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Thread: Fujitsu AOY30TMBDL Help Please!
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30-03-2010, 08:42 PM #1
Fujitsu AOY30TMBDL Help Please!
Fujitsu AOY30TMBDL. Error Code E:01 = Communication between indoor/outdoor unit. Found T3.15a Fuse blown on outdoor pcb. Board looked knackered and burnt so replaced board. Plugged one thing back in at a time on board and powered up. Last thing to plug back in was the transformer, power up and pop goes 3.15a pcb fuse. I unplugged both connections from tranny to pcb, replaced fuse on pcb and power on - no popped fuse. I plug in the 2 purple leads from tranny into pbc and power on - no popped fuse. Once the other plug from the tranny is plugged into board the fuse pops, suggesting tranny is at fault. I have tried 2 other known to be ok trannys, and the fuse keeps blowing! Any ideas anyone? Many thanks in advance...............
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30-03-2010, 09:19 PM #2
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Re: Fujitsu AOY30TMBDL Help Please!
It is probably fault at PCB. Unplug everything except transformer and PCB and try again.
Last edited by nike123; 30-03-2010 at 09:25 PM.
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30-03-2010, 09:26 PM #3
Re: Fujitsu AOY30TMBDL Help Please!
Isn't the tranny just for the main power relay coil? (12v)
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30-03-2010, 09:42 PM #4
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30-03-2010, 09:47 PM #5
Re: Fujitsu AOY30TMBDL Help Please!
It is fine until the transformer's 2 red wires (pressuably the low voltage supply) is plugged into pcb. Tried 2 other trannys - still the same.
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30-03-2010, 11:11 PM #6
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31-03-2010, 12:57 AM #7
Re: Fujitsu AOY30TMBDL Help Please!
Tranny supplies low voltage (5, 12 & 24v to PCB. If the fuse is still blowing then a low voltage function is shorting out. Fuse only blows when tranny supplies power to low voltage.
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