2. Processes and functions
1
2
3
4
5
II - 9
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 60°C the electronic refrigerant control valve opens at 50 steps/
30 seconds until E2 falls below 59°C.
❑
Sensor E2 is located in the middle of the indoor unit heat exchange unit.
❑
When sensor E2 rises above 62°C, the control circuit stops the outdoor fan motor till the
temp. drops to 55°C
❑
Fuzzy control controls the electronic refrigerant control valve.
Fig. 10
2-7
Overload Protection (Heating)
This function prevents the air conditioner from overloading.
(
°
C)
ELECTRONIC
EXPANSION VALVE
INDOOR UNIT COIL
TEMP. (E2)
64
61
60
59
55
53
OUTDOOR FM
START UP
COMPENSATION
OFF
OPEN
H or M
H
L
1565_M_S
FUZZY CONTROL
FUZZY CONTROL
OVERLOAD
PROTECTION
OVERLOAD PROTECTION
OPEN
H or M
