No Devices working procedure - Not for new installs
This is for a sytem has been in operation already, not a new system.
***Note best to use diagnostyx to do these tests.
1. Use a test kit with a known GOOD keypad mux whatever. Plug the test kit into the wall for power, the green conn into the controller (replacing the existing) and the third end into the known good keypad.
2. If the keypad works with the test kit the problem is not in the communicator/controller if the keypad does not work then it may be in the communicator. If bad go to step 3, if good go to step 4
3 .If bad - power down the controller. Remove the RS485 board (lines up with the green connector). Replace with a KNOWN good 485 module. Make sure that all 6 pins on both ends of the module are plugged in. While it only goes in one way, it can be skewed so one pin can be out of socket.
4. If good - power down ALL remote devices including keypads, relay boards, muxes etc. After they are all powered down, count to 30, plug them all back in restoring power. Check the system to see if they are operating. If they are, try some codes - any code will work with DiagnostyX. If not go to step 5.
5. Remove power from ALL devices. Pick ONE. Power it up and see if it is responding. If it is, leave plugged in and go to the next one. If both respond, leave plugged in and go to the next one.
Notes:
A) Althought very very unlikely, it is possible for one device to be continually putting out a signal which would silence the others. So if you are unlucky enough to pick the bad one in the beginning of step 5, you may have to remove that one, and try the others too. Such would be the case if that one worked, but none of the others did.
B) Typically a power cycle would solve most problems.
C) Check the voltages at the device, while the device is running. It should be 18VDC +/- 10%. If very low likely one device is pulling down the supply or there is a short in the power lines, possibly water in conduit something like that which would be a weak short.
