Honeywell HC900 Installation And User Manual page 136

Diagnostics and Troubleshooting - User Interface
Table 27 - Controller Module Diagnostics
OI Screen OI Screen
Item Item Value
MODULE 1 GOOD
through
MODULE 16
HI CJ
TEMPERAT
URE
WRONG
MODULE
126
Number of Possible Cause
LED
Strobes
N/A N/A
6 Possible causes of
this diagnostic are:
1. One of the two CJs
on the module is
indicating a
temperature reading
greater than 70
degrees C.
2. Both cold-junction
sensors are failing to
convert.
3. The CJs are
converting properly,
but their differential
is greater than 10
degrees C.
6 The module does not
agree with the module
required for the
control scenario.
HC900 Hybrid Controller Installation and User Guide
Control File Action
N/A
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 "CJ High
Temperature" for
reason 1 or "CJ Failure"
for possible causes 2
and 3.
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 block's HITEMP
pin is turned on.
7. ASYS block's HW OK
pin is turned off.
1. Associated blocks set
their fail pin on, their
warn pin off, and their
output pin to the
failsafe value.
2. Associated blocks set
their IO status to
"Channel No Comm".
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. ASYS block's HW OK
pin is turned off.
User Action
N/A
1. Improve ventilation
to rack
2. Replace AI module
1. Verify configuration
2. Replace module with
the correct one.
Revision 5
9/03