Honeywell HC900 Installation And User Manual page 180

Diagnostics and Troubleshooting - Controller CPU indicators
Number Possible Causes
of Red
Strobes
6 High temperature
condition in a Scanner
2 rack has been
detected.
6 Scanner 2 has a CPU
or Memory diagnostic.
7 A Scanner 2 rack has
a bad power supply.
168
Lead and/or Reserve Controller
Action(s)
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.
1. Associated rack monitor block's
RACK OK pin is turned off.
2. ASYS and FSYS blocks' HW
OK pins are turned off.
1. Associated rack monitor block's
RACK OK pin is turned off.
2. ASYS and FSYS blocks' HW
OK pins are turned off.
HC900 Process Controller Installation and User Guide
User Action
Locate the Scanner 2 that indicates a
bad power-supply diagnostic, and
replace the defective supply.
Honeywell OI HCDesigner/HC
Indication Utilities Indication
See CPU or See CPU or
MEMORY in the Memory in "Rack
associated rack's Diagnostics"
"Rack Diagnostics dialog box.
Overview" display.
See POWER See Power
SUPPLY Supply
DIAGNOSTICS in Diagnostics in
the associated "Rack
rack's "Rack Diagnostics"
Diagnostics dialog box.
Overview" display.
Revision 19
06/14