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What This Guide Helps With
This guide assists Clinical Engineering in troubleshooting spray arm blockages that trigger poor cleaning alarms on Getinge GSS Series washer-disinfectors. Blocked spray arms can prevent proper water distribution, resulting in alarms indicating incomplete cleaning or failed cycles. The focus is on external, easily verifiable issues and ensuring patient safety before considering repair.
Step-by-Step Troubleshooting
Check Cycle and Alarm Messages
- Review the alarm display and cycle log for “poor cleaning” or related messages. Confirm whether this occurs on a single cycle or multiple load types.
- Why: Confirms the issue is consistent and not a one-time anomaly.
Verify Detergent and Water Supply
- Ensure detergent is present and dosing correctly. Confirm incoming water supply pressure and temperature meet specifications.
- Why: Inadequate water or detergent can mimic spray arm blockages.
Inspect Spray Arms Visually
- Open the chamber and remove or lift spray arms. Check for obvious debris, hard water deposits, or kinks.
- Why: Blockages in spray nozzles are often visible and easy to remove.
Manually Clear Obstructions
- Remove visible debris using soft brushes or approved cleaning tools. Ensure spray arm rotation is free and unobstructed.
- Why: Freely moving spray arms are essential for uniform water coverage.
Check Spray Arm Rotation Mechanism
- Spin the arms by hand to confirm they rotate smoothly. Look for damaged or loose mounts that might hinder movement.
- Why: Even clean arms won’t distribute water effectively if they cannot rotate.
Run a Test Cycle
- Perform a rinse cycle without instruments and observe spray coverage. Verify alarms clear and water reaches all parts of the chamber.
- Why: Confirms that external cleaning steps resolved the blockage.
If the Problem Persists
Common external causes have been ruled out. The device should be:
- Removed from service
- Labeled Out of Service
- Sent for repair or bench evaluation
Clinical Engineering Note: Knowing when to stop prevents further damage and ensures patient safety.
Clinical Use Tip
Do not operate the washer-disinfector on patient instruments if spray coverage is impaired. Move patient loads to an alternate device while troubleshooting. Only perform tests with empty loads when verifying resolution.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
“Washer-disinfector alarms indicate poor cleaning; visual inspection shows inconsistent spray coverage.”
Cause
What was observed during troubleshooting.
Example:
“Spray arms partially blocked with debris and mineral deposits; rotation hindered.”
Resolution
What action was taken.
Example:
“Removed spray arms, cleared obstructions, verified rotation, and ran test cycle confirming proper coverage; alarms cleared.”
Helpful Details to Include
- Checked water inlet pressure and temperature
- Confirmed detergent presence and proper dosing
- Observed spray arm rotation after cleaning
- Documented any unusual noises or resistance during arm rotation
- Final device status: operational with proper spray coverage
Final Thought
Proper troubleshooting emphasizes safety, methodical inspection, and escalation when needed. Documenting each step ensures future reference and reduces risk of patient exposure to improperly cleaned instruments. Even simple issues like spray arm blockages can cause alarms; following a logical workflow prevents unnecessary downtime and repairs.
That is successful troubleshooting.