517798
7
Thermistor Sensors Resistance Table
Temperature (ºC)
Resistance
(K Ω ± 5%)
-30.0 25.17
-25.0 19.43
-20.0 15.13
-15.0 11.88
-10.0 9.392
-5.0 7.481
0.0 6.000
5.0 4.844
10.0 3.935
15.0 3.217
20.0 2.644
25.0 2.186
30.0 1.817
35.0 1.518
40.0 1.274
45.0 1.075
50.0 0.9106
2.4 Beeper/Alarm
This is a piezo electric device located in the control module to provide the user with feedback on
fault alarms. If a fault occurs or the door is left open, the alarm will sound. It will repeat the fault
alarm each time the door is opened.
2.5 Defrost Heater
A 230/240v 260 watt (E150/210), 450 watt (E308/388) defrost heater is positioned beneath and
around the evaporator and is used to defrost the evaporator.
There are two thermal fuses mounted in the wiring harness of the defrost element, having a
tripping temperature of 72ºC. Once open circuit they cannot be reset. The thermal fuses are part
of the element heater assembly.
These fuses in both leads of the element protect the refrigerator from any overheating through
failure of the defrost element itself or a failure in the control module. Both sides are protected in
case polarity is reversed.
NOTE: Care should be taken if manually defrosting the evaporator using heat guns to ensure that
the thermal fuses are not over heated.
In normal conditions the defrost period is terminated by the control module when the defrost sensor
reaches +8º C.
2.6 FC Fan
The FC fan is a Shaded Pole Motor. The fan cycles with the compressor, however turns off if the
door is opened. A further feature added into the electronic software energises the fan during the
off cycle should the compressor run time fall below 25%. This feature will aid in preventing the unit
from short cycling during low ambients.
2.7 Door Reed Switch
The door reed switch is located on the bottom cross rail and is activated by a magnet located in the
door.
To Next Page
Loading...
