HonestReview
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Until Viofo Releases a Firmware Update / Fix: Here is the "Known Issue" and Steps you can take to Mitigate the Problem.
Issue: The A139 3 Channel suffers from a potential overheating issue. Those living in warmer / hotter climates, and/or parking in direct sunlight, may experience their camera shutting off due to reaching thermal max while parked (low bitrate parking mode). I've verified this is present on two different Viofo A139 3 Channel Cameras.
Problem: When the camera overheats during low bitrate parking mode, it shuts off unexpectedly during a file write. Corrupting the last files being written.
A. If Loop Record (1,3,5 minutes) is enabled, the Front + Rear + Interior Files will be corrupted for the last given loop file.
B. If Loop Record is DISABLED, the ENTIRE MEMORY CARD will be rendered corrupt
Recommendations:
1. Always Enable Loop Recording. It is "better" to have the last files corrupted than to lose all data on the Memory Card
2. Be aware that this is a potential issue with the A139's low bitrate parking mode if living in a hot climate. The Supercacitors are only rated for 65C (149F).
149F / 65C is about when this problem occurs (Give or take a Few C or Degrees Fahrenheit). A car sitting in the sun on a hot day begins to heat up quickly. Especially if you are live in a hot climate.
3. Try to avoid parking in direct sunlight (3 wire - low bitrate parking mode) if you live in a hot climate.
Unknown:
Viofo states they are trying to resolve the Corrupt File issue. At present, there is no solution or firmware fix.
Note: I presume the 65C is a supercapacictor limitation, but this is an assumption. I am not sure what strategies Viofo can employ, whether it be upping the Thermal Shutoff Temperature (if SuperCapacitors can handle more than 65C) or setting a lower threshold for the camera to shut off to allow properly exiting the last files being written.
Mitigation: Always Enable Loop Record to prevent corruption of Entire SD Card, if camera experiences overheating. Avoid parking in direct sun.
Issue: The A139 3 Channel suffers from a potential overheating issue. Those living in warmer / hotter climates, and/or parking in direct sunlight, may experience their camera shutting off due to reaching thermal max while parked (low bitrate parking mode). I've verified this is present on two different Viofo A139 3 Channel Cameras.
Problem: When the camera overheats during low bitrate parking mode, it shuts off unexpectedly during a file write. Corrupting the last files being written.
A. If Loop Record (1,3,5 minutes) is enabled, the Front + Rear + Interior Files will be corrupted for the last given loop file.
B. If Loop Record is DISABLED, the ENTIRE MEMORY CARD will be rendered corrupt
Recommendations:
1. Always Enable Loop Recording. It is "better" to have the last files corrupted than to lose all data on the Memory Card
2. Be aware that this is a potential issue with the A139's low bitrate parking mode if living in a hot climate. The Supercacitors are only rated for 65C (149F).
149F / 65C is about when this problem occurs (Give or take a Few C or Degrees Fahrenheit). A car sitting in the sun on a hot day begins to heat up quickly. Especially if you are live in a hot climate.
3. Try to avoid parking in direct sunlight (3 wire - low bitrate parking mode) if you live in a hot climate.
Unknown:
Viofo states they are trying to resolve the Corrupt File issue. At present, there is no solution or firmware fix.
Note: I presume the 65C is a supercapacictor limitation, but this is an assumption. I am not sure what strategies Viofo can employ, whether it be upping the Thermal Shutoff Temperature (if SuperCapacitors can handle more than 65C) or setting a lower threshold for the camera to shut off to allow properly exiting the last files being written.
Mitigation: Always Enable Loop Record to prevent corruption of Entire SD Card, if camera experiences overheating. Avoid parking in direct sun.
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