Got a Daikin UAT30HY1 that i found tripped on oil pressure, CCH is ok.
Once reset you have to turn it off and on in the plant room and then walk back outside to see if it started ok. First time it had tripped before i got there, so i reset it but waited 30 minutes as i worked on another system just incase there was any heat still in the bimetalic trip mechanism.
This time i timed it and it tripped again in under 30 seconds. You can see the system is building oil pressure as 'pointer' on the bellows starts to lift off its stop but not quite enough to drop the heater out of circuit in the 30 seconds or so.
I poked a screwdriver in to lift the pointer to the ok position and when i checked it at about a minute it would stay there.
I did not get to check the oil pressure :o as had four of the things with various faults and this one wasn't a priority.
Right finally to my question! How long should the oil diff switch wait before tripping? Thought they were 120 seconds but am not that familiar with them tbh:D
The systems and 20 ish years old on R22 and 4GS mineral oil. I doubt the oil has been changed since new.
Once reset you have to turn it off and on in the plant room and then walk back outside to see if it started ok. First time it had tripped before i got there, so i reset it but waited 30 minutes as i worked on another system just incase there was any heat still in the bimetalic trip mechanism.
This time i timed it and it tripped again in under 30 seconds. You can see the system is building oil pressure as 'pointer' on the bellows starts to lift off its stop but not quite enough to drop the heater out of circuit in the 30 seconds or so.
I poked a screwdriver in to lift the pointer to the ok position and when i checked it at about a minute it would stay there.
I did not get to check the oil pressure :o as had four of the things with various faults and this one wasn't a priority.
Right finally to my question! How long should the oil diff switch wait before tripping? Thought they were 120 seconds but am not that familiar with them tbh:D
The systems and 20 ish years old on R22 and 4GS mineral oil. I doubt the oil has been changed since new.