Daikin RXS35BVMB L5 error - how to proceed?

[slogps]

Hi all the experts!

I am writing to you, because nobody official in my country will help.
All they can offer me - is to buy new one - and that is expensive.

I have Daikin RXS35 BVMB Outdoor model.

Only fan is working.

When running test mode it works like this:
Fan starts and works for around 30 sec.
Then compressor starts and it works for around 5 sec. I can hear the pump working.
Then it shuts off.

When tested I get L5 error.

What to do now?

I am not really electric handy, but do know the basics, can weld and do stuff.

Please give me some instructions on how to proceed to repair the device.

Thank you!!!
Mitja

[Brian_UK]

Fault Code L5 =
L5 Outdoor Comp motor ground fault, Short circuit

Check the compressor for electrical faults.

[ncabral]

hello may i help you you have too see pcb inverter board fault

[The Viking]

With the L5, as Brian says, you will have to check the windings of the compressor.

First you have to remove the cable from the compressor then:

-With a Ohm meeter, check the resistance between the (power) terminals on the compressor. This should be a couple of Ohms and it should be the same between all 3 pins.
-With a Mega Ohm meeter or insulation tester (a meeter that spikes the part to be tested), check the resistance between the (power) terminals on the compressor and it's shell (suction or discharge pipe). This should be completely open circuit.

Happy hunting.

:cool:

.

[slogps]

Thank you all!
Will check and get back if I will have more questions!

Thanks again!

[slogps]

back again..

now I have measured resistance on power cables of compressor and got on all 3'0.

then I checked cable connections and after that tried to run it.

now I get E5 error.

what to do now?

[slogps]

oh, yes, I did try if there is gas in pipe, so I pushed the small valve inside not even for a sec.
And with quite high pressure gas pushed out.
But I did it not even for a second. So there should be enough gas there.

[slogps]

did some more checking, found that I left compressor cables unconnected, that is why I received E5 error.
now I have reconnected it and the same error L5 appears.
what to do?

[The Viking]

And what resistance did you have between the windings and earth?

[install monkey]

l5 means compressor is goosed, you need to buy a new compressor and to get the warranty you need the inverter pcb too-not cheap, when u tested the windings did u use a multi meter? that will only prove the resistance in ohms of the windings the insulation needs testing with a megger- to test each winding to the casing of the compressor body with the leads disconnected- anything around 1 megohm its goosed.

also an inverter checker connected to the compressor leads will prove the inverter pcb is giving 3 outputs at the same output by watching for all flashing led's dont leave it on for longer than a minute otherwise it will get cooked.

[slogps]

so there are 6 cables going to compressor

between all 3 - red, yellow and blue - I got 3.0 OHMs.
when measured these 3 to brown (upper right one) - I got 2.2 OHMs.

When measured to black and grey and to earth - I got 1 OHM.

Device is from 2003, there is no warranty anymore :-(
Don't have the checker.

I suspect it's either bad contact somewhere or something wrong on the PCB.
If I only new where to look on PCB.

[install monkey]

http://www.mediafire.com/view/?uneezt2gm9u83ng
may help, you need to prove the same voltage to the compressor on all 3 cables- the ones connected to the pcb on terminals u v w- when it tries starting usually around 170v ac accross any 2 terminals
its always the compressor

[The Viking]

So,
From red, yellow or blue to earth?
And did you use a normal multimeter for this?

If you haven't got a insulation tester/mega ohm meter you can test the insulation like this:
WARNING: Do not carry out the following procedure unless you are experienced and suitably qualified!

1. Disconnect all cables from the compressor except for the earth.
2. Ensure the compressor and the unit itself are properly earthed.
3. Make sure there is proper earth on the shell of the compressor.
(Got the idea? Earth here will save your life)
4. Connect a normal 240V light bulb (in suitable lamp holder/fitting) with one cable to a live 240V feed and the other in turns to the terminals where the Red/Yellow/Blue cables were fitted on the compressor.
(it is a good idea to use a lamp fitting with an inline switch)

If the lamp lights up, even if it is just dimly, your compressor is goosed.

:cool:

[cool#9]

l5 means compressor is goosed, you need to buy a new compressor and to get the warranty you need the inverter pcb too-not cheap, when u tested the windings did u use a multi meter? that will only prove the resistance in ohms of the windings the insulation needs testing with a megger- to test each winding to the casing of the compressor body with the leads disconnected- anything around 1 megohm its goosed.

also an inverter checker connected to the compressor leads will prove the inverter pcb is giving 3 outputs at the same output by watching for all flashing led's dont leave it on for longer than a minute otherwise it will get cooked.

...and i've recently learn there are 2 "hidden engineer modes" to be sure of that by the inverter checker for split and multi... looks like VRV's power module transistor check....

cool#9