"At first we thought that there could be a micrometeorite hit, but then we found that the radiator was hit from the other side," Krikalev said during a news conference organized by NASA.
He added that after the depressurization, the refrigerant was completely gone from the cooling system.
On Thursday, a leak from the spacecraft’s cooling system occurred due to damage to the outer skin of the ship's instrument and assembly compartment.
The failure did not affect the living conditions of the crew, and there is no need for emergency evacuation. To maintain a comfortable temperature in the living space of the Soyuz MS-22, cooled air is supplied from the Russian segment of the ISS.
The Soyuz MS-23 reserve spacecraft which originally was scheduled to leave for the ISS on March 16, may be prepared for flight by February 19. However, Roscosmos hopes that the Soyuz MS-22 crew will return to Earth on their ship in the second half of March.