Specifications

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12.0 TROUBLE-SHOOTING, CONT’D…..
With the POWER ON
1) Check the voltage on the 24VDC line. A reading of anywhere between 24.0 VDC to 20.0VDC is acceptable. Anything below 20.0 VDC is
unacceptable.
2) Set the controller into 3323 mode
Check the voltage between the data-A line and COM. This should be roughly 2.5 volts. Check this voltage at both ends of the node. A reading
of anywhere between 2.0 VDC to 3.0VDC is acceptable.
Check the voltage between the data-B line and COM. This should be roughly 2.5 volts. Check this voltage at both ends of the node. A
reading of anywhere between 2.0 VDC to 3.0VDC is acceptable.
Hardware:
1) Check that all the link lights (amber) are “on” at the DSTs and all external circuit boards, with the system in normal operation
2) Check that the analog inputs are on channels 1 through 8. (if any are enabled)
3) Check that the external relays operate correctly.
a) Enter menu item 3132
b) Toggle each relay.
NOTE: Each external relay board adds 8 relays to the system so check that there are the correct number of relays indicated.
With the POWER ON
4) Insure that the DST’s are correctly associated with the correct channel number.
a) Enter the menu code 3323
b) Cycle through the analog channels (1 – 8) (if there are any)
c) Cycle to the first DST channel
d) Check the DST to ensure that the amber link light is illuminated for each channel
e) Either press the autocal button on the DST or enter 1221 then select the channel
number associated with each DST
f) Check that each DST is working correctly
g) Enter the menu item 3233
h) Scroll to the first DST in the list.
i) Flow some value of gas on to the DST
j) Check the value displayed on the screen