Sometimes the signal from the frequency divider was strange. We used two frequncy divider, No.1 is 2 times divider, No. 2 is 10 times. The seed pulses with 4 Hz repitation rate was divided to 0.2 Hz by these frequncy dividers. I found the No.1 sent disordered signals. After moved this divider from one rank to the another, the problem was disappeared. So I used the same DC power supply to energize these dividers now.
The Relay K4 for cooling fans could not run well, previously it became well after only tightening the connectors. Yesterday I had to tighten many times, I replaced it this morning.