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What This Guide Helps With
Troubleshoots absent, slow, excessive, or inconsistent chamber filling caused by water supply, loading, drainage, or other external conditions.
Step-by-Step Troubleshooting
1. Protect Processing and Confirm the Fill Problem
Do not use the washer for instrument processing when chamber filling is unreliable. Identify whether the chamber:
- Does not fill
- Fills slowly
- Appears underfilled
- Appears overfilled
- Produces inconsistent water levels between cycles
Record the cycle and phase where the condition occurs.
Expected outcome: The exact fill complaint is confirmed. If the observation was related to normal cycle behavior and a complete verified cycle operates normally, troubleshooting can stop.
2. Verify Normal Power and Cycle Initiation
Confirm the washer remains powered and is actually progressing into a fill phase rather than being held by another condition such as an open door or incomplete rack connection.
Expected outcome: The unit is stable and is commanding normal cycle progression. If correcting an external start condition restores filling, verify the cycle and stop.
3. Verify Facility Water Availability
Check accessible incoming water services for:
- Closed isolation valves
- Facility water interruption
- Obvious supply leakage
- Recent plumbing work
- Abnormally low water availability elsewhere in the department
Coordinate with Facilities if supply pressure or infrastructure is suspected.
Expected outcome: Required facility water supplies are available. If an external supply condition is corrected and normal fill is restored, complete a verification cycle and stop.
4. Inspect Accessible Supply Connections
Inspect visible hoses, fittings, strainers or accessible connection areas without disassembly for kinks, crushing, leakage, or obstruction.
Do not open pressurized plumbing or internal valves unless qualified and authorized.
Expected outcome: External supply connections are intact and unobstructed. Correcting a visible external restriction should restore normal filling.
5. Check the Chamber and Load
Inspect the chamber for misplaced items, packaging, containers, or debris that could interfere with visible level sensing areas, drains, or water distribution.
Verify the rack and load are correctly positioned.
Expected outcome: Nothing in the chamber or load is interfering with normal filling or drainage. If removing an obstruction corrects the water level, verify operation and stop.
6. Check for Simultaneous Drainage
Observe whether incoming water appears to leave the chamber unusually quickly. A drain condition can appear to be a fill problem.
Inspect accessible drain areas for obvious blockage or abnormal flow.
Expected outcome: The chamber retains water appropriately during the required portion of the cycle. If a simple accessible drain obstruction caused the symptom and is safely corrected, verify the cycle and stop.
7. Compare Repeated Cycle Behavior
Run an approved verification cycle and determine whether the fill problem occurs:
- Every cycle
- Only after a previous cycle
- Only with one rack or load configuration
- Intermittently
Expected outcome: The failure pattern is defined. If repeated cycles fill consistently after correcting an external cause, troubleshooting is complete.
8. Perform Final Functional Verification
Confirm the chamber fills and drains normally throughout the verification cycle without leakage, overfill, or interruption.
Expected outcome: Normal cycle progression is restored and the washer completes its required verification. The unit may be returned to service only after successful testing.
9. Escalate Unresolved Fill Problems
If water supply, visible connections, loading, and drainage conditions are normal but fill remains incorrect, stop external troubleshooting.
Expected outcome: The washer is removed from service for qualified evaluation.
If the Problem Persists
The remaining issue may involve internal water-level sensing, valves, plumbing, controls, utility regulation, or other service-level components.
The washer should be:
- Removed from service
- Labeled Out of Service
- Sent for repair or bench/service evaluation
- Evaluated using appropriate STERIS documentation and approved test equipment
- Repaired or configured only by qualified personnel
Return-to-service testing must demonstrate correct filling, draining, cycle progression, and absence of leaks. Knowing when to stop external troubleshooting is proper troubleshooting.
Clinical Use Tip
Do not process instruments in a washer with unreliable chamber water levels because cleaning performance cannot be assumed.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"Sterile Processing reported the Reliance 444 chamber was not filling adequately during the wash cycle."
Cause
What was observed during troubleshooting.
Example:
"Clinical Engineering found the facility water isolation valve supplying the washer was partially closed."
Resolution
What action was taken.
Example:
"Facilities restored the valve to its proper position, and Clinical Engineering verified normal chamber filling and a complete successful cycle."
Helpful Details to Include (If Known)
- Whether fill was absent, slow, low, or excessive
- Cycle and phase affected
- Facility water status
- Visible valve position
- Supply connection condition
- Drain behavior
- Rack and load configuration
- Leakage observed
- Verification cycle results
- Final device status
Final Thought
Verify the water supply, visible plumbing, chamber condition, loading, and drainage before assuming an internal water-control problem. Remove the washer from service when water level cannot be reliably verified and document the completed troubleshooting clearly.
That is successful troubleshooting.