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W222 KLA problem
05-17-2018, 10:52 AM
Post: #1
Mercedes Benz W222 KLA problem
Hello guys !
I have problem with air condition in MB W222. At morning all working fine, but after some time air condition don't freezing. No have any errors in ECU. System is full. I tried change compressor and valve in system, update ECUs soft, but problem is present . Any ideas?!...
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05-17-2018, 11:24 AM
Post: #2
RE: W222 KLA problem
Hi,
Check the actual value for AC.
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05-17-2018, 11:29 AM
Post: #3
RE: W222 KLA problem
All actual values in AC ECU is OK ! I check it first !
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05-17-2018, 12:39 PM
Post: #4
Mercedes Benz RE: W222 KLA problem
(05-17-2018 11:29 AM)alex1972 Wrote:  All actual values in AC ECU is OK ! I check it first !

Dear Sir:
as you described information, i suggest to check the actual value of evaporator temp. sensor. As A/C system run a period, the system doesn't make cooling air anymore. possible causes are:
1. the temperature sensor detect actual temp not correct (a little higher with actual data) you can change it to make a experimental test. or you can adjust the lowest temp higher to 2 celsius degree in A/C module.
2. inspect A/C hose to locate whether anywhere frost
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05-17-2018, 08:47 PM
Post: #5
RE: W222 KLA problem
All sensor is in correct values .. A/C hoses are not frosting, hoses are warm ..
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05-18-2018, 12:03 AM
Post: #6
RE: W222 KLA problem
does it happens only in auto mode?
if you choose max cooling the same?

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05-18-2018, 12:21 AM
Post: #7
RE: W222 KLA problem
Yes, in auto mode and in max cooling all the same ..
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05-18-2018, 12:23 AM
Post: #8
RE: W222 KLA problem
what are sensor temperatures

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05-18-2018, 01:53 AM
Post: #9
RE: W222 KLA problem
Actual values all sensors is ok! About 18-22 °C , refrigerant pressure about 8-9 bar, but low pressure about 6 bar! About 900 mA is compressor current ..
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