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Freightliner Refrigerator Troubleshooting Guide
750000005 (TJ18F)
750000011 (TJ22F)
750000026 (TJ18FP3)
DOMETIC CORPORATION, ENVIRONMENTAL DIVISION
P.O. Box 15299 I Richmond, VA 23227 USA
Phone +804 746 1313 | Fax +804 746 7248
www.dometic.com Page 12 of 20
Overload Protections
The compressor overload and start protection cuts off power to the compressor if the
compressor speed drops below approximately 1,900 rpm, or if this motor speed is not
reached during the start sequence. Possible reasons for overload protection activating could
be too high refrigeration system pressures during operation or lack of pressure equalizing at
start.
The fan overload protection stops the compressor if the fan current exceeds 0.5 A (avg) or 1
A (peak).
An overheating of the electronic unit heat sink will cause the compressor to stop. Restart
will occur automatically when a normal temperature has been reached. If a fan is installed,
it will continue to run when the compressor stops due to overload or electronic unit
overheating.
Voltage Protection
If a voltage outside any concerned range is applied to the electonic unit, the compressor
does not start, or it stops if the voltage limit is exceeded during operation. The compressor
will restart automatically approximately 1 minute after the supply voltage has reached the
reset voltage within the range in question.
Battery protection
The Danfoss electronic unit provides protection as follows:
Standared Battery Protection Settings
12V cut-out 12V cut-in
10.4 11.7
Final Installation Notes
For all appliances, AVOID the use of any electrical adapters or extension cords.
After installation, allow the appliance to sit for at least one hour before starting.
The manufacturer assumes no responsibility for any injuries or damage caused by
noncompliance with any of the installation regulations.