Hello. I have a problem with an Atlas Copco ZT22 Compressor. The unit operates normally until it is switched into the loading mode.
At that time the intercooler pressure jumps from 30 to 59 psi and the low pressure safety valve starts to pop off.
The compressor continues to run and it does build up pressure but the low pressure pop off continually blows off. The low pressure safety valve was recently replaced and the operation returned to normal for a few days then the error repeated. There are no alarms displayed on the operation screen and all the other monitored sensors seem to be within normal range, ie, temperatures, oil pressure, etc.
The load/unloader module appears to operate correctly and unloads when the set pressure is achieved. I suspect there is a problem with the High-pressure compressor element? Any feedback you could provide would be greatly appreciated!