Johnson Controls 300 Series Manual page 69

Network Control Module 300 Series Technical Bulletin
Self Diagnostics: Microprocessor Indicators and
Troubleshooting
NCM power up self-diagnostics follows this sequence:
1. After applying power, the LEDs randomly light during
initialization (for approximately 1 second), responding to
commanded positions.
2. An LED (LED 1 through 8) flashes as an indication of the NCM's
firmware revision (for example, LED 1 for Revision 1 of the
NCM300 or NCM311, or LED 8 for Revision 1 of the NCM350 or
NCM361).
3. All LEDs flash simultaneously, followed by each LED flashing in
sequence, starting with the LED closest to the top of the board
(by the N2 connector).
4. The software executes tests for EPROM checksum and DRAM
read/write, followed by other startup diagnostics. LED 8 is on
during this test.
5. If no errors occur, the LEDs remain off (except Power). If errors
occur, they are displayed as shown in Table 24. Failure of Test 1 or
2 causes that LED to flash until power is cycled; the remaining
error LEDs appear only momentarily.
(If necessary, use the NCM miscellaneous diagnostic tests on
NCSETUP to view the startup errors.)
6. After successfully completing the startup tests, all the LEDs light
for about five seconds.
7. The NCM's node address (decimal) is then indicated as a binary
number using LEDs 1 through 8. Bit 0 corresponds to the least
significant digit (LED 1); Bit 7 to LED 8. The address remains lit
for 5 seconds. (Example: LEDs 1, 2, and 6 On indicate a
NOVRAM node address of 35.)
8. If the NCM has been previously downloaded, with the battery
connected, it begins with its operational state. If no download has
been performed, the NCM requests a download. LED operation is
switched to hardware use for RECV/XMIT status of the serial
channels.
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