Temperzone / Package Unit is Out On High Pressure Lockout

While on-site for a maintenance I found this Temperzone Package Unit was locked out due to multiple high pressure faults. I was also told another unit that felt like it wasn’t maintaining space temperature, especially on the hotter days.
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[@briannem.6787]

I've been watching the "HVACR VIDEOS" channel, but I wanted to see more local content- America does things way differently to what I'm used to. I found your channel after a bit of looking. This video's great! It's got everything I love about the videos I've been watching so far!
I just find those package units very interesting for some reason. I don't know. I doubt I'd become a HVAC technician (being on the roof on a 35 degree day would be too much for me, I dehydrate easily) but I have great respect for you, climbing onto the metal roof in uncomfortably hot conditions to ensure other's comfort.

[@hvacraustralia]

Thanks mate, always nice to hear people are enjoying the videos.
Package units are nice to work on with all components being right there for you. Bit easier than other types haha.
It’s the joys of being a HVACR tech, you’re outside in summer while the unit is rejecting heat, and outside in winter when it’s removing heat from the ambient air haha.

[@joelmcdermott7129]

FWIW if you ever got bored and decided to pick up a copy of the AIRAH tech manual it has a table of W/m2 rates for various space types. E.g. an internal office area with no external walls I recall being around 100W/m2, so that unit being below that is an indicator it is undersized based on your calc at 150w/m2.

[@hvacraustralia]

Thanks for the tip mate! Appreciate it. I’ll go have a read. I know it’s a basic calculation but still comes in handy from time to time.

[@prashanshan7125]

Good job..!

[@hvacraustralia]

Thanks mate 🤙

[@Noypihvac]

Most probably intermittent hp fail due to orifice in the condenser as what observe with temperzone heatpump or most aussie unit causing system to run with high comdensing temp.

[@hvacraustralia]

I’ll have a look into that when I go back. Cheers.

[@Thermoelectric7]

How's the air balance on the factory? If there's too much outside air it would struggle during the day. Looked like it had outside air/economiser dampers on it. Should be able to stand at a door inside/outside and feel if it's blowing cold air out or warm air is being sucked in when you crack the door slightly.
Looks like that damper was closed, but still probably worth checking.

[@hvacraustralia]

Air balance is good, the O/A dampeners were closed. I was checking throughout the day just to see if they opened randomly but didn’t see anything funky.
I’ll be back there again in a week or so.

[@Thermoelectric7]

@@hvacraustralia All over it! Good man.
My current gig is a sparky in a refrigerated warehouse. The things I see here... So many places they piss away energy with simple stuff like that, it's nuts.

[@hvacraustralia]

I have the benefit of knowing about this issue for a while 😂
It’s amazing how many place waste so much unnecessary energy though!

[@c21meister]

Temperzones look like carrier and Aaon had baby and that was the end result