Hello from the UK,
I have came across a problem on two turbocor compressors, TT300 where the IGV does not open and therefore the compressors do not load.
I have followed the troubleshooting guide, and this would indicate a serial driver fault as all backplane voltages are correct etc. The leds for Igv do not flicker when a command for IGV open or close.
However, on power up the backplane leds for cool solenoids and the run led light, also the alarm led starts and stays green. The compressor still appears to go through a precheck and does not alarm and is still capable of operation, monitor programme still ok.
A third compressor on site operates ok, and on power up the alarm led lights red, precheck takes place and then alarm reverts to green and igv motors shut with igv leds flickering.
I have swapped serial cards and found that the fault remains the same and that the working compressor still works as before, therefore not the serial driver at fault.
Has anyone any ideas?
Your advice would be greatly appreciated.