Diagnostics and Troubleshooting - Controller CPU indicators
168 HC900 Process Controller Installation and User Guide Revision 19
06/14
Number
of Red
Possible Causes Lead and/or Reserve Controller
Action(s)
User Action Honeywell OI
Indication
HCDesigner/HC
Utilities Indication
6 High temperature
condition in a Scanner
2 rack has been
detected.
1. Associated AI blocks that are
configured as T/Cs set their fail pin
on, their warn pin off, and their
output pin to the failsafe value.
2. Associated AI blocks that are
configured as T/Cs set their IO
status to either:
“CJ High Temperature” if one of
the two CJs on an AI card is
indicating a temperature greater
than 70 degrees C
“CJ Failure” if both CJ sensors are
failing to convert.
3. Associated rack monitor block’s
module fail pin is turned on.
4. Associated rack monitor block’s
RACK OK pin is turned off.
5. Associated rack monitor block’s
HITEMP pin is turned on.
6. ASYS and FSYS blocks’ HITEMP
pins are turned on.
7. ASYS and FSYS blocks’ HW OK
pins are turned off.
6 Scanner 2 has a CPU
or Memory diagnostic.
1. Associated rack monitor block’s
RACK OK pin is turned off.
2. ASYS and FSYS blocks’ HW
OK pins are turned off.
See CPU or
MEMORY in the
associated rack’s
“Rack Diagnostics
Overview” display.
See CPU or
Memory in “Rack
Diagnostics”
dialog box.
7 A Scanner 2 rack has
a bad power supply.
1. Associated rack monitor block’s
RACK OK pin is turned off.
2. ASYS and FSYS blocks’ HW
OK pins are turned off.
Locate the Scanner 2 that indicates a
bad power-supply diagnostic, and
replace the defective supply.
See POWER
SUPPLY
DIAGNOSTICS in
the associated
rack’s “Rack
Diagnostics
Overview” display.
See Power
Supply
Diagnostics in
“Rack
Diagnostics”
dialog box.
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