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L-2448B Operation
This section of the manual refers to essential safe
operation for all Dometic ice makers. For any opera-
tional problems, call your dealer, or our service depart-
ment at 804-746-1313.
Start-up Check List
A) Before you start the system
• Check that all refrigerant connections are tightened
per installation manual
• Check to make sure that all refrigerant lines are
secured so as not to rub against other objects
during operation
• Ensure that all portions of the suction line,
including connections, are insulated to prevent
ice build-up
• Confirm that electrical connections are correct and
tight.
• Make sure that the ice level sensor is mounted
securely and the cable is routed safely.
• Make sure that all units are mounted securely.
• Check seawater connections to make sure that
they have correct flow direction, and that all
connections are tight.
• Confirm that all metallic parts are bonded correctly
• Make sure there are no loops or dips in the
seawater system
• Confirm that frequently accessed parts are acces-
sible i.e. control box, constant pressure valve,
refrigerant ports, etc.
• Check ice delivery hose for insulation, air hole,
and drain hole, if required. Make sure that the hose
is securely fastened.
B) Starting the system
• Turn on the designated circuit breaker for the unit,
and also the one for the pump if it is on a sepa-
rate breaker at the boat’s electrical panel
• Open the seacock on the pump intake
• Turn the switch on the ice maker unit to ‘ON’
• When the unit starts (after the two minute delay)
watch the sightglass for flowing refrigerant
• Check the sightglass after 15 minutes to make
sure that the indicator inside shows green (no
moisture)
• Confirm that water is flowing through the overboard
discharge
OPERATION
• Watch for ice within five minutes of starting, plus
approximately one minute for each foot of hose
between the box and auger unit
NOTE: The seawater pump should cycle automatically
whenever the unit is running. Regularly check for
seawater flow by observing the overboard discharge. If
you do not observe any flow when the system is
running, check for obstructions in the seawater cooling
system.
C) Control Operation
• The control system works off pre-programmed logic
to operate the condensing unit and auger unit
within the assigned parameters. The logic uses
sensors, timers, and counters to protect system
components from failure due to loss of freshwater,
loss of seawater, ice clogs, low refrigerant, or
auger motor start failures. It also controls system
operation based on ice bin level.
• Input and output starts at the control panel. The
panel contains the system on/off switch, system
running indicator light, pressure fault light, ice clog
failure light, and the freshwater feed failure light.
These indicators help determine system function,
and failure mode, if one occurs.
• System failures that result in sustained shutdown,
as indicated by one of the red failure lights on the
control panel, can be reset with the Reset switch
on the control box at the condensing unit. If the
Reset switch needs to be used, it is a good
indication of an actual problem, not just a passing
event.
• Required events for sustained shutdown (in need of
Reset switch operation)
1) High pressure switch operation of three (3)
times within 45 minutes.
2) Low pressure switch operation of six (6) times
within 45 minutes.
3) Freshwater feed fault each time level the fault
occurs.
4) Ice clog indicator switch on ice discharge
nozzle each time the fault occurs.
5) Auger motor start error each time the fault
occurs.
NOTE: If system needs to be reset more than twice
within one day, please have the system serviced.