1. Electronic unit 12-24 volt
2. Battery
3. Fuse 15A-12V / 7.5A-24V
4. Converter 90-250VAC / 24VDC
5. Inner light 12/24 volt max 3 watt
Wiring diagram Cruise fridges and boxes
Wiring diagram AC/DC Conveter
Fault
Possible cause
Action
Fridge not cold.
Compressor will not start.
No power supply.
Battery in poor condition.
Faulty thermostat.
Faulty electronic unit.
Check that power is present at terminal box. check fuse. Internal light
works?
Check all terminal connections and cables.
Inspect battery charging system.
Check thermostat. Bridge T-C, if compressor starts, thermostat is faulty,
replace. If compressor does not start, probably electronic unit is faulty.
Exchange electronic unit.
Compressor makes only short start attempts.
Bad power supply, too low voltage or a voltage drop at start
attempts.
Discharged batteries.
Check cables and connections, possible verdigris, clean.
Charge batteries, run the engine or connect battery charger. Voltage shall
be above 11.0 volt at start attempts.
Compressor runs but no refrigeration generated.
Loss of refrigerant. Leakage in pipes or evaporator.
Pipes blocked.
Mount service nipple on the compressor (refrigarators). Leak test, repair
possible leak, evacuate and re-fill refrigerant.
(All this to be made by refrigeration specialist)
Compressor runs long time but not generating
enough cold.
Bad ventilation. Condenser too warm.
Fan not working.
To much frost on evaporator.
Door not closing well.
Condenser blocked by dust.
Improve ventilation for compressor.
Re-place fan.
Defrost.
Check door position and door seal.
Clean condenser.
Fault finding chart
Cable area
mm²
Gauge
Max cable length
in metres/ft 12 volt
Max cable length
in metres/ft 24 volt
2.5
12
2.5 / 8
5 / 16
4
10
4 / 13
8 / 26
6
10
6 / 19
12 / 39
Technical data
Voltage:
12/24 volt
Power consumption:
2.5 - 6 A (depending on model and compressor speed setting)
Average power consumption:
0.6 - 2.5 A (depending on model)
Freezer models; 2 - 2.5 times higher average power consumption
Compressor:
Danfoss BD35F alt. BD50F (depending on model)
Refrigerant:
R134a (filled amount written on type sticker inside fridge or outside box housing)
Fuse:
12 volt - 15 A, 24 volt - 7.5 A
Battery protection:
Cut-out at 9.6 volt (21.3), cut-in at 10.9 volt (22.7)
Isotherm refrigerators and freezers fulfills EMC directives, CE-marked
IT-61019 S. Agata Feltria (PU) - Italy
Phone +39 0541 848030
Fax +39 0541 848563
[email protected] www.indelmarine.com
www.isotherm.com
Fig. 5
Electrical connections/wiring
When connecting the fridge it is important that following points are
considered:
* Always use cables of sufficient area. The area in the following table
should be regarded as a minimum.
* Always connect the fridge directly to the battery or to the battery main
switch on the plus circuit. Do not connect it via the boats own control
panel or other diversions as this can cause a voltage drop in the power
supply. The system shall have a 15A fuse for 12 volt and a 7.5A in a 24
volt system. If a switch is fitted this should be of a minimum 20 A type.
* Connect the red cable to the positive (+) terminal and the black to
the negtive (-) terminal. Always use proper type terminals or cable
connectors of sufficient size for the cable size selected.
* Do not connect the fridge direct to a battery charger. The battery
charger must be connected to the battery.
* See wiring diagrams.
5300 NW 12th Avenue unit #2
Fort Lauderdale, FL 33309, USA
Phone: +1 954 772 8355, +1 800 422 9711,
Fax: +1 954 772 3839
[email protected] www.indelmarineusa.com
TC
1
2
3
4
5
6
1. Electronic unit 12-24 volt
2. Battery
3. Fan
4. Thermostat
5. Fuse 15A-12V / 7.5A-24V
6. Inner light max 3W
Fig. 6
000801
2 3
1
4
5
000796-4
isotherm
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+
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