Airedale UCCU70SQ-2/1 will not run

[Kirky]

Hi all,

Been called to a airedale UCCU70SQ-2/1 on 407c which will not start. There isn't any active alarms. The indoor temperature is high enough to call for cooling but nothing. On startup the compressor contactor goes in and out right away then the unit does nothing. I've checked the alarm log and there is a historic trip diff pressure C1 and low differential pressure both from last month. I've checked the sensor pressures which read the same as my gauges. Any thoughts welcome

[Grizzly]

Hi Kirky.
sorry about the delay.
I assume you reset the alarms.
its been a while since I last posted any links. Hopefully they work?

https://www.mediafire.com/file/xqwavdrqzyjl9qv/TM_ULTIMA_UCC30-450_6259543_V1.11.0_11_2016.pdf/file
https://www.mediafire.com/file/wmmk5uj8w8dgjz0/TM_ULTIMA_UCC30-450_6259543_V1.11.0_11_2016a.pdf/file
https://www.mediafire.com/file/3u294asw36yhn3i/UCC_Controls.pdf/file
Regards Grizzly.

[Grizzly]

Hi Guys. Its possible that I have added the same link twice. Whereas I intended to show the end 2 pages of the Manual where the Circuit terminals are shown. (For Fault finding)
The same with the controls Manual where it shows the diff pressure C1 fault and describes what it means.
Have you tried selecting the second comp as Lead Kirky. Which may well ignore the comp 1 fault and run comp 2?
Maybe its better to have the whole manual anyways!
Good luck Grizzly