PC Board turned on heater without water flow which requires replacing the
PC board, or
Not enough water is moving over the element which is a flow problem, many
times due to dirty filters, or
Failed sensor
Flashing More On then Off:
Meaning: PC Board sees a sensor failure. Isolate which sensor and replace. Also
may occur if PC Board has failed.
Summary of Contents for Z Builder Series
Page 43: ...balanced and not using too much or too little chemicals...
Page 76: ......