On this page
Asset Type
Manufacturer
Model
What This Guide Helps With
Cycle not draining, poor spray action, standing water, or alarms caused by flow restriction, blockage, or external pump-related issues.
Step-by-Step Troubleshooting
Ensure Patient Safety First
- Confirm no critical instruments are dependent on this unit.
- Ensure a backup reprocessing method is available.
- Why it matters: Incomplete cleaning or drainage compromises instrument safety and patient care.
Verify the Reported Issue
- Run a cycle and observe for standing water, lack of spray pressure, or pump-related alarms.
- Expected: Water not draining, weak/no spray, or abnormal noise.
- Why it matters: Confirms whether issue is drain-related, circulation-related, or both.
Check Chamber for Obstructions
- Inspect the bottom of the chamber for debris (instrument parts, wrappers, sediment).
- Expected: Clear sump area with no visible blockage.
- Why it matters: Debris is a common cause of restricted flow affecting both drain and circulation.
- If debris is found → remove and retest.
Inspect and Clean Drain Filter/Strainer
- Remove and inspect the drain filter or strainer for buildup.
- Expected: Filter clean and unobstructed.
- Why it matters: A clogged filter restricts water flow and can mimic pump failure.
- If clogged → clean thoroughly and retest.
Check Spray Arms for Blockage or Restricted Movement
- Ensure spray arms spin freely and no jets are clogged.
- Expected: Free rotation and clear spray holes.
- Why it matters: Poor circulation may be mistaken for pump failure.
- If blocked → clean and retest.
Verify Drain Hose and Facility Drain Path
- Inspect the drain hose for kinks, clogs, or improper routing.
- Check facility drain connection for backup or restriction.
- Expected: Unrestricted drainage path.
- Why it matters: External plumbing issues can prevent proper draining.
- If restriction found → correct and retest.
Listen for Pump Operation
- During drain and wash phases, listen for pump activation (humming, vibration).
- Expected: Audible pump operation during appropriate cycle stages.
- Why it matters: Helps differentiate between electrical/control issues vs mechanical blockage.
- If pump runs but no flow → likely blockage or impeller issue.
- If pump silent → possible power/control or internal failure.
Check for Airlocks or Improper Water Levels
- Ensure proper fill level and no trapped air in system (run another cycle if needed).
- Expected: Normal fill and consistent circulation.
- Why it matters: Improper water levels can affect pump priming and performance.
Inspect for External Leaks or Signs of Pump Strain
- Check underneath and around unit for leaks, unusual noise, or overheating smell.
- Expected: No leaks, normal operating sound.
- Why it matters: Mechanical failure signs indicate internal pump damage.
- If abnormal noise, heat, or leaks are present → remove from service.
If the Problem Persists
If all external causes (filters, obstructions, hoses, spray arms, and drainage path) have been ruled out, the issue is likely internal (pump motor, impeller, or control system).
The device should be:
- Removed from service
- Labeled Out of Service
- Sent for repair or bench evaluation
Knowing when to stop is proper troubleshooting.
Clinical Use Tip
Never troubleshoot a washer-disinfector actively needed for surgical instrument turnover. Ensure instruments are rerouted before taking the unit offline.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"Washer-disinfector not draining with standing water remaining after cycle."
Cause
What was observed during troubleshooting.
Example:
"Drain filter clogged with debris restricting water flow."
Resolution
What action was taken.
Example:
"Cleaned drain filter, verified proper drainage, and returned unit to service."
Helpful Details to Include (If Known)
- Presence of standing water after cycle
- Spray pressure observations
- Filter condition
- Drain hose inspection results
- Pump noise (present/absent)
- Any alarms or error codes
- Final operational status
Final Thought
Effective troubleshooting starts with simple, external causes like debris and flow restriction before assuming pump failure. Prioritizing patient safety, using a logical process, and documenting clearly ensures reliable outcomes and avoids unnecessary repairs.
That is successful troubleshooting.