He is'nt harassing you. Chances are since nobody has replied to this topic with any information regarding in 3 weeks there is nobody on here with that device. Your best bet would to be to contact the maker for support as they know more about the product than any of us. Alternativly you could check your instruction manual if it came with one.
Have you tried moving fans 1&2 to 3&4 and switching 3&4 to 1&2. Then checking if anything on the display changes? like slots 3&4 now showing RPM's. If it doesnt show the RPM's then it may be a setting on the device. After the swap if 1&2 show the RPM's than you know the RPM sensor is functioning.
If you cant figure it out you can also contact Cyberpower.
(Most of us overclockers and gamers dont use devices like that to monitor temps and fan speeds, we either use SpeedFan, CoreTemp, GPU-Z, Rivatuner, motherboard specific overclocking/ fan speed control software (which you motherboard probably has). I occasionally use Everest, but I never monitor my fan speeds and temperature zones as once I hit my stable overclock and did stress testing to monitor temps I know that I am all set.