Wine Guardian TTW018 Installation, Operation And Maintenance Manual page 39

!3 = Defrost Sensor
Fault
!4 = Communication
loss
Only one Unit can be set up at a time. Ensure
other units are unplugged while pairing a
unit to ensure there are no communication
issues between Wine Guardian Units
39
!WARNING!
THE SYSTEM REMAINS
OPERATIONAL DURING THIS
ALARM
Defrost sensor has been shorted,
disconnected or open.
(!3) will remain on screen until the
defrost sensor issue has been resolved.
THE SYSTEM REMAINS
OPERATIONAL DURING THIS
ALARM
Bad or no data transfer between sensing
device and main control board.
"!4" will remain on screen until
communication is re-established.