Reason:
1. whether the UV lamps are turned on,whether the water tank works normally
2. The lights on when printing first.but no lights during the printing process.there is something wrong with the cables.just change them,if the cables are ok,cold weather cause water tank not to supply water.
3. The filters inside the water tank break down.
Solution:
1. Turn on the UV lights or water water tank
2. Chang cables or pour antifreezing solution into the water tank
3. Expel water in the water tank fully. Disassemble filters and clean it.clean the inside of tank as well.