Freightliner Refrigerator Troubleshooting Guide
750000005 (TJ18F)
750000011 (TJ22F)
750000026 (TJ18FP3)
D. The Refrigerant Circuit
1.If the refrigerator seems to be running properly and passes all of the above tests and there is no cooling in the unit then the problem may be a refrigerant leak.
2.Do not attempt to charge unit in field. Contact your service dealer or Dometic Corporation at
ELECTRICAL CONNECTION
Before connecting the appliance to the power supply, check that the line voltage corresponds to the indications on the appliance rating plate and those of the compressor plate. This appliance complies with the EC directive 89/336 governing radio suppression.
DC Wiring
For Direct Current (DC) refrigerators, connect the appliance to the DC distribution center. A circuit breaker of 15 Amps (maximum) must be used if the system is 12VDC. Make sure that proper polarity is maintained at all times. Check that all grounding systems are in good working order. The appliance must be wired and grounded in accordance with the Electrical Wiring Guidelines in this manual.
DANFOSS Compressor Data
Voltage Range
12V systems: From 10.4V to 17V
The electrical unit will calibrate automatically to the applied voltage. This means that if the battery voltage is less than 17V, the electronic unit assumes that it is working in a 12V system. If the voltage is higher than 17V, the electronic unit assumes that it is working in a 24V system. However, the compressor does not run at power supply voltages between 17V and 22.8V, the desired battery protection
Protection Systems
The Danfoss compressor protection system facilitates protection against compressor overload and start failure, fan overload and electronic unit overheating as well as destructive battery discharge. When an overload protection is activated, the compressor enters a cycle in which it makes start attempts at approximately 60 second intervals until a successful start is achieved.
DOMETIC CORPORATION, ENVIRONMENTAL DIVISION |
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P.O. Box 15299 I Richmond, VA 23227 USA |
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Phone +804 746 1313 Fax +804 746 7248 |
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www.dometic.com | Page 11 of 20 |