Sanyo XH4242 / CH4242 Car Speaker User Manual


 
II - 9
SM830082
1
2
3
4
Section
5
2. Processes and functions
Fig. 10
2-7 Overload Protection (Heating)
This function prevents the air conditioner from overloading.
Chart Explanations and notes
This chart shows how the outdoor fan speed and the electronic refrigerant control valve
react to coil temperature to keep the indoor heat exchanger coil from overloading.
When sensor E2 rises above 140°F the electronic refrigerant control valve opens at 50
steps/30 seconds until E2 falls below 138°F.
Sensor E2 is located in the middle of the indoor unit heat exchange unit.
When sensor E2 rises above 144°F, the control circuit stops the outdoor fan motor till the
temp. drops to 131°F
Fuzzy control controls the electronic refrigerant control valve.
(°F)
ELECTRONIC REF.
CONTROL VALVE
INDOOR UNIT COIL
TEMP. (E2)
147
144
140
138
131
127
OUTDOOR FM
START UP
COMPENSATION
OFF
OPEN
H OR M H OR MH L
1927_THS_I
FUZZY CONTROLFUZZY CONTROL
OVERLOAD
PROTECTION OVERLOAD PROTECTION
OPEN