chiller compressor high pressure alarm

[paulrs86]

hi guys.

im have been in the air conditioning trade for 9 years now mainly doing installs on vrvs and split systems.

today i got asked to look at a climaveneta chiller which feeds a big shop in a shopping centre <1 of many>

when i got there on the control panel it says 'compressor high pressure alarm'

there was no way of runnig the system until the fault is rectified. coils are clean and so are filters fan motors seem good. i didnt want to go any further as i am not confident enough and didnt want to balls it up even more.

i woud really like to know what could be causing this as i hate being defeated could anybody please shed some light on what could be causing this fault.

many thanks

[chemi-cool]

High pressure above settings will stop the compressor and set alarm off.

The reason can come from a few places, some of condenser fans not running, too much refrigerant, air in the system, a nylon sheet blocked the entering air, faulty high pressure sensor.

[paulrs86]

There is only 1 fan for condenser the other fan is inside the unit attached to a belt. 1 thing i forgot to .ention is they are ducting their heavy duty dishwasher into the a/c duct and obvioisly when the unit doesnt run the steam is backing up the duct and dripping all over the ceilings

[frank]

What has ducting and dishwasher discharge got to do with a chiller?

[paulrs86]

Ok maybe its not a chiller its an ac unit on the roof a package unit

[install monkey]

can we clarify-the clima venta chiller on the roof- has 1 fan on it, this chiller serves a shopping ctr, so were talking big stuff
a commercial dishwasher exhaust is ducted onto the return air of the air handlng/fan coil unit- which is belt driven.

-whats the model number of the chiller
-ur fault is with the chiller -hp alarm, requires resetting then moniter running pressure,td accross cond coil,checking the running current of the outdoor fan motor- ensuring the overload is rated 125% over the running current.
find the hp switch if its manual reset, isnt nuisance tripping
try these codes for alarm resetting
125
348
0348
9990

[paulrs86]

Do u know what type of ac im talking about as i said i only really work with vrv and split systems. Its just trally bugging me and want to get my head round it

[install monkey]

chiller - water circuit
split- gas circuit
:confused:

[paulrs86]

It is r407c with 1 3phase compressor. I cant reset it it says the fault needs to be rectified before you can run system

[paulrs86]

The motor with the belt blows the air into the building and the fan on top of the condenser rejects the heat right? Then at the end other end of unit is where the duct comes back and where they are rejecting their dishwasher discharge

[install monkey]

manual hp reset - on the discharge pipe- or ranco/sanyagia/penn tiny reset latch

[install monkey]

rooftop unit:)

The motor with the belt blows the air into the building and the fan on top of the condenser rejects the heat right? Then at the end other end of unit is where the duct comes back and where they are rejecting their dishwasher discharge

[paulrs86]

Sorry i dont understand. How do you manual reset?

[install monkey]

little push button on the pressure switch

[paulrs86]

So if fans and coils are good where would i best best to look next? Will i deffinatrly be able to do a manual reset?

[install monkey]

10715red button .......

[install monkey]

hp switch will be near the compressor (big heavy thing that chuggs)- mounted on the discharge pipe (smaller hot pipe) if theres no button to press on the pressureswitch, u may need to aknowledge the alarm on the touchscreen controller( try the codes earlier mentioned for access to reset fault)

[paulrs86]

Thanks alot so once ive reset it il be able to run the unit and check currents and pressures

[chemi-cool]

or one of these
10716

[install monkey]

hopefully- im lookin for climaventa kit to see if u recognise it as were clutching at straws


Thanks alot so once ive reset it il be able to run the unit and check currents and pressures

[install monkey]

http://www.climaveneta.com/GLOBAL/Products/46/roof-top-units/air-cooled-fully-configurable-high-efficiency-rooftop-units/
click on link above- is it one of these??- let us know model number

[paulrs86]

I got mixed up its not climaveneta they was from yesterdsy i cant remeber the name air something air conditioning big blue panels lol

[paulrs86]

Typical im such a twat

[install monkey]

BLUEBOX!- u sure???- u deffo working on the right system???- :p
the pressure switch on the hot pipe should be the same -as for passwords-
300 Maint.200 Prog.
400 Store
0003 Factory
0001 Time

feel sorry for any moderator who has to clean this thread! :o

I got mixed up its not climaveneta they was from yesterdsy i cant remeber the name air something air conditioning big blue panels lol

[paulrs86]

Ah that danfoss dual pressure control is on the unit :)

[paulrs86]

Its not called bluebox ut it looks like a bluebox manufactured in 2006

[install monkey]

before we continue- can u comfirm its one of these
http://www.bluebox.it/en/

[paulrs86]

I k ow the maint and service passwords one is 0003 and other is 0002 i think

[install monkey]

http://www.dulux.co.uk/colours/blue/
what shade is it?? :D

[paulrs86]

Maybe royal blue

[chemi-cool]

So far I'm amused, it might even work by dawn...

[paulrs86]

It was called air ________ air conditioning

[install monkey]

airedale????

[install monkey]

http://youtu.be/RWgR-4dcbc4


blankety blank!!!:D

It was called air ________ air conditioning

[paulrs86]

Nope not airedale ive never heard of them before.....

[install monkey]

different approach-
what company/shop was the customer??
wheres the site?
can u spot it on google street maps??

[install monkey]

can the name on the thread be changed to
blue thing on roof - no name - no worky??:D

[paulrs86]

Hahahahaahahahaha

[paulrs86]

Looked on google maps too blury to see them really

[install monkey]

http://www.yell.com/ucs/UcsSearchAction.do?keywords=air+conditioning+manufacturers&location=&scrambleSeed=32789652&searchType=&M=&bandedclarifyResults=&ssm=1

[chemi-cool]

Air France?

[marc5180]

Surely this has to be a joke.....

Can you help me fix it but I don't know what 'it' is.

My advice would be to leave well alone!!:confused:

[jdunc2301]

Splits and vrv's never heard of Airedale...

[moondawn]

this thread is so funny can the original poster please give more info.

[frank]

9/10 for Install Monkey so far.....if his patience lasts for another 10 posts then I might upgrade my mark to 10/10 :D:cool::p

[paulrs86]

hi guys just to let you know it was a faulty high pressure sensor all sorted now :)

[marc5180]

What type of unit was it?

[install monkey]

been trying to find that out for the last 45 posts!:D

What type of unit was it?