Good evening all. I'm new to the forums and dont claim to know much on the actual circuitry side of circuit boards. I'm on the HVAC/control side and deal with them on a daily basis. I have run into an issue that I'm hoping someone on here can assist me with.
I have 6 large rooftop air conditioning units that are having random lockups due to what now I'm thinking to be power issues at the site. Losses/spikes of less than half a second. I have a communication board in this unit that basically freezes up and once power is removed and reconnected all is good. Until next time that is...
The board is being fed from a 115VAC to 12/5 vdc transformer. The 12VDC feeds main board and 5vdc feeds the board in question. The machine has a phase monitor with a normally open set of contacts but only inputs as a status point on main board. Does not kill power to either board. Was thinking about installing a timing relay to kill 5vdc in case of phase issue but I'm afraid that the loss/spikes are less than the minimum of 2 seconds response time of the monitor. Any ideas a way to protect the 5vdc from any power glitches coming into it and make sure it stays clean with no losses/spikes? Thanks in advance..
I have 6 large rooftop air conditioning units that are having random lockups due to what now I'm thinking to be power issues at the site. Losses/spikes of less than half a second. I have a communication board in this unit that basically freezes up and once power is removed and reconnected all is good. Until next time that is...
The board is being fed from a 115VAC to 12/5 vdc transformer. The 12VDC feeds main board and 5vdc feeds the board in question. The machine has a phase monitor with a normally open set of contacts but only inputs as a status point on main board. Does not kill power to either board. Was thinking about installing a timing relay to kill 5vdc in case of phase issue but I'm afraid that the loss/spikes are less than the minimum of 2 seconds response time of the monitor. Any ideas a way to protect the 5vdc from any power glitches coming into it and make sure it stays clean with no losses/spikes? Thanks in advance..