back2space
11-10-2010, 10:29 PM
Evening all...
Unit at work doesnt cool when asked to cool and is working intermittently...
I.e room temp 25C set temp 23C compressor will cycle on for 5 minutes then it will turn off and if yo go into the service menu the operation details in the controller comp Htz are at 0.0 when the compressor should be running... air offs are about 14C when compressor does run. 6 weeks ago monitoring device was placed at the airoutlet to monitor air offs over a 24hr period and unit was turned to 18C. Unit would never achieve 18C in this room anyway as it never really drops below 22C as unit is undersized for the room but when they got the data back the air off temps returned to ambient at various times through the night as if the unit was switched off. However it wouldnt have been possible to turn it off as the controller panel is locked in a cabinet in the room so could not be turned off. I was also on shift at the same time so know this wasnt possible for it to be turned off.
Seem to have to turn unit on and off a few times and then compressor will start.
Have checked the error logs in the service menu and E57 comes up which is for shortage of refrigerant. This error code must have been from a while ago too as the compressor run time is about 11775 hours and this error code was entered when compressor run time was at 10555 hours.
However this error code isnt flashing up on the controller and the indoor unit continues to run. Only way to see the error code is by accessing the service menu so this leads me to think that this error code is no longer valid.
How would you remove this error code from the controller? Does it have to powered on and off at the outdoor unit? Or do error codes always remain in the log?
I am confused as no error code is coming up when we turn the unit on and when you look at the controller all appears to be well.
We have had an engineer attend today but given past experience at work with our service engineers they dont do the work they are supposed to and most of the time do not check the controller or know how to check it.
Todays engineer was here 2 hours (I work nights so didnt have chance to see him) however the error code still shows up in the controller log.
Any ideas?
Thank you.
Unit at work doesnt cool when asked to cool and is working intermittently...
I.e room temp 25C set temp 23C compressor will cycle on for 5 minutes then it will turn off and if yo go into the service menu the operation details in the controller comp Htz are at 0.0 when the compressor should be running... air offs are about 14C when compressor does run. 6 weeks ago monitoring device was placed at the airoutlet to monitor air offs over a 24hr period and unit was turned to 18C. Unit would never achieve 18C in this room anyway as it never really drops below 22C as unit is undersized for the room but when they got the data back the air off temps returned to ambient at various times through the night as if the unit was switched off. However it wouldnt have been possible to turn it off as the controller panel is locked in a cabinet in the room so could not be turned off. I was also on shift at the same time so know this wasnt possible for it to be turned off.
Seem to have to turn unit on and off a few times and then compressor will start.
Have checked the error logs in the service menu and E57 comes up which is for shortage of refrigerant. This error code must have been from a while ago too as the compressor run time is about 11775 hours and this error code was entered when compressor run time was at 10555 hours.
However this error code isnt flashing up on the controller and the indoor unit continues to run. Only way to see the error code is by accessing the service menu so this leads me to think that this error code is no longer valid.
How would you remove this error code from the controller? Does it have to powered on and off at the outdoor unit? Or do error codes always remain in the log?
I am confused as no error code is coming up when we turn the unit on and when you look at the controller all appears to be well.
We have had an engineer attend today but given past experience at work with our service engineers they dont do the work they are supposed to and most of the time do not check the controller or know how to check it.
Todays engineer was here 2 hours (I work nights so didnt have chance to see him) however the error code still shows up in the controller log.
Any ideas?
Thank you.