Haier SYJS-0308 Service Manual page 33

3.2.2 Cooling system of indoor unit
(take single system connected with 3 sets of AS092FMAHA as an example)
Electronic expansion valve
Liquid pipe sensor
Indoor heat exchanger
Gas pipe sensor
3.2.3 The function of all kinds of heat sensitive resisters and pressure switch
(1) Outdoor unit
A. Outdoor ambient temperature heat sensitive resister: according to the outdoor ambient
temperature to limit the max operation frequency and control the rotating speed of fan
motor; when heating and defrosting, determine to use stop-unit-defrosting or non-stop-
unit-defrosting mode.
B. Discharging air temperature heat sensitive resister of compressor: used to prevent the
discharging air temperature of compressor from too high.
Suction air temperature heat sensitive resister of compressor, evaporation temperature heat
sensitive resister: when heating, as the ground to control the electronic expansion valve
from over heat.
C. Defrosting temperature heat sensitive resister: control the rotate speed of outdoor fan