Scotsman BC0530 Service Manual page 22

BC0530 Service Manual
CODE: FAULT CODE INDICATES:
3 (Rev 1.3)
Freeze time exceeds 45 min.
three times consecutively.
Code 3 will flash when a
cycle lasts longer than 35
minutes 3 will start flashing
when the plate opens. If
there are 3 consecutive
cycles over 35 minutes the
fault 3 will go solid and lock
out.
4 (Rev 1.1/1.2/1.3)
Freeze time less than 5 min.,
for 3 consecutive times.
After the 6th attempt it will
lock out.
(Water level in the glass
Probe Tube is prematurely
falling below the low-level
probe during the first 5
minutes of the freeze cycle,
or, the Low-level probe
circuit is open.)
POSSIBLE CAUSE:
Not enough air or liquid flow
through condenser.
Low-level (harvest) probe shorted
or touching side of glass tube.
Inoperative water pump.
Refrigeration problem.
Bad Contactor (Compressor would
be off!)
Inlet Water Valve stuck open. Water
Tank will be overflowing.
Controller not shutting off Water
Valve.
Hot Gas Valve (HGV) stuck partially
open, or with a liquid-cooled
compressor, HGV stuck fully open,
but Evaporator never gets hot
enough (>120F) to give an Error
Code 10.
Slushing, in Pump, water lines
or Water Tank, due to Expansion
Valve mis-adjustment or not being
wrapped in insulating foam, or
failure.
Low-level Probe circuit is open, or
the Water-level Probe Assembly is
bad.
Water is being lost somewhere
(leaking), causing premature
harvest to occur.
During harvest, Evaporator Probe
out of adjustment (too Warm).
High-level Probe possibly short
circuiting during fill, causing short
fill and hollow cubes.
March 2020
Page 22
SOLUTION:
Reset high-pressure safety, if tripped.
Clean the condenser, on air-cooled
units. Check water/coolant supply, on
liquid-cooled units.
Check/repair shorted wiring to this
probe, or gently move probe away
from glass surface. Make sure probe
is not pushed up/down out of vertical
adjustment when moving it away from
glass.
Unplug the pump and confirm the
impeller is not jammed with foreign
material. Put machine in Wash Mode
& check voltage at pump-cable
connector. On the Controller Board's
AC output bus, check wires P5-2
and P5-6, during Wash Mode, for
line voltage. If rated line voltage is
present, and the pump's impeller is
not obstructed, replace faulty Water
Pump.
Check for low refrigerant charge.
Replace Contactor.
Replace Water Valve.
Replace Controller.
Replace Hot Gas Valve.
Ensure Expansion Valve (TXV) is
covered with insulating foam, Adjust
TXV as needed. As a starting point,
gently turn the TXV in CW direction
until it stops, then turn it CCW 5-1/2
turns. Adjust in ¼ turn increments
as needed.
Repair wiring to Low-level Probe or
replace Probe assembly.
Inspect hoses, water tank, water
pumps, water plate and water
level probe assembly to locate
leak, repair or replace bad part as
needed.
Adjust colder (CW).
Locate & repair short circuit.