Sub-Zero 400 Series Information Booklet page 71

700-2 SERIES (Tall Units)
CODE INDICATION
05 Ref. cabinet therm. read open, short or erratic temp for 10+ sec's
06 Ref. evap. therm. read open, short or erratic temp for 10+ sec's
07 Fre. cabinet therm. read open, short or erratic temp for 10+ sec's
08 Fre. evap. therm. read open, short or erratic temp for 10+ sec's
20 Defrost underheat & no feedback thru Gr/Wh wire at defrst start
21 Defrost overheat
22 No feedback thru Gr/Wh wire at defrost start
23 Defrost overheat & no feedback thru Gr/Wh wire at defrost start
24 Defrost underheat
80 High VS compressor differential pressures or low voltage sup-
plied to VS compressor
81 High Amperage Draw at VS compressor
82 VS comp. couldn't maintain min. speed at highest current draw
83 Locked VS compressor Rotor
84 Short circuit at VS compressor controller output circuit
85 VS compressor inverter overheated & shut down VS compressor
86 Serial communication failure between VS compressor controller
and electronic control board
87 Speed information from electronic control board is out of spec.
88 Electronic control board not receiving status data in response to
speed commands
NOTE: VS Compressor = Variable Speed Compressor
Error Code Table
PAGE 71
Starting W/ Serial #1759163