rude
05-01-2015, 11:39 AM
Hey Guys
Need a little help with this unit.
When I first looked at the unit the circuit breaker was tripped and would keep tripping even with no power on in the house.
So I replaced the circuit breaker.
After restarting the unit and put the unit on cooling the condenser fan starts, then compressor begins to ramp and unit starts drawing 1.5amps and then bang the circuit breaker trips.
It is a 3 phase unit incoming voltage is 240, 234, 234
I have measured the resistance on the compressor between each lug and i am getting 1.3ohms
I even megger tested the compressor to earth it is open.
The compressor felt quite hot I couldnt hold my hand on it otherwise it would have burnt me. I tried cooling it down but it didnt really make much difference and it still tripped.
This is where I am a bit stuck.
It sounds like the compressor starts to ramp and then after about 10secs it trips the breaker without high current or being down to earth.
The unit was apparently running fine all day and then tripped when we hit over 40c
My usual experiance with these is the board would usually fault and the unit wouldnt trip?
Anything else I need to check? Unit is approx 6 years old
Thanks
Need a little help with this unit.
When I first looked at the unit the circuit breaker was tripped and would keep tripping even with no power on in the house.
So I replaced the circuit breaker.
After restarting the unit and put the unit on cooling the condenser fan starts, then compressor begins to ramp and unit starts drawing 1.5amps and then bang the circuit breaker trips.
It is a 3 phase unit incoming voltage is 240, 234, 234
I have measured the resistance on the compressor between each lug and i am getting 1.3ohms
I even megger tested the compressor to earth it is open.
The compressor felt quite hot I couldnt hold my hand on it otherwise it would have burnt me. I tried cooling it down but it didnt really make much difference and it still tripped.
This is where I am a bit stuck.
It sounds like the compressor starts to ramp and then after about 10secs it trips the breaker without high current or being down to earth.
The unit was apparently running fine all day and then tripped when we hit over 40c
My usual experiance with these is the board would usually fault and the unit wouldnt trip?
Anything else I need to check? Unit is approx 6 years old
Thanks