I talked with my manufacture about your damaged UV-Modules. We dont understand why this happen.
The modules are tested and with the previous modules we had no problems.
You forget to tell me the switch points of the flow meters. ( How many liters is the contact close point and how many liters is the contact open point) Pleas ask your maintenances.
They can measure it at the backside of the Flow meters.
(remove the black plug and measure between the contacts. The water flow they can control with the valve)
Also let them check the module exhaust. ( the exhaust hose from exhaust fan unit 1 must connected to unit 1. It can be possible
the company who move the press make a mistake.)
I recommend to do this for all units, to be sure that the waterflow and exhaust are correct.
Please sent me the result of your investigation.