potential power supply failure [PDF 123KB]
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1. continue to be carried out These procedures include those necessary to ensure that CodeMaster batteries are kept fully charged and maintained 11 The Hewlett Packard Healthcare Response Centre should be contacted at the address given under Enquiries to arrange for replacement of power supply assemblies ENQUIRIES Enquiries to the manufacturer and requests for replacement power supply assemblies should be addressed to Mr Brian Wood Hewlett Packard Ltd Cain Road Bracknell Berks RG12 1HN Tel 01344 366333 HP Healthcare Response Centre Fax 01344 361607 SCOTTISH HEALTHCARE SUPPLIES Gyle Square Edinburgh EH12 9EB A Division of the National Service Scotland for NHSScotland CONTACT EMAIL iric shs csa scot nhs uk FAx 0131 314 0722 N WORD HAZ PUBLIC LIBRARY HAZ 1999 HAZ PHAZ9903 DOC WEBSITE http www nhsscotland com shs hazards_safety adverse_p html2. HAZARD NOTICE By arrangement with the NHS in Scotland Management Executive HAZ HEWLETT PACKARD CODEMASTER XL XL AND XE 18 R H DEFIBRILLATOR MONITORS Medical Devices POTENTIAL POWER SUPPLY FAILURE Page 1 of 2 Pages SUMMARY Some Hewlett Packard CodeMaster XL M1722A B XL M1723A B defibrillator monitors and CodeMaster XE M1724A defibrillators manufactured prior to 16 June 1999 may suffer failure of the power supply Routine operational and preventative maintenance checks should be carried out to identify faults BACKGROUND 1 Reports have been received from users and from Hewlett Packard regarding failures of the low voltage power supply in CodeMaster XL M1722A B and XL M1723A B defibrillator monitors Most failures have been detected during daily shift operational checks and routine preventative maintenance In one report the power supply failed while monitoring a patient during the night resulting in a LOW BATTERY alarm 2 Early stages of the failure mode can be identified by the AC POWER and BATT CHRG indicators taking several seconds to come on when the unit is first connected to the mains power 3 Imminent complete failure of the power supply can be identified while the defibrillator is in use or during required operational checks Failure is indicated when the AC POWER and BATT CHRG indicators do not light when the defibrillator is connected to mains power 4 Once the po
3. and Management Executive HAZ HEWLETT PACKARD CODEMASTER XL XL AND XE 18 R H DEFIBRILLATOR MONITORS Medical Devices POTENTIAL POWER SUPPLY FAILURE Page 2 of 2 Pages 7 Staff should be made aware of the potential failure of the power supply in Hewlett Packard CodeMaster XL XL defibrillator monitors as well as CodeMaster XE M1724A defibrillators 8 The failure mode can be detected by carrying out the shift and daily Operational Checks stipulated by the manufacturer in their User s Guide It will also be detected during routine maintenance as specified in the Service Manual The defibrillator should be connected to the mains supply to verify the following failure symptoms a AC POWER and BATT CHRG indicators remain OFF or b AC POWER and BATT CHRG indicators remain OFF for several seconds and then turn ON slow start up 9 Ifany of the above symptoms are detected and the integrity of the power supply cord and mains supply is confirmed the defibrillator power supply is likely to be faulty The defibrillator should be removed from use if possible until a replacement power supply can be fitted If the defibrillator has to remain in use for monitoring purposes clinical staff should remain in close proximity in order to be able to receive audible and visual LOW BATTERY alarms 10 If failure symptoms are not present the required Operational Checks and routine preventative maintenance should
4. wer supply has failed the defibrillator can only operate using the battery s existing charge The battery will not be recharged The LOW BATTERY message and audible alarm should give the user sufficient time to take the defibrillator out of service 5 Hewlett Packard are implementing reliability improvements to the CodeMaster series power supply assembly M1722 69530 They have identified a capacitor in the mains start up circuit that may be adversely affected by higher ambient temperatures present when connected to the higher mains voltage typically found in the UK Over time a small number of these capacitors may fail resulting in the symptoms described above The latest version of the power supply has been fitted with a capacitor which is less sensitive to these higher temperatures Revised support parts were made available and new defibrillators fitted with the upgraded power supply since 16 June 1999 ACTION 6 This notice should be brought to the attention of all appropriate managers staff and users Medical Physics Risk Management Safety Officers Wards SCOTTISH HEALTHCARE SUPPLIES Gyle Square Edinburgh EH12 9EB A Division of the National Service Scotland for NHSScotland CONTACT EMAIL iric shs csa scot nhs uk FAx 0131 314 0722 N WORD HAZ PUBLIC LIBRARY HAZ 1999 HAZ PHAZ9903 DOC WEBSITE http www nhsscotland com shs hazards_safety adverse_p html HAZARD NOTICE By arrangement with the NHS in Scotl
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