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15-09-2020, 01:57 PM #1
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Grease instead of OIl in Daikin compressor
No traces of moisture ..opened after a failure and found grease-like content in the compressor instead of oil.
Anyone an idea of what this can cause?
ThanksIMG_0240.JPGIMG_0242.JPGIMG_0240.JPGIMG_0241.JPGLast edited by Peter_1; 15-09-2020 at 03:05 PM.
It's better to keep your mouth shut and give the impression that you're stupid than to open it and remove all doubt.
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15-09-2020, 05:49 PM #2
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Re: Grease instead of OIl in Daikin compressor
Hi peter
Is the system on R407C?
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15-09-2020, 07:01 PM #3
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Re: Grease instead of OIl in Daikin compressor
Gas is R410a FrankIMG_0244.jpgIMG_0235.jpg
Last edited by Peter_1; 15-09-2020 at 07:03 PM.
It's better to keep your mouth shut and give the impression that you're stupid than to open it and remove all doubt.
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15-09-2020, 11:56 PM #4
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Re: Grease instead of OIl in Daikin compressor
Is this off a VRV system?
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15-09-2020, 11:56 PM #5
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Re: Grease instead of OIl in Daikin compressor
Could this be analysed in a lab like an oil sample?
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16-09-2020, 06:39 AM #6
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Re: Grease instead of OIl in Daikin compressor
That's what I also suggested...it's coming out of a VRV system... anyhow, very strange... and interesting to know the cause, also for the Daikin factory... it"s someone working for the factory here nearby asking me this
Originally Posted by NH3LVR
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16-09-2020, 04:31 PM #7
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Re: Grease instead of OIl in Daikin compressor
I've seen something similar on many R407C systems where poor installation practices had been carried out - basically insufficient vacuum leading to moisture in the system.
Not seen anything like this on R410a systems though.
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16-09-2020, 07:15 PM #8
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Re: Grease instead of OIl in Daikin compressor
Had some similar oil breakdown with contaminates causing excess heat in comp both times eev stuck causing bypass straigh back to comp
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16-09-2020, 08:36 PM #9
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Re: Grease instead of OIl in Daikin compressor
Interesting post on linkedin earlier from a motor rewind company, if the shaft of an inverter motor isn't grounded properly then current can flow through bearing to ground, via the oil/grease, does it effectively cook it i wonder?
Mostly found in the southern part of this green and pleasant land.
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18-09-2020, 11:05 AM #10
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Re: Grease instead of OIl in Daikin compressor
Looks like moisture in the system.
Bring the lab results please.
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19-09-2020, 04:19 PM #11
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Re: Grease instead of OIl in Daikin compressor
Thanks so far for the input, I'l keep update as soon I have more news... They replaced compressor and it was a tech whom was curious what was inside the compressor... they were in fact not very interested in the cause of this problem... but Daikin can leaer na lot of such a problems
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19-09-2020, 05:29 PM #12
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Re: Grease instead of OIl in Daikin compressor
Don't think its was due to moisture as I would expect there to be copper plating on the bearing surfaces if moisture levels were high.
Have seen oil turn black where discharge temperatures are high, either due to leaking valve plate in a recip comp, and also once where someone had fitted a 3.5kw indoor unit on a 5kw outdoor, suspect it cooked itself in heating mode, the discharge pipe was full of similar black contaminant. Maybe its ran with air in the system due to incorrect vacuuming procedures?
Wouldn't want to warranty the replacement compressor!Mostly found in Oxfordshire, UK :)
