sojudemon Posted July 1, 2010 Share Posted July 1, 2010 ATM GEN OUT LIGHT, FREQS VOLTS LOAD OK. Gen contactor/GCP changed...any ideas? Quote Link to comment Share on other sites More sharing options...
bischoffm Posted July 1, 2010 Share Posted July 1, 2010 Is it powering the the Essential bus?? Are you just getting the light? Quote Link to comment Share on other sites More sharing options...
sojudemon Posted July 1, 2010 Author Share Posted July 1, 2010 ATM works as advertised! The only thing wrong is the light... Quote Link to comment Share on other sites More sharing options...
tusker Posted July 1, 2010 Share Posted July 1, 2010 Remove the bulb!!.....No No it's a morning joke!!.......Good morning guys!!..........................John Boy .....sorry! I should not have written that. but I couldn't resist. Quote Link to comment Share on other sites More sharing options...
tinyclark Posted July 1, 2010 Share Posted July 1, 2010 (edited) Really isn't anything there besides the contactor, GCU and the light assy. You can pull the wire off the terminal board that goes to terminal 2 of the light assy, though I have no idea what aircraft you have, so I can't say what the TB or terminal # is. ESU-TB5A, terminal 9? See if the light goes out. If it doesn't, the light assy circuit is bad. Edited July 1, 2010 by tinyclark Quote Link to comment Share on other sites More sharing options...
Tim Goken Posted July 1, 2010 Share Posted July 1, 2010 There is a good chance the PIR(Power Indicator Relay) or the blocking diode going to the PRI is bad. I believe they are both in the generator control panel. I would change the GCP and give it a shot. Hope this helps. Let us know what you find. Quote Link to comment Share on other sites More sharing options...
Herc 308 Posted July 3, 2010 Share Posted July 3, 2010 Some times the end of the bulb gets mushroomed and causes the light to stay on especially with the press to test lights. Quote Link to comment Share on other sites More sharing options...
tenten Posted July 3, 2010 Share Posted July 3, 2010 If the circuit is identical with H model (for the light to remain “off†needs 28v to be delivered from FSR to the GCP) therefore you may have: 1-FSR malfunction. 2-Continuity between FSR and GCP is broken. Quote Link to comment Share on other sites More sharing options...
tenten Posted July 3, 2010 Share Posted July 3, 2010 If the circuit is identical with H model (for the light to remain “off†needs 28v to be delivered from FSR to the GCP) therefore you may have: 1-FSR malfunction. 2-Continuity between FSR and GCP is broken. What’s up by me!!!!.... “Non senseâ€. Memory alone misleading. (TSN Exceed 464,000,000)hrs. Apologize. Back to the books. Yet book troubleshooting leads only to: 1- ATM Generator Control Panel (GCP). 2- ATM Generator Contactor. Since both had been changed.We should look for the unusual……. (Defective Wiring) Quote Link to comment Share on other sites More sharing options...
Zaherk Posted July 6, 2010 Share Posted July 6, 2010 An often overlooked culprit, have you checked out the Ground Fault Transformers, happened to us the other day, everything looks right but as soon as you switch the atm gen on the light comes on with no power. Quote Link to comment Share on other sites More sharing options...
NATOPS1 Posted July 7, 2010 Share Posted July 7, 2010 The Gen Out light is Illuminated The ATM powers the Ess AC Bus The GCP has been swapped (with an engine and found to be good?) And the Gen Contactor has been changed. Pull the "ATM gen out light" CB and see what happens. Quote Link to comment Share on other sites More sharing options...
khaledrajadalabih Posted July 13, 2010 Share Posted July 13, 2010 ATM GEN OUT LIGHT, FREQS VOLTS LOAD OK. Gen contactor/GCP changed...any ideas? if the ATM feed ESS ac bus and the problem just the light, replace ATM generator contactor may be bad contacts in side it Quote Link to comment Share on other sites More sharing options...
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