GFL — Gradient Flow Low alarm on the Oxford 2195 cooler cabinet
Philips CT error code, reported by the Oxford 2195 Cooler Cabinet (MRI gradient/primary water cooling).
What GFL means
On Eclipse 1.5T and Polaris and Apollo CT systems, status code GFL indicates: Gradient Flow Low alarm 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 (Alarm — operational cooling fault).
Reported action: Gradient Flow Low means flow in the secondary (gradient coil) circuit has dropped below the alarm threshold. Confirm the secondary circuit is filled with distilled water (or up to 50% distilled water/glycol by volume) and that gradient-circuit valves on the 2195 manifold are fully open, then acknowledge the alarm once flow is restored. This document does not give further diagnostic steps specific to this alarm..
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 GFL
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.