Unit installation

45 312022000
Trouble RemedyProbable Cause
COMPRESSOR DOES NOT
OPERATE (CONT’D).
M. No voltage to control board. M. Check for loose or broken wiring.
Check 208/240 VAC power
transformer for 24 VAC output.
(see NOTE below).
N. Inoperable control board or
water/ice sensor PC board.
N. Replace control board.
O. Inoperable ICE SENSOR. O. Replace ICE SENSOR.
P. EVAP IN, COND OUT, or
EVAP OUT sensor is open,
shorted, or out of temperature
range.
P. Replace inoperable sensor.
Q. Hydro Boost WATER
SENSOR is shorted or open
circuit.
Q. Check for loose, broken, or
disconnected wire or plug at
pre-cool coil. Repairor replace
wire or secure plug. If Hydro
Boost WATER SENSOR is
inoperable, replace sensor.
NOTE: Confirm which sensor has failed by using the AuroraR Series System Analyzer
(P/N 309197000).
NOTE: The 208/240 VAC power transformer has an overload reset button located on its 24 VAC output
side. An overload on the transformer will cause its reset button to pop out disrupting the 24 VAC
output to the main control board. Overload button must be pressed in to restore 24 VAC output.
COMPRESSOR OPERATES
CONTINUOUSLY BUT DOES
NOT FORM SUFFICIENT ICE
BANK.
A. Cooling capacity is exceeded
by overdrawing.
A. Reduce amount of drinks drawn
per given time.
B. Standard Cooling Unit with
condenser coil and fan
assembly-- Cooling Unit
located in excessively hot area
or air circulation through
condenser coil is restricted.
B. Relocate unit or check and if
necessary, condenser coil as
instructed.
C. Remote Rooftop Condenser
Coil and Fan Assembly-- Air
circulation through condenser
coil is restricted.
C. Check and if necessary, clean
condenser coil as instructed.
D. Unit with Water-Cooled
Refrigeration--Water supply to
the refrigeration cooling coil
insufficient.
D. Restore water supply to the
refrigeration cooling coil.
E. Insufficient refrigerant charge. E. Find and repair refrigeration leak,
then replenish refrigerant charge.
F. Inoperative or disconnected
pulse-modulating expansion
valve (see REFRIGERATION
FLOW DIAGRAM).
F. Check that expansion valve is
operating by touch (should be
able to feel valve pulse).
Check for loose or disconnected
wire to solenoid coil. If necessary,
troubleshoot expansion valve with
a gage set to see if it is opening.
If expansion valve is not opening,
suction pressure will be close to
or in a vacuum.