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Asset Type
Sequential Compression Device (SCD)
Manufacturer
Model
What This Guide Helps With
This guide provides a structured Clinical Engineering approach when a Kendall SCD 700 Series will not power on.
This may present as:
- No lights illuminated
- No display activity
- No audible tones
- Unit completely unresponsive
The focus is on logical, external, and easily verifiable checks before assuming internal failure.
Step-by-Step Troubleshooting
Confirm the AC Power Source
- Verify the unit is plugged into a known live hospital-grade outlet.
- Test the outlet using a known-good device.
- If plugged into a power strip, bypass it and plug directly into the wall.
Power source issues are the most common cause of a no-power complaint.
Verify Power Cord Integrity
- Inspect the entire length of the power cord:
- No cuts, frays, or crushed sections
- No exposed wiring
- Strain relief intact at both ends
- Ensure the cord is fully seated at the device inlet.
- If damage is found, remove from service immediately. Do not attempt temporary fixes.
Check the Power Switch
- Place the power switch firmly in the ON position.
- Observe for:
- Any LED illumination
- Audible click or startup tone
- Momentary light flicker
- A worn switch may mechanically move but fail electrically.
Test with a Known-Good Outlet
- Even if the first outlet tested good, relocate the device to a second verified outlet.
- This eliminates:
- Intermittent outlet failure
- Tripped upstream breaker
- Faulty wall plate wiring
If Equipped with Battery – Verify Battery Status
- Some SCD 700 units may include battery capability.
- If applicable:
- Confirm battery is properly seated
- Attempt power-up on battery alone
- Swap with a known-good battery if available
- A failed battery can sometimes prevent startup.
Observe for Any Partial Signs of Life
- Attempt to power the unit while observing closely for:
- Brief LED flash
- Faint beeping
- Relay clicking
- Burning smell
- Excess heat
- Document exactly what occurs. Even brief activity provides useful diagnostic information.
Do Not Open the Unit in Clinical Areas
- Do not access internal fuses or service panels in patient care areas.
- If internal fuse or PCB failure is suspected:
- Stop troubleshooting
- Escalate to bench evaluation
- Internal access should only occur in a controlled CE environment.
If the Problem Persists
- If the device remains completely unresponsive after:
- Verifying power source
- Inspecting cord
- Testing alternate outlet
- Checking switch function
- Evaluating battery (if applicable)
- The issue is likely internal (power supply board, internal fuse, PCB failure).
- At this point:
- Remove the device from service
- Clearly label it Out of Service
- Send for Clinical Engineering bench evaluation
- Knowing when to stop is proper troubleshooting.
Clinical Use Tip
- Do not troubleshoot on an active patient.
- If the unit fails during therapy:
- Transfer the patient to a functioning SCD unit first
- Ensure DVT prophylaxis is maintained
- Then remove the failed device from service
- Patient therapy always takes priority over equipment evaluation.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
“Kendall SCD 700 will not power on. No display or indicator lights.”
Cause
What was observed during troubleshooting.
Example:
“Verified hospital-grade outlet functional. Tested alternate outlet. Power cord intact. Power switch engaged with no response. No LED activity. Suspect internal power supply or fuse failure.”
Resolution
What action was taken.
Example:
“Removed from service. Labeled Out of Service. Sent to CE shop for bench evaluation.”
“Unit tagged and routed for internal power supply inspection.”
Helpful Details to Include (If Known)
- Outlet tested (yes/no)
- Alternate outlet tested
- Battery tested or swapped
- Power switch behavior
- Indicator light behavior
- Any audible clicks or tones
- Any smell or heat noted
- Final device status
Final Thought
Power failures require disciplined troubleshooting. By ruling out simple external causes first, you protect patient safety, prevent unnecessary part replacement, and ensure accurate documentation. Escalating at the correct point is not a failure — it is sound Clinical Engineering judgment.
That is successful troubleshooting.