System Heat Pump Outdoor Unit - MegaFrio

Group Number Setting for Indoor Units
Terminal block of outdoor unit
C
Central controller
D
Vcc
12V
GND
GND
Indoor unit
A B
C
D
Simple central Controller
Electrical Wiring
➀ Confirm the power of whole system(indoor unit, outdoor unit) is OFF, otherwise turn off.
➁ The transmission lines connected to C, D of simple central controller should be connected to C,D terminal port
for central control of outdoor unit with care for their polarity.(C ➔ C, D ➔ D)
➂ DC power line(12V) and ground line should be connected to terminal block of adjacent indoor unit.
➃ Set group number with increasing the rotary switch from 00 to 7F in orderly manner. (if it is desired to control
several indoor units as a group, each group control is possible by group ID rotary switch setting from 0 to 7)
➄ The whole system power turns on.
• Group number of each indoor unit is set with rotary switch of control PCB in each indoor unit.
• Before power is supplied, the rotary switch for simple central controller on the indoor unit PCB should be set.
• ID Mapping of Rotary Switch is following table.
Each rotary switch setting in Indoor
SW01M(GROUP) SW02M(UNIT)
Simple central controller recognition
0 0~F
1
1 0~F
2 0~F
3 0~F
4 0~F
5 0~F
6 0~F
st Group, 0~F Unit
2ndGroup, 0~F Unit
3rdGroup, 0~F Unit
4thGroup, 0~F Unit
5thGroup, 0~F Unit
6thGroup, 0~F Unit
7thGroup, 0~F Unit
7 0~F 8thGroup, 0~F Unit
Installation Manual 41
ENGLISH