Module Indicator Lights are not lit when pool system is on.

This could mean there is no power to the ozone generator from the power source:

• Check circuit breaker at the power distribution box.
• Check for loose connections or wiring breaks from the power distribution box to the generator.
• The fuse in the unit has blown and needs to be replaced.
• The fuse is a replaceable glass, .25” x 1.25”, 1 amp, slo-blo type.

It could also mean the G.F.C.I. has been tripped. Check the power cord and reset the G.F.C.I.