Northern Telecom Meridian SL-1 Reference Manual page 14

2-10 Fault detection and locating
2-Mb/s Remote Peripheral Equipment
Chart 2-4
FN fuse operates or FN LED is extinguished
N When not equipped with cooling units, the cable from the
o QUX19 should be connected to J7 on the QUAA3 unit. When cooling
t units are equipped, J7 is connected to the cabinet wiring leading to the
e cooling units.
:
St ep Ac ti on
1 Check connector J7 at rear of
QUAA3 unit. Connection should
be secure.
2 Ensure that FN fuses are not
blown or defective.
3 If fuses are good and FN LED
is not lit, replace QUAA3 unit.
Appendix 1 to 553-2741-500
Ver if i cat io n
If fuse blows when replaced,
replace fan units one-at-a-time.
If fault persists replace cabling
to cooling units at rear of
cabinet followed by QUX19 unit.