Honeywell 900 User Manual page 51

Controller Diagnostics
Item Status
MODULE ERROR
MODULE HI CJ
TEMP
FAILURE
NO COMM
Revision 9
May 2014
Possible Cause Controller Action
One of the module Select I/O from the menu
diagnostics in the to see details on the faulty
associated rack is set module. See I/O Module
to MISMATCH, BAD Diagnostics on page 42.
MODULE, BAD
CHANNEL., or
MISSING/NO COMM
(if the
communications is
failing due to the
module not
installed—could occur
if the module is
installed but CPU
can't communicate to
it).
One of the module Select I/O from the menu
diagnostics in the to see details on the faulty
associated rack is set module. See I/O Module
to HI CJ Diagnostics on page 42.
TEMPERATURE.
The Controller All associated module
module is unable to diagnostics are set to
successfully MISSING/NO COMM.
communicate to any
modules that are in its
See MISSING/NO COMM
SPI backplane.
in Table 22 I/O Module
Error Status on page 44 for
further details.
The Main CPU is See FAILURE.
unable to successfully
communicate to an
expansion rack that is
in its configuration.
900 Control Station User Guide
Main Menu
Diagnostics
What to do
Select I/O from the menu to see details
on the faulty module. See I/O Module
Diagnostics on page 42.
Select I/O from the menu to see details
on the faulty module. See I/O Module
Diagnostics on page 42.
1. Remove modules and check for bent
pins on connectors.
2. Reinsert modules one at a time and
note which module the diagnostic
reoccurs, and replace that module.
3. Cycle power to the rack.
4. Replace the power supply.
5. Replace the rack.
6. Replace the CPU board.
1. Verify that the expansion rack should
be in the configuration
2. Verify that the jumpers on the
scanner are setup for the correct rack
address.
3. Check that expansion rack is on.
4. Check the expansion rack's status
LED for diagnostic information.
5. Check that cable is connected to
expansion rack.
6. If a hub is used, check that all cables
are properly connected to the hub,
proper crossover cables are used, and
that hub is powered.
7. Cycle power to the rack.
8. Cycle power to the hub.
9. Replace the expansion rack's power
supply.
10. Replace the expansion rack.
11. Replace the expansion rack's
scanner board.
12. Replace the main CPU.
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