if i recall correctly on a sem2 its a bc487 transitor which is used) moves with time due to vibration and the fact Zapi have used cheap pots for years.

If you send to Zapi the fix will be new pots and adjusted again. If you would like to try yourself you need to adjust the pot(there are two pots, one is the currect limit and one is the gain) its the the gain pot you need to adjust, its the one furthest away from the front of the unit. Adjust it down until it starts to move back up in the opposite direction then move it 20 mV back up the faster rising side.
Should be clarified in the ZAPI controller type. What is your email address?
Best regards, Laci