In Krasnoyarsk, passengers of new gas-powered MAZ 203.047 buses are suffocating in the cabins due to forcibly disabled cooling systems. As journalists from NGS24.RU found out, drivers are massively deactivating climate control, citing direct demands from citizens to open windows.
The standard air conditioner of the low-floor bus produces up to 20 kilowatts of cold – this is enough for a sealed metal volume, but with open ceiling hatches, the heavy cooled air physically flows out into the doorways, and solar radiation freely floods the cabin. The compressor goes into continuous cutoff when trying to cool the street and quickly overheats.
The climate system of the MAZ 203.047 is designed to operate exclusively in a closed circuit. Open windows and hatches instantly nullify the compressor's performance, and attempting to cool the cabin with a draft reduces the unit's lifespan.
A constructive solution to the problem is known: European and premium Chinese platforms are equipped with hatch position sensors that programmatically de-energize the compressor, and many Russian megacities have switched to completely sealed capsules without windows.
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