Searle Celler Cooler

[donetello]

Hi not much experience on this equipment ,it is in mates pub and seems to have been running quite a while with little or no gas.was on r12 which ive tried to replace with 413 but system will only run for about a minute or less before shutting off then comes back on after 10 or more minutes then does same again.So its proving difficult to regass or access ,compressor seems ok but when it cuts in theres not alot of movement on gauges whats best way to check compressor is ok.Any help welcome.Cheers.

[Andy W]

Have you identified and corrected the gas leak, have you liquid charged the receiver, are you sure that the TEV is not closed down or even the heat exchanger blocked (had that quite a few times) When it stays off for 10 minutes what exactly is it off on, LP, HP, T/stat, klixon, contactor overload?

[chillin out]

Did you change the filter/drier?
Did you vacuum the system properly?
It sounds like it is going off on H/P switch,
Is the cond clean and undamaged?
Did you liquid charge the gas?

If the comp has stop valves on it you can shut the suction valve and make sure the comp pulls a vac. Then let it sit for a moment to make sure it doesn`t rise again. This would prove the comp is probably ok... hope this helps.

[benijoseph]

Hi not much experience on this equipment ,it is in mates pub and seems to have been running quite a while with little or no gas.was on r12 which ive tried to to check compressor is ok.Any help welcome.Cheers.

Mr, dutlo,
a, Have U changed the oil to polyol easter (poe) for R12 mineral oil is used,
b, Check up the AMPS drawn by the compressor,

I advice U to take help of a techinican, HELP him while he his working, U can learn much more easier,I strongly feel U R COMPRESSOR IS SHORT CIRCUITED OR FAILURE OF RELAY / OLP!
regards,
beni joseph,

[donetello]

All i can tell you all is the liquid line gets very hot when operating whilst the suction remains warm, the gas appears to be circulating through the system but not sure 100%.Ive not changed drier or TEV ,trying first to make certain compressor is ok before fitting new parts,dont think there is any shut off valves on comp to check its pulling and holding a vac is there another way to check comp is ok.

[frank]

system will only run for about a minute or less before shutting off

Sheech - such a small amount af time to make a diagnosis !

[chillin out]

If the liquid line gets v hot then a safe assumption would be that the comp is ok .
make sure the cond is clean and is getting a good air flow

[Brian_UK]

...system will only run for about a minute or less before shutting off then comes back on after 10 or more minutes then does same again.So its proving difficult to regass or access ,..........................

If the system was evacuated properly then the recharging should not have been a problem.

compressor seems ok but when it cuts in there's not alot of movement on gauges ..

The perhaps there is a shortage of refrigerant.

the liquid line gets very hot when operating whilst the suction remains warm,

What is the state of the refrigerant charge ?

Please give us some readings so that we have something to work with.

If the compressor is shutting down after about 10 minutes and the pipes are hot then we get back to a refrigerant charge problem. Are there any pressure switches in the circuit which are operating when you run it ? But, to be honest it sounds like the compressor Klixon is operating due to overheating; which comes back to the refrigerant charge.

[Abe]

he says it runs for a minute..........

Therein lies the clue.......

Compressor stops.

What makes it stop???

yes...............a control................

Donatelo............tell us which one????

[Temprite]

All i can tell you all is the liquid line gets very hot when operating whilst the suction remains warm, the gas appears to be circulating through the system but not sure 100%.Ive not changed drier or TEV ,trying first to make certain compressor is ok before fitting new parts,dont think there is any shut off valves on comp to check its pulling and holding a vac is there another way to check comp is ok.

R 413 runs higher head pressure than r 12.Maybe unit is tripping on hp control. Certainly sounds like it.

Warm dryer lack of condenser airflow? Although all the old commercial r12 systems that I have seen with drop ins seem to run a warmer dryer than previously.

[coolman]

Here is a link to the specs of R413a

http://www.isceon-refrigerants.co.uk...brochure49.pdf

If the liquid line is hot, generaly there is a condensation problem.
If there is a condensation problem, then normaly the evaporator wil not function fully and suction will not become cold.

So take 2 bucket of water and clean the condensor, then restart, take readings and fix it.

Victor