Carrier Supra 550 problem.

[dave.m]

A customers 550 contnues to run, even with auto stop/start selected. It is set at -25 but is reaching minus 38c!! I have fitted new battery,alternator,and return air sensor.Any ideas out there ?

[MRW]

check configs,if heat lockout selected to yes then will cool and cool,as for not shutting down check water temp sensor

[dave.m]

Have not had chance to check configs yet, but i know that at -12 and above the unit cycles between heat/cool as normal.

[abbsnowman]

MRW is right on the WT sensor. Good call buddy!

[MRW]

Thancks ABBs

[dave.m]

I have replaced WT sensor and checked configs. Unit still continues to freeze well past its set temp of -25...!!Also, has anyone had problems with leaking suction vibrasorbers, shaft seals, and 3 phase motor failures on the Supra 550 range?

[MONKEYPOWER]

Vibro,s oily , speed solenoids by the dozen, engines on supra ,450,s failing early . a problem with motors burning out ,that was more to do with customers dodgy mains supply trying to run too many units........apart from that ok.

[cadwaladr]

when you turn it off does it stop quickly? thinking of stop solenoid prob.

[dave.m]

when you turn it off does it stop quickly? thinking of stop solenoid prob.
Thanks for all your feedback, turned out to be a heat lock-out problem as suggested by abbsnowman.