Thetford DE0251T Series-DE - Manual (Page 4)

4
Over Heating Shut-off Device Operation (DE0240T & DE0251T)
Operating the refrigerator in high ambient temperatures can over heat the cooling unit and
cause premature failure of the compressor. (See the label inside the refrigerator.)
To protect the cooling unit from over heating, the refrigerator will automatically shut-off when
the vehicle air temperature is higher than approximately 130° F. If shut off occurs, an
audible alarm tone (an intermittent beeping) operates from the refrigerator.
To stop the audible alarm tone and restart the refrigerator, turn the thermostat counterclock-
wise to the “OFF” position and then clockwise to the desired thermostat position.
The refrigerator will not restart until the air temperature is lower than approximately
130° F.
Protection System
Your refrigerator has an over current protection system in the electronic circuit to
prevent damage to the inverter which may occur due to a reverse polarity connection.
If the refrigerator does not operate and the green power light does not come on, check
the fuse, which is located on the side of the inverter case, and the polarity of the DC
power supply. If the refrigerator still does not operate, another problem can exist in
the inverter. Have an authorized Norcold Service Center check the refrigerator.
Cleaning and Defrosting
Defrosting
It is normal for frost to collect on the freezer plate inside the refrigerator. Excess frost
decreases the cooling performance of the refrigerator. Defrost the refrigerator as neces-
sary.
CAUTION: Do not use sharp objects, a hair dryer, a heat gun, etc. to defrost the
refrigerator. Damage to the interior of the refrigerator can occur.
- Turn the thermostat to “OFF”.
- Remove all food from the refrigerator.
NOTE: Defrosting the refrigerator makes excess water inside the refrigerator.
- Put dry towels (etc.) inside the refrigerator to absorb the excess water.
- Put trays of hot water in the freezer until the frost is melted.