sus keeps saying no device connected

RELATED FAQS

Question
Answer
When the SUS and HHD are used in the “Auto Update” mode, the audit info will be automatically gathered each time the SUS is successfully connected with a lock.
If your Von Duprin EL (solenoid) device pulls and releases quickly instead of holding the latch retracted, please check all of the items below.In most cases, one or more of these solutions will r...
Dynamic Channel Switching is a feature of the Schlage AD-series wireless access point modules. Dynamic Channel Switching (DCS) increases the robustness of the wireless RF communication in a noisy r...
  Here is a Technical Note on what Dynamic Channel Switching is, what it improves, how to set-up, and frequently asked DCS questions. DCS Tech Note here  
Setting Dynamic Channel Switching   1)     Connect and couple the SUS to the PIM400 you intend to change. See the SUS User Guide for details   2)     Under “PIM Properties” and the “Edit” tab is ...
The E201 message can be ignored and all normal SUS and lock functions will be maintained.  Click "OK " and continue. Update the Schlage Utility Software (SUS) to version 4.6.0 or highe...
Make sure the lock AA batteries are good. 4.8 VDC or higher.
When in its “Active state”, the mechanical key switch can prevent USB connection. Make sure the lock key cylinder and tailpiece are properly installed.
Make sure the mechanical triangles on the back of the outside escutcheon are aligned properly.  See the installation instructions at www.schlage.com/support Schlage Technical Support.&nbs...
If the Schlage Utility Software pops up a "E201 error", just ignore it, and tap "Device Options" or update your firmware. See 78451  
Make sure the HHD/SUS is set to USB communication by checking the small icon right of the "No Device Connected" message.  The symbol should be a USB symbol when working with USB enable product...
ALWAYS put the PIM400 in LINK mode first. On a PIM400-TD2 press the LINK1 Button for door one, and LINK2 button for door 2. With a PIM400-485 you must use the SUS/HHD to select which door to LINK.  
1. To put the AD400 in LINK mode, hold down the RTE (Lever or crash bar see below) and press the # key on the key board, or present a card to the reader.            Why press the # key? Because t...
2. AD400 requires a Request To Exit (RTX) signal to link - see the user guide instructions for the linking process.  For an AD400 to enter link mode, it must see the RTX (Request To Exit) switc...
   3. Check the AA battery level, if the AA batteries are below 4.7 volts the AD400 can fail to LINK.             Install fresh batteries, with a level of 6.0 volts or better.  
4. PIM400/AD400 COM400 plug could be damaged! The small pins in the Main PCB board connection for the RF COMM board can get bent during installation of the RF COM400 board. If the PINs are bent a...