LPL — Leybold Pressure Low alarm — helium compressor low pressure on the Oxford 2195 cooler cabinet
Philips CT error code, reported by the Oxford 2195 Cooler Cabinet (MRI gradient/primary water cooling).
What LPL means
On Eclipse 1.5T and Polaris and Apollo CT systems, status code LPL indicates: Leybold Pressure Low alarm — helium compressor low pressure on the Oxford 2195 cooler cabinet. The code originates in the Water Cooling System (Oxford 2195 Cooler Cabinet) section of the Oxford 2195 Cooler Cabinet (MRI gradient/primary water cooling). Severity level alarm-high (Alarm (high) — cryocooler compressor fault).
Reported action: Leybold Pressure Low reports a low-pressure condition on the Leybold helium compressor (magnet cryocooler) fed from the 2195 cooler cabinet's power distribution. Check the compressor's helium supply/return pressure and acknowledge from the controller keypad once cleared. This document does not give Leybold-compressor-specific repair steps; consult Leybold compressor documentation for further diagnosis..
Shown as an alarm-status abbreviation on the Picker 3020 controller of the Oxford 2195 Cooler Cabinet, documented for the Philips/Picker Eclipse 1.5T MRI (and shared, per the same table, by Polaris and Apollo systems). Not confirmed by this document for other cooler models.
Full troubleshooting for LPL
The complete diagnosis, cause tree, and step-by-step remedy for the Water Cooling System (Oxford 2195 Cooler Cabinet) subsystem are documented in the FSELIB Activion16 (TSX-031A) service manual — re-authored, web-first, with real figures.
Open the Activion16 service manualRelated Water Cooling System (Oxford 2195 Cooler Cabinet) codes
Source: Philips/Picker Eclipse 1.5T MRI service documentation — Theory and Troubleshooting of Oxford 2195 Cooler Cabinet (Diagnostic Tools and Information, Maintenance). Reference information re-authored by FSELIB — not a copy of the OEM manual.