Maintenance and Troubleshooting | 6-37
Types of Status Codes
There are Status Codes (SCodes) and Extended Status Codes (XSCodes)
for a wide variety of events. SCodes are used to inform the operator
which particular conditions gave rise to a Warning or Fault alarm. Simi-
larly, XSCode is obtained by summing the primary codes of any coexisting
conditions. Corrective action for all SCodes and XSCodes can be seen in
the troubleshooting charts.
The primary codes from which SCode and XSCode are derived are also
defined in the troubleshooting charts. If two or more conditions exist si-
multaneously the SCode is the sum of the primary codes of the coexisting
conditions.
While working from the User Interface, you can display the codes by
repeatedly pressing the ‘+’ button. Pressing ‘+’ displays each primary
SCode or XSCode on the User Interface (Stat\History : SCode or Stat\
History : XSCode). The primary code condition is displayed if the condi-
tion exists. If a given SCode or XSCode condition does not exist, “OK” is
displayed. The maximum values are “255” for SCode and “4095” XSCode.
Interpreting Status Codes and Extended Status Codes
To resolve SCode into its constituent primary codes, subtract the largest
possible primary code (as seen in the “Status Code” troubleshooting chart)
from the displayed code (which is the total sum of all primary SCodes
found) and then subtract the next largest possible primary code, etc., until
the remaining value is the smallest possible primary SCode. At each step,
the primary code being subtracted must not be larger than the remaining
value.
Example 1:
The displayed SCode is “13” and XSCode is “2”. This is resolved as fol-
lows:
13 Total sum of all primary SCodes found
- 8 w Check XSCode [Advice: Review-Extended-Status-Code]
5 Remaining sum of all primary SCodes found
- 4 w No HC DP [Hydrocarbon-Dewpoint-Temperature-Not-Found]
1 w TimeOut [Stage-Time-Out]
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