I purchased a house with an inground salt water pool (1st time maintaining a pool). It came with a Aqualink RS4 control system. This system appears to be old. The previous owner left all the instruction manuals and I read everything. The issue I'm having is the freeze protection activates when very cold at night and the pump would start and stop rapidly like almost 20-30 times a minute. This pulsation of the pump varies (few seconds at a turn) and there's no rhyme or reason. Per the manual, there is no way to deactivate the freeze protection mode on the pump so what I do is just turn off the whole system (there's a switch at the equipment outside like a normal light switch) and turn it back on in the morning. I already replaced the relay with a new relay for the pump thinking the relay is not "sticking"/staying on because of the cold temp but no luck and the pump continues to "pulse" on and off when freeze protection is activated. Does anyone know what's going on? Any help with be much appreciated.
Pool Info if helps:
Approx 30,000 gallon pool
Polaris AutoClear ACL-14 SWG system
Hayward pump model RS2000 (2 HP, 2.5 THP, 1.25 SF, all listed on the pump)
Sta-Rite System 3 S8M150