Specifications
Appendix B: Control Box Display Screens
Self
Test
Screen
Self Test Screen
-
-
Self
Test----
100%
A/D
=OK TC
=
OK OK
XFMR=OK HTR= OK OK
v:
--000000
00000000
The Selftest Screen appears when the Mode Button is pressed, after selecting option
4
(Perform Selftest) on the Other Functions Screen. This initiates a selftest.
-
The Selftest procedure is normally executed in the factory to verify the basic hardware
functions of the unit. The following results are displayed: 1)Success or failure of the
-
AD,
2)
success or failure of the two thermocouples,
A
and
B,
3)success or failure of
the transformer sensor,
4)
success or failure of the two heaters, A and B, and
5)
the
status of the 16 valves. While the selftest is in progress, a
%
indicator at the top of the
-
screen goes from
0
to 100
%
to show the progress of the test. When the test is complete,
the Selftest screen remains displayed until you press the Mode button. Results are
displayed as follows: For the AD, thermocouple, and transformer tests, either "OK",
-
"ERR", or
"??"
is displayed.
"??"
means that a test was not performed because a
prerequisite test failed. For example, if the
AD
fails, then the thermocouples,
transformer, and heaters will show
"??".
The two heater tests, like the AD,
-
thermocouple and transformer tests, will show "OK", "ERR", or
"??"
when the tests are
complete; however, while the tests are in progress, a temperature is displayed for each
heater. Valve status is shown by two 8-character strings, which should be
"-
-
000000
00000000"
if
all is well. Each character represents one valve.
'-'
means that the valve functions properly.
'0'
means it is open. 'S' means there is a short.
In the current Quest, only two of the
16
valves are actually used. That is why the selftest
normally show two
'-'
characters, followed by '0's.
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