Wow... Close one.
Got home tonight. Was getting ready to feed my fish and gave everything the usual once over. Noticed that my SMS122 PH controller was in an off state (PH was 6.1 and was set at 6.4). But yet, my bubbler was still going. Unplugged the solenoid plug and PH controller plug and it still was going. Plugged all back in, PH controller still in off state, still bubbling. Moved controller dial to 6.0 and it flashed alert (on state), turned it off (turned dial back to 6.4) and heard the solenoid click off and bubbles stop.
Had I not looked, this would have continued all through the night. My thought is that the solenoid was stuck in an on position. Checking my tank gauges, I read 700lbs on the tank pressure side and (embarassed to say I think) 100lbs on the output side. Could this high pressure on the solenoid side caused the stuck open state?
Note that I have had this running for two weeks and it tested fine and ran fan the whole time. The output (high side?) pressure has not changed.
I did lower the output side to 25lbs now... Is that okay?
Thoughts?
Ted
Got home tonight. Was getting ready to feed my fish and gave everything the usual once over. Noticed that my SMS122 PH controller was in an off state (PH was 6.1 and was set at 6.4). But yet, my bubbler was still going. Unplugged the solenoid plug and PH controller plug and it still was going. Plugged all back in, PH controller still in off state, still bubbling. Moved controller dial to 6.0 and it flashed alert (on state), turned it off (turned dial back to 6.4) and heard the solenoid click off and bubbles stop.
Had I not looked, this would have continued all through the night. My thought is that the solenoid was stuck in an on position. Checking my tank gauges, I read 700lbs on the tank pressure side and (embarassed to say I think) 100lbs on the output side. Could this high pressure on the solenoid side caused the stuck open state?
Note that I have had this running for two weeks and it tested fine and ran fan the whole time. The output (high side?) pressure has not changed.
I did lower the output side to 25lbs now... Is that okay?
Thoughts?
Ted