Mcquay Chiller problem

[hitmanzak]

Hi all, just joined and found this site to be very interesting and full of knowledge.
Any way heres my issue, went to a Mcquay chiller the other day late on, customer wanting to get away so only got the fault reading and a return visit due this week.
ALS chiller with 2 screws, 1 system not running and showing a fault on "NO LIQUID RUN" ?
No manual on site and cant get hold of any info from Mcquay, can any one pass on info on where abouts i can get manuals etc or even help with the fault.
cheers, keep up the good work.. ;)

[Lowrider]

I have one. It's not as extended as one would hope!


If you PM me your e-mail I'll send it!

[GHAZ]

hello mate give us the chiller model and i might be able to help

[hitmanzak]

I have one. It's not as extended as one would hope!


If you PM me your e-mail I'll send it!

Sorry, how do i do that, cant see anything for PM:o

[hitmanzak]

hello mate give us the chiller model and i might be able to help

Sorry,
left the report at the office, will let you know the model tomorrow, cheers:mad:

[Lowrider]

Sorry, how do i do that, cant see anything for PM:o
top of the page, private messages. If you don't see it you'll have to go to the control panel (user CP) and enable it!

[nike123]

http://www.mcquay.com/McQuay/Literature/Literature

[goshen]

hi if it is a pco controller email me and i will mail u the manual:)

[hitmanzak]

Hi all, the model is "ALS 131.2 ST PWS"
Fault shown is no liquid run, going back tomorrow to investigate, has any one come across this fault before?
cheers:)

[Lowrider]

Did you receive the manuals?

[hitmanzak]

Yes thanks, had a quick look at the manuals and they dont appear to be the same as the chiller, different model. Any way being to the job today and identified a restriction in the drier, a return visit will be required to complete.
Thanks for your help.:)

[Gachot]

I have different type of problem. The unit goes to "condenser pump maintenance" alarm. The problem is that unit doesn't have a condenser pump (it's air cooled), and there fore there is no condenser pump hour counter in the maintenance menu. I have all required passwords, but they don't help. I've been looking for the option to switch the unit to water-water type so i could get the timer in the menu, but this option also doesn't exist. Need help. The type of unit is ALS E with 2xCarel PCO2 controler. As I said, I have all passwords but they don't do much good. I have some manuals, but as the unit is air cooled there is nothing about this. The code and error is mentioned in the manual, but that's all.

[goshen]

Hi there gachot sorry but you have no choice but to call in mcquay techs to upgrade the software on the controller
this is an official mcquay bug!!!
u have no way of solving this yourself, this comes from experience.
by the way next time u should open a new and seperate thread let us know how it went.

[HallsEngineer]

There is a way to reset the controller but you need to get all the settings out of every menu pull the battery backup for the chip then re-insert all the settings then 3 years later do it all again. Sorry.

[nike123]

If you have EasyTool (http://www.carel.com/carelcom/web/eng/catalogo/gamma_dett.jsp?id_gamma=2) software you could easily change that settings!

[goshen]

If you have EasyTool (http://www.carel.com/carelcom/web/eng/catalogo/gamma_dett.jsp?id_gamma=2) software you could easily change that settings!


;)hi how do u get it?

[nike123]

;)hi how do u get it?

You buy it from Carel!
http://www.refrigeration-engineer.com/forums/showthread.php?p=154644
http://www.gafco-altron.nl/Html/Files/1tool%20software%20en%20programma%20voor%20HVAC_R%20leaflet.pdf

[goshen]

thx ! when i had that problem i used a tech who had a copy i think i will purchase a copy .

[Gachot]

2 goshen: I thought that this is a bug in the software and I am already in process of getting the new software. Sorry about the tread.
2 HallsEngineer: I had that in mind. There is also an option in the menu "reset to factory settings" or similar, that could maybe also do the trick, but as fixing is not that urgent (the machine works in alarm), better to ask than to reset all settings and than put them all back for nothing. If you say it will do the trick, it's not a problem. I have 3 same chillers so I have backup :)
I even thought to take the software from the unit with less working hours and put it in this unit (with Carel key). One unit have the condenser controller and works thrue the winter, and the other two units work only in summer days, so the difference in working hours is big.

I will deal with Nike123 directly as he is about 400km away in the same country :)

Thanks for now. I am waiting to see will I get the new software from factory, if not, I will try some of your advices and let you know.

[goshen]

good luck!!

[cwm]

There is a way to re set timers,
Send your Email address and I'll send you, 2 pages of instructions.
Later ! Adam..

[goshen]

HI cwm would be happy how u do this as i tried and failed
gill@gosheneng.co.il

[manoj007]

hi
I have a problem in mquay whs chiller is that it getting the oil lift in entire system many times it has been occur so please tell what is the reason for it also tell me the how can we recover the oil into oil separator.

[philpsy]

hi
I have a problem in mquay whs chiller is that it getting the oil lift in entire system many times it has been occur so please tell what is the reason for it also tell me the how can we recover the oil into oil separator.

what? .

[narender singh]

Dear friend ,
first of all you check it's liquid line filter drier if that choke this type problem occur

[howard004]

I have different type of problem. The unit goes to "condenser pump maintenance" alarm. The problem is that unit doesn't have a condenser pump (it's air cooled), and there fore there is no condenser pump hour counter in the maintenance menu. I have all required passwords, but they don't help. I've been looking for the option to switch the unit to water-water type so i could get the timer in the menu, but this option also doesn't exist. Need help. The type of unit is ALS E with 2xCarel PCO2 controler. As I said, I have all passwords but they don't do much good. I have some manuals, but as the unit is air cooled there is nothing about this. The code and error is mentioned in the manual, but that's all.

Do U slove your problem? I have a same trouble. would u tell me how to slove it?

[goshen]

Do U slove your problem? I have a same trouble. would u tell me how to slove it?
the answer is in the thread!!!!!:D

[psycho]

no liquid run is detected by the liquid sensor on a frame two at least and means that you may not have enough liquid being injected into thwe compressor , not a good thing , low charge or failed liquid injection solenoid ( unlikely)
prob not a solid state relay failiure as i think that the liquid inj solenoid operates through the compressor contactors aux contacts . prob low refrigerent


AM I A SLUT OR WAT !!
)

[shahbazkhan]

my brother please check exv driver may be exv driver no going to proper command.one more thinks doing exv 75% persent stuck.analize suction pressure and temperture,lvg temp
then manual check gauage and thermometer.how is commimg superheat.

[goshen]

my brother please check exv driver may be exv driver no going to proper command.one more thinks doing exv 75% persent stuck.analize suction pressure and temperture,lvg temp
then manual check gauage and thermometer.how is commimg superheat.

notice the dates!!:)

[duck4cover]

I have different type of problem. The unit goes to "condenser pump maintenance" alarm. The problem is that unit doesn't have a condenser pump (it's air cooled), and there fore there is no condenser pump hour counter in the maintenance menu. I have all required passwords, but they don't help. I've been looking for the option to switch the unit to water-water type so i could get the timer in the menu, but this option also doesn't exist. Need help. The type of unit is ALS E with 2xCarel PCO2 controler. As I said, I have all passwords but they don't do much good. I have some manuals, but as the unit is air cooled there is nothing about this. The code and error is mentioned in the manual, but that's all.



How did you fix it mate?? Also ive got evaporator pump maintence fault

[DAC josep]

Any one can advice about the Mcquay WDC chiller compressor impeller pull out method .please.....