maki
17-07-2012, 10:07 PM
Hi.This is the first time i work on mitsubishi city multy and need help.I ve got two outdoors unit puhy-p300yhma and puhy-p350yhma joint together in puhy-p650yhma.I am the fourth or fifth person who came to service the system.
Customer told me that they are said it s problem with gas leakage and that are they every time add refrigerant in the system but they are not work so fine(coolinG) i recovered refrigerant and it was 50kg then i make a pressure test with nitrogen on 37 bar and there was no leakage.
Outdoors unit are on the roof of 7th floor and indoor are on ground floor and 1st floor hight difference 25meters.ON the first floor there are 10 indoors unit and on the second 14.
I put 40 kg by the book and there was no cold air on indoor.Then i put another 10 kg and i ve got cooling on ground floor but no on 1st floor.
And then customer told me that they have central controller g50 and there was 28indoor unit and they told me that problem start when serviceman before clean the units and after that one of them have water leakage. So I look at that unit and notice that every few second led flash goes on and off and one of the relay too and water pump didn't get voltage. Then i go to switch off the unit on remote par 21maa and nothing. And then they told me that there was a problem with that remote and they put new one and that are 3 indoors are on them but the old one stay and they have one more controller excess on the first floor.
That controllers have power but don't manage the units. Then i go to the first liquer store and getting drunk.
So my problem is did I put too many refrigerant and is there a problem with that few controller excess that I cant get cooling on the 1st floor. I used a manual for the add. refrigerant and I cant get the" Does 8°C [14.4°F] Tc-TH3 12°C [21.6°F] hold true?" its about 40°C booth and th4 is about 65-70°C th6 is also 40°C or I just need too add more refrigerant.
Sorry for my English and this problem who is my nightmare with that attentive customer.
Customer told me that they are said it s problem with gas leakage and that are they every time add refrigerant in the system but they are not work so fine(coolinG) i recovered refrigerant and it was 50kg then i make a pressure test with nitrogen on 37 bar and there was no leakage.
Outdoors unit are on the roof of 7th floor and indoor are on ground floor and 1st floor hight difference 25meters.ON the first floor there are 10 indoors unit and on the second 14.
I put 40 kg by the book and there was no cold air on indoor.Then i put another 10 kg and i ve got cooling on ground floor but no on 1st floor.
And then customer told me that they have central controller g50 and there was 28indoor unit and they told me that problem start when serviceman before clean the units and after that one of them have water leakage. So I look at that unit and notice that every few second led flash goes on and off and one of the relay too and water pump didn't get voltage. Then i go to switch off the unit on remote par 21maa and nothing. And then they told me that there was a problem with that remote and they put new one and that are 3 indoors are on them but the old one stay and they have one more controller excess on the first floor.
That controllers have power but don't manage the units. Then i go to the first liquer store and getting drunk.
So my problem is did I put too many refrigerant and is there a problem with that few controller excess that I cant get cooling on the 1st floor. I used a manual for the add. refrigerant and I cant get the" Does 8°C [14.4°F] Tc-TH3 12°C [21.6°F] hold true?" its about 40°C booth and th4 is about 65-70°C th6 is also 40°C or I just need too add more refrigerant.
Sorry for my English and this problem who is my nightmare with that attentive customer.