I replaced the broken fitting on the diode chiller today but it would not start due to a low flow error. The flow will reach a max of 2 lpm before shutting off after a few seconds. I short circuited the flow to the chiller and got the same error, so the issue is with the chiller itself. We'll likely need the spare chiller from the H2 room, but will have to flush it out as there is some algae in the water tank.