Johnson Controls 300 Series Manual page 70

70 Network Control Module 300 Series Technical Bulletin
Table 24: Diagnostic LEDs, Descriptions, and Remedies
Error LED
LED 1 (flashing)
LED 2 (flashing)
LED 2 Alone
LED 2 with LED 3
LED 2 with LED 4
LED 2 with LED 5
LED 2 with LED 6
LED 2 with LED 7
LED 3
LED 4
LED 5
LED 6
LED 7
LED 7 Flashing and
Processor Halted
LED 8
LED 1 and LED 2
(NCM350 and
NCM361 only)
Description
EPROM checksum error
DRAM read/write error
If an LED 2 DRAM read/write error
occurs, it is followed immediately by a
second LED indicator corresponding to
the source of the DRAM error. If there is
no second LED, there is an on board
DRAM error.
On board DRAM error
SIMM Slot J4
SIMM Slot J3
SIMM Slot J2
SIMM Slot J1
Parity error
NOVRAM error
Serial communication error
ARCNET error
(or ARCNET card not installed)
Sanity error
Clock/calendar error
DRAM Parity
Battery error
MINIBIOS, ROMDOS, or ROMDISK
Checksum error
Action
Power down, reseat ROM SIMM
(NU-ROM101 or NU-ROM150), and
power back up.
Power down. Check the memory switch
settings, and reseat the affected DRAM
SIMM. Then cycle power.
Power down, reseat NU-ROM101 or
NU-ROM150 ROM SIMM, and power
back up.
Cycle power. Review the startup results
using NCSETUP. If any of the internal
loopback tests failed, replace the NCM.
Check the address for the I/O base and
memory base. Check the interrupt
settings. Reseat the ARCNET board and
cycle power on the NCM. (Ignore if
ARCNET card is not being used.)
If the NCM is a Fire-Net NCM
(NU-NCM300-FIRE), both the ARCNET
base I/O address and the ISA Slot 1 base
I/O address must be set to 2E0 (factory
setting).
The NCM may continue to operate but at
a degraded level of reliability.
(Time-of-day also may be affected if the
sanity test fails.)
The NCM may not keep accurate time
during a power down; replace the NCM.
Make sure the battery is properly installed.
Replace the battery if necessary (see the
battery testing procedures).
Replace NU-ROM101 or NU-ROM150
SIMM or update flash.