Quality Logic Test; Troubleshooting - Honeywell LC13-510 Manual

3.2.3 Quality Logic Test

Load the node personality while observing the LEDs on the boards. The first part of the
load process automatically loads and runs the Quality Logic Test. As the QLT runs, the red
and green LEDs should cycle as they did during the power-on (firmware) test (see
subsection 3.2.1). The QLT takes only a few seconds to run, whereas the firmware test
takes considerably longer. When the QLT finishes, check that on all boards the green LED
is on and no red LEDs are on. Check that the correct node address is displayed on the
alphanumeric display on the K2LCN OR K4LCN.

3.3 TROUBLESHOOTING

The troubleshooting procedures in this manual are grouped by affected ORU and are keyed
to the LED indicators and the alphanumeric display. First, a malfunction symptom is
listed, then instructions are given to check or replace parts in order of the most likely
causes. Perform the first indicated step, and then test. If the malfunction is still present,
perform the next indicated step and test again, continuing in this manner until the
malfunction is corrected. Do not perform the remaining steps after the malfunction has
been corrected.
In the following procedures, the indicated LEDs are red unless otherwise stated. Refer to
Section 4 for disassembly and assembly instructions.
The KLCNA (or CLCN-A) and KLCNB (or CLCN-B) boards were designed so that they
can be replaced while power remains on. Also, the fan may be unplugged for a brief
period for troubleshooting while power is on (see subsection 3.3.1). In all other cases,
always turn power off before removing or replacing a part on the node, as this protects
equipment from voltage transients and ensures proper initialization. You may turn power
off for one node while leaving the other node on and operating. If you can't correct the
fault by performing these procedures, refer to Appendix A for alphanumeric display
troubleshooting. If you still cannot isolate the fault, contact the Honeywell Technical
Assistance Center (TAC) in the U.S., or the equivalent service in your area. The telephone
number for TAC is 1-800-822-7673 (1-602-863-5558 for Arizona callers).
All assemblies used in this module are likely to contain electrostatically sensitive devices.
Use a personnel grounding strap and grounded work surfaces and equipment. Store and
transport parts only in electrostatically safe containers.
The K2LCN OR K4LCN board has visual indicators to assist in troubleshooting. These
indicators are shown in Figure 3-2. There is a green LED which indicates that the board
has successfully completed its self-test program. There is a yellow LED which indicates
that data is being transmitted to the LCN network. There is a red LED bar display which
indicates errors at the end of the self-test program. Individual indicators in the bar display
may blink during the self-test procedure. Successful completion of the self-test program is
indicated when the green LED is on and all of the red LEDs in the bar display are off.
Dual Node Module Service
CAUTION
3-3
3.2.3
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