Make the initial response clear
Stop the affected task and follow the site’s instructions for the alarm or fault. If there is a release, exposure or immediate danger, use the laboratory’s emergency procedure. Keep others informed and prevent the equipment being used until the responsible person permits it.
The airflow alarm guide covers that specific indication. Avoid repeatedly resetting an alarm or altering controls to continue work.
Record the sequence
| Detail | Example of what to record |
|---|---|
| Equipment | Cupboard location, model and identification. |
| Indication | Exact displayed message or changed sound. |
| Timing | When it began and whether it recurs. |
| Operating state | Task, sash position and equipment in use. |
| Recent changes | Building work, new apparatus or service activity. |
Keep observation separate from repair
Record information from safe, normal access positions. Do not open electrical equipment, climb onto roofs or disturb contaminated ductwork to investigate a fault. Those activities need the appropriate personnel and controls.
A problem can involve the cupboard, fan, duct route or room air supply. Our make-up air guide explains one of the system interactions that may need assessment.
Prepare access for the service discussion
Identify the laboratory contact who can explain the fault and arrange access. Include the cupboard location, available service records and any access restrictions. Tell us about the chemicals or residues associated with the equipment so the responsible people can agree how the work area will be prepared.
Keep a record of any temporary arrangements and who is responsible for the equipment while it is out of use. Agree the scope of the visit before arranging access to fans or ductwork.
Agree the return-to-use process
Ask what repair, testing and documentation will be needed before work resumes. Record the identified cause and any changes made to the installation.
Use our maintenance checklist for ongoing care. If the assessment identifies a wider equipment issue, the repair or replace guide helps frame that next decision without treating every fault as a replacement project.