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crwdns2944351:0crwdnd2944351:0Repair Gtech Hand-held Vacuum Cleaner ATF036 Mk2 Techniquecrwdnd2944351:0crwdne2944351:0

crwdns2933797:0Dave Empsoncrwdnd2933797:0crwdne2933797:0

crwdns2936043:0crwdne2936043:0 crwdns2933505:0crwdne2933505:0 Dave Empson

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Gtech Hand-held Vacuum Cleaner ATF036 Mk2
Type
technique
Title
Gtech Hand-held Vacuum Cleaner ATF036 Mk2 Technique
Introduction
The Gtech Multi 22V 400W ATF036 Mk2 vacuum cleaner was about 5 year old and was in good visual condition but failed to turn on. The power lead to the battery pack failed to show any LED illumination even though the charger was giving a satisfactory 27v when tested with a multimeter.
Simple disassembly of the battery pack (113a1003) showed all 6 Li ion cells (18650's) were in good physical condition but discharged to about 0.8v instead of a nominal 3.7V. This was due to a poor connection to the charger and too low a voltage for the safety circuits of the BMS (battery management system).
The six cells were all marginally recharged by holding another Li ion cell against them for a few seconds to bring them up to 3v. Attaching the charger again (with cleaned contacts) allowed the battery pack to charge correctly. Throughout the 4 hour re-charge, the cells were inspected for temperature (using a thermal camera in my case).
Caution: If any cells get warm (mine were at 22C), stop immediately due to fire risk. Other safety warnings for this procedure can be found online.
Time Required Min
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Time Required Max
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Imageid
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Difficulty
Moderate
Conclusion
To reassemble your device, follow these instructions in reverse order.
Author
Dave Empson
Public
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  • Multimeter x1 added.
  • standard torx 10 x1 added.
  • Infrared Thermal Imager x1 added.
  • All Power Hour Meter CFA6500CXE85 x1 added.

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  • Li-ion Battery ICR18650 3.7 V or similar x1 these can be found inside discarded e-cigarettes! added.

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  • Community-Contributed Guide added.

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