Block Diagram - Hitachi RAM-40QH5 Service Manual

BLOCK DIAGRAM

OUTDOOR
MODEL RAM-40QH5
OUTDOOR
MODEL
Indoor Unit 1
C1
D1
Indoor Unit 2
C2
D2
RAM-40QH5
L
Magnetic relay
N
Inrush current
Protection circuit
Rotor pole position
desition detector
Peak current cut off
circuit
Overload external
judgement circuit
Voltage amplification
circuit
Over heat thermistor
Defrost thermistor
Outdoor temperature thermistor
Indoor / Outdoor
interface circuit 1
Indoor / Outdoor
interface circuit 2
Reversing valve coil
DC35V
PAM Power
circuit
Peak current
cut off
Clock
circuit
Power circuit
(For Indoor 2 P.W.B)
Power circuit
(Indoor and outdoor P.W.B)
– 25 –
Outdoor fan motor
Power module
DC compressor
motor
Electric
expansion valve