Troubleshooting a Scroll Compressor

Hello Mimaami:
A little more information would be helpful such as make and model of the unit. Typically I would say your warning is a high-pressure or head pressure warning, either way the causes are generally the same.

The most likely suspect is insufficient heat being released from the system, restricted airflow at condenser coil, the condenser fan either not running, or running to slow etc.

If the machine has previously been running correctly you can assume the refrigerant charge is correct, if it's a new installation it may be overcharged with refrigerant, in either case there could be a physical restriction in the refrigerant piping that can cause high head pressure.

There are multiple other reasons for the warning such as a defective sensor, however this would be the general area to look.

Yeaaaahhh! Does makes a lot of sense to me definetetly. Good to check-up condenser loop to start with just in case. Smart guyyyysss! Cheeesseeennnn! You have the Tech, absolutetly......Nice Saturday 'OverTime Job' by the way. Where is a nice 'Burger King' around there? Lock and Tag that Puppy and any other ancillary related with it to be safe during check-out time my friends. And have some fun at same time while tackle it down. OOOOhhh! And give some time for that Oil Temp to come up before restart that Puppy back online. Where the heck I left my coffe cup around here now? Goooossshhh? And 'Callaghan...Calaghaaaann' 'where is Callaghan' ? 'We got him...' 'Re-Route him inmediatetly back to the Mechanical Room.....' UHHhhh Ooohh Ooohhhh! I'm Quite I'm Out! Vamooonoooss..Andaleee...

HP Troubleshooting,

MC

Regarding your Copeland ZR1 compressor. The compressor manufacturers controller would have given a blinking light indication, so I a ssume the "HP" comes from the system controller. I agree with the Roadrunner, that it probably stands for high pressure. Check the condenser air entering temperature and compare it to the condenser refrigerant temperature. If the difference is more than 16C (30F) then look for a refrigerant side problem. If the difference is less than this, then the refrigerant side should be OK. Check to see if the condenser fan(s) are cycling off either because of a control problem or because they are tripping on internal overload. Good luck. Intermittent problems are hard to solve.