Bunn Ultra NX Service & Repair Manual page 25

FAULT MESSAGES
User Panel
CHECK PRODUCT MIX OR DRIVE SYSTEM
Trip Condition: This message appears when the left or right torque sensor detects a fault. This can be due
to a pin problem or frozen auger.
Probable Cause: Inconsistent product mix ratio (very low brix percentage), residue build-up or too much
Krytox grease on auger motor pin, defective position sensor (torque) board.
Clear Condition: b
REFILL
Trip Condition: The Low Level Detect feature must be enabled for this message to appear.
The message will say "LOW" in place of ice/chill on the barrel that is low. Will also flash the display and put
a message on the top line "refill left/right".
Probable Cause: A pour over dispenser with product being low in the hopper or the level probe not installed
on the hopper.
Clear Condition: b
REFILL PROTECTED
Trip Condition: This message appears if the left or right liquid level was low in the hopper longer than the
Low Level To Chill timer. The Low Level to Chill feature must be enabled for this message to appear.
Probable Cause: Product low.
Clear Condition: c
REFILL FAULT
Trip Condition: This message appears if the left or right Auto Refill Time was too long (> = 3 minutes) and
could flash the hood lights.
Probable Cause: Intermittent level probe wiring between level probe and board, intermittent connection with
the jumper pin on the power board between ground terminal and negative terminal. B-i-B empty, CO supply
2
empty, defective CO pump, defective electric pump, defective proportional brix pump or internal compo-
2
nents within the brix pump needs to be sanitized.
Clear Condition: a
PSI LOW
Trip Condition: This message appears if the left or right Auto Refill Pressure is too low.
Probable Cause: Defective syrup pressure switch, syrup switch wired incorrectly (should be wired to the
normally open terminal), B-i-B empty, CO supply empty, defective CO pump, defective electric pump.
2 2
Clear Condition: b
DEFROST HEATER FAULT > CHECK PTC
Trip Condition: This message appears if the left or right PTC Heater did not see desired initial temperature
rise during Defrost.
Probable Cause: Defective PTC heater. Open wiring connection between the PTC heater and the control
board.
Clear Condition: c
DEFROST HTR > TIME TOO LONG > CHECK PTC
Trip Condition: This message appears if the left or right PTC Heater took to long to fully complete a
Defrost cycle.
Probable Cause: Defective PTC heater. Open wiring connection between the PTC heater and the
control board.
Clear Condition: c
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