Samsung ASHM070VE Service Manual page 58

7-2 Outdoor Unit Control Diagram
OUTDOOR SENSOR
PIPE SENSOR A
PIPE SENSOR B
INDOOR UNIT(A, B, C)ROOM
7-2
OUTDOOR CONTROL PCB
MICOM
• Outdoor unit data
communication
• COMP control
• Outdoor Fan control (H, L)
• MV-B,C control
• 4-Way v/v Control (A, B)
Communi
-cation
• Bypass-v/v control
circuit
• Test operation control
RESET
CIRCUIT
OSCILLATION
CIRCUIT
TRST
SWITCH
Communication
status display-
control
AC INPUT
Pulse operated Electronic
expansion valve B
Pulse operated Electronic
expansion valve C
OUTDOOR FAN(H, L)
4-WAY VALVE A
4-WAY VALVE B
DC POWER
CIRCUIT
(+5V, +12V)
BYPASS VALVE
POWER
TRANSFORMER
Samsung Electronics
COMP A
COMP B