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What This Guide Helps With
This guide assists Clinical Engineering in troubleshooting detergent dosing pump failures on Getinge GSS Series washer-disinfectors. Failures may present as alarms indicating “dosing pump error,” lack of detergent delivery, or improper cleaning results. The guide focuses on external and easily verifiable checks before assuming internal pump failure.
Step-by-Step Troubleshooting
Verify Device Power and Status
- Ensure the washer-disinfector is powered on and not in a fault state.
- Check the main display for any active alarms.
- Why: The dosing pump may not operate if the unit detects other faults.
Check Detergent Supply
- Confirm the detergent container is present, filled, and properly seated.
- Inspect tubing for kinks, blockages, or disconnections.
- Why: An empty container or blocked line can trigger a pump error.
Inspect Pump Connections and Electrical Supply
- Verify that the dosing pump is securely connected to the washer-disinfector.
- Check for loose connectors, damaged wires, or tripped circuit breakers.
- Why: Electrical issues prevent the pump from operating.
Run a Manual Pump Test (if available)
- Some models allow manual activation of the dosing pump via the control panel.
- Observe if detergent is delivered properly.
- Why: Confirms pump functionality independently of a full cycle.
Check for Alarm History or Error Codes
- Review the system log for any specific dosing pump errors or codes.
- Reference the manufacturer’s error guide for code interpretation.
- Why: Identifies if the issue is recurring or intermittent.
Inspect Pump Mechanically
- Without disassembly, check for obvious external damage, leaks, or unusual resistance when turning the pump shaft by hand (if safe).
- Why: Mechanical blockage or external damage can prevent operation.
If the Problem Persists
Common external causes have been ruled out. The issue is likely internal to the dosing pump (motor, impeller, or internal electronics).
- Remove the washer-disinfector from service.
- Label it Out of Service.
- Send for repair or bench evaluation.
Reminder: Stopping troubleshooting at this stage is proper Clinical Engineering practice to ensure safety and avoid further damage.
Clinical Use Tip
Do not attempt to run cleaning cycles without detergent delivery; patient safety and infection control may be compromised. Move instruments to another operational washer-disinfector if possible before further testing.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
“Detergent dosing pump failed; alarm displayed during cycle, no detergent delivered.”
Cause
What was observed during troubleshooting.
Example:
“Pump tubing and container were intact, electrical connections verified, pump does not actuate manually; internal pump failure suspected.”
Resolution
What action was taken.
Example:
“Washer-disinfector labeled Out of Service and sent for bench repair. Alternate washer used for patient instrument cleaning.”
Helpful Details to Include
- Detergent container level
- Tubing and connector condition
- Error codes or alarm messages
- Observation of pump during manual test
- Final device status
Final Thought
Proper troubleshooting prioritizes safety, systematic logic, and knowing when to escalate. Documenting each step using CCR ensures clear communication and supports cost-effective maintenance while protecting patient care.
That is successful troubleshooting.