Either an electrical problem, or the compressor has tripped on a safety device. Check supply power. Check for errors on display. Check emergency stop is out. Check and reset the overload relay. If it's a new installation, check the phase sequence.
[pdf] In its fleet status report issued this week the company has said it is preparing the rig for cold stacking, meaning the rig will be idled, crew let go, and all the hatches welded, cutting the costs to a minimum.
[pdf] Precision is equipping its U.S. rig fleet with upgrades to handle the increasing demand for ERL wells, particularly in plays like the Permian Basin, Eagle Ford, and Haynesville. These investments include: Higher torque top drives for better drilling power.
[pdf] 
