Honeywell Controller C70 CPU 900C70-0360-00
Item Status Possible Cause Controller Action What to do MODULE ERROR One of the module
diagnostics in the
associated rack is set
to MISMATCH, BAD
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 toit).
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.
MODULE HI CJ
TEMP
One of the module
diagnostics in the
associated rack is set
to HI CJ
TEMPERATURE.
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.
FAILURE The Controller
module is unable to
successfully
communicate to any
modules that are in its
SPI backplane.
All associated module
diagnostics are set to
MISSING/NO COMM.
See MISSING/NO COMM
in Table 22 I/O Module
Error Status on page 44 for
further details.
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.
NO COMM The Main CPU is
unable to successfully
communicate to an
expansion rack that is
in its configuration.
See FAILURE. 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.

Item Status Possible Cause Controller Action What to do
BAD VERSION The Main CPU
determined that its
software is not
compatible with the
scanner module.
All associated module
diagnostics are set to
MISSING/NO COMM.
Refer to MISSING/NO
COMM diagnostic for
further details.
1. Upgrade the scanner software either
by replacing the module or doing a
code-download.
2. Update Main CPU software either by
replacing the module or doing a code
download.
RTC Status GOOD N/A N/A N/A
NOT
PROGRAMMED
RTC not programmed 1. Time and date is set to
00:00:00, January 1, 1970.
2. Associated rack monitor
block’s RACK OK pin is
turned off.
3. SYSTEM MONITOR
block’s HW OK pin is
turned off.
Program RTC.
BAD DATA Bad date and time See NOT
PROGRAMMED.
1. Program RTC.
2. Cycle power.
3. Replace CPU.
4. Replace boards in rack.
5. Replace rack.
PROGRAMMING
FAILURE
RTC failed to program See NOT
PROGRAMMED.
See BAD DATA.
READ FAILURE Unable to read RTC See NOT
PROGRAMMED.
See BAD DATA.
Comm Port
Status (Rack 1)
IO Comm
Link Status
(Rack 2-5)
Good N/A N/A N/A
Item Status Possible Cause Controller Action What to do
Data Link Failure The communications
to a particular rack is
resulting in a lot of
DLL errors.
1. Related rack monitor
block’s RACK OK pin is
turned off.
2. Depending on the
nature of the DLL errors,
the associated rack
monitor block’s module
diagnostics, and pins
could be affected.
1. Use the OI to determine which rack
is experiencing the DLL errors. 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. 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.
4. Cycle power to the rack.
5. Cycle power to the hub.
6. Replace the HC900-C50 expansion
rack’s power supply.
7. Replace the HC900-C50 expansion
rack.
8. Replace the HC900-C50 expansion
rack’s scanner board.
9. Replace the main CPU.
Hardware Failure The power-up test of
the expansion rack
Ethernet controller
failed.
1. All rack monitor block
XIO PORT DIAG are set
to HWFAIL.
2. All rack monitor block
RACK OK pin are turned
off.
3. All modules in the
configuration have their
diagnostic set to
MOD_NOCOMM, their
rack monitor module fail
pin is turned on., and the
rack monitor block’s
RACK OK pin is turned
off.
4. ASYS block’s HW OK
pin is turned off.
5. The statuses for the AO
and AI channels that are
affected are set to
BAD_CHANNEL.
Replace main-CPU module
Port A/B Cable
Mismatch
C70R only. The I/O
cables from CPUA
and CPUB are
connected to the
wrong ports on the
I/O scanner CPU
Controller continues to run
but is not able to access
the I/O on the associated
rack
Swap the cables so that I/O A is
connected to I/O on CPUA and I/O B
is connected to I/O on CPUB