Korean-made IC card type electronic lock PM640, lock defect inspection due to dead battery

"The locking/unlocking operation of the IC card type electronic lock is unstable"

We rushed to repair this property last time as well. It was an electronic lock whose manufacturer's name was unknown, and it malfunctioned because the circuit board was nearly submerged in water and had progressed to corrosion. As an emergency measure, a part of the board was cleaned and it was working, but I wonder if they had it replaced after that.

Well, this time you reported that you can't lock the door with your card key, but what is the situation?

Upon arrival, I was given a detailed explanation of the condition, and it appears that the motor is running quite unstable due to lack of torque. They said they didn't replace the battery because they didn't know anything about it. I have a Panasonic EVOLTA for confirmation, so I installed it and was able to confirm that it was working properly. In the end, it turned out to be unstable due to a dead battery. I was relieved for a simple reason.

Apparently the Kono IC card-type card-type electronic lock is made in Korea, but the manufacturer's name is unknown. The model number was only identified as PM640.