View Full Version : System ck on carrier maxima 1000

23-11-2015, 09:53 PM
Any one any ideas why unit randomly shutting down on electric stby " system ck " comes on screen. Charge rate ok. Sensor fault. Any help or guidance much appreciated

24-11-2015, 06:23 AM
Usually system ck is caused by suction pressure reading in the negatives for five minutes. Corrosion in the wiring / plug or bad transducer can cause an intermittent code. Could also be discharge air sensor reading higher than return air in cool.

24-11-2015, 11:09 AM
Call up the suction pressure on the screen and watch it if it goes negative it will shut down I take it that it's defrosting enough for its load requirements.

25-11-2015, 10:53 PM
Cheers guys mainly work on Thermo King will check sensors