RL — Reservoir Low alarm — secondary circuit header tank level low on the Oxford 2195 cooler cabinet
Philips CT error code, reported by the Oxford 2195 Cooler Cabinet (MRI gradient/primary water cooling).
What RL means
On Eclipse 1.5T and Polaris and Apollo CT systems, status code RL indicates: Reservoir Low alarm — secondary circuit header tank level low 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-low (Alarm (low) — early coolant reservoir warning).
Reported action: Reservoir Low is the early-warning tier for the secondary circuit header tank level (below Reservoir Very Low). Top up with DISTILLED water only, or distilled water/glycol pre-mixed up to 50% by volume, via the filling cap at the rear of the cooler until the header tank level indicator lamp goes off; avoid overfilling..
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 RL
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.