For what it worth, I tested the Charger at 16A charging rate.
I completely discharged my 230Wh, 5S LTO Battery and then charged it from zero to full at 16A.
The average charge rate was about 195W.
The orange light stayed on from start to about 12.1V (2.42V per cell), then turned off.
The charger was 92% efficient from start to finish, regardless of the orange light state.
The temperature peaked at 105°C, the hottest part being the inductor, the grey box on the charger.
Unless I am missing something, I can confirm that the Fan doesn’t work, I even unplugged the fan and checked two pins with voltmeter to rule out bad Fan.
Conclusion:
The 16A/200W charging rate requires active cooling/fan, and possibly an additional heatsink, and even some baffling to direct hot air away from the battery cells.
I think that the more suitable maximum charging rate for this charger would be around 12A max/150-170W max, for 5S-6S LTO accordingly.