Nautel GV30N, Troubleshooting Manual

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GV30N TROUBLESHOOTING MANUAL RESPONDING TO ALARMS
PAGE 4.1.54 VERSION 0.1 2014-11-01
1. Open the transmitter’s front doors.
2. Identify the cooling fan(s) that is being replaced (see Figure 4.1.19 on page 4.1.53 ), noting the
function of each fan (e.g., B3 is splitter fan 1, B6 is 10 kW reject load fan 1, B4 is 5 kW reject load
fan 1, B1 is final reject load fan 1, etc.).
3. Remove the fan cover by removing and retaining the four M5 screws at the top and lifting the
panel out. The bottom of the panel has hooks that fit into slots.
4. Disconnect the suspect fan’s mating plug (B1P1 through B5P1 from its associated mate on reject
load/splitter interface PWB A28 or B6P1 through B11P1 from its associated mate on reject load/
splitter interface PWB A30).
5. Remove the suspect fan (including connector) by removing and retaining the two M3 screws that
secure the fan to the transmitter. Retain the fan’s finger guard (Nautel Part # HAA63).
6. Obtain a replacement fan (Nautel Part # ZAP50) from the site spares kit or station spares kit, if
purchased or a suitable equivalent (vendor part # is Minebea Motor Mfg. Corp. 3115RL-07W-B79-
E51).
7. Install the replacement fan, and fan finger guard, using retained screws from Step 5 . Torque
hardware to 1.0 inch-pounds only to avoid cracking the fan’s body.
8. Connect the replacement fan’s mating plug to the appropriate mate on reject load/splitter interface
PWB A28 or A30, as applicable.
9. Reinstall the fan cover using the retained screws from Step 3 .
10. Close the transmitter’s front doors.