Point
Operation Mode
Cooling
Heating
Lo
Hi
0V
12V
0V
AC230V
0V
AC230V
Normal Heating
Defrost
7.Reversing valve control circuit.
This model reversing valve control used to control the relay ON/OFF of the reversing valve, and also
control the coil of the reversing valve ON/OFF.
The relay ON/OFF has different type when in the different operation mode.
You can see each operation mode as follows. If the reversing valve not connected or all the condition not
the same as follow, it may be something wrong with the reversing valve circuit.
HiNormal Cooling
Micon 9
pin-0V HIC 35 pin-0V
CN2 1 - CN2 4
12V 12V
HIC
35
48
8
9
Cooling/Heating
Switching relay coil
(RL1)
Reverse valve
(4-way valve)relay coil
(RL4)
Reverse valve
(4-way valve)ON
Reverse valve
(4-way valve)Cooling/Heating
switching
Cooling Lo
Heating Hi
-
95
-
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