Block Diagram; Outdoor Unit - Hitachi RAM-60QH4 Manuel De Service

BLOCK DIAGRAM

MODEL RAM-60QH4
Indoor Unit 1
C1
D1
Indoor Unit 2
C2
D2
Power source
1φ50Hz,
230V
L
Magnetic relay
N
Inrush current
protection circuit
Rotor pole
position 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

Outdoor Unit

FM Outdoor fan motor
PAM Power
circuit
Peak current
cut off
Clock
circuit
Power circuit
(P.W.B)
Power circuit
(Indoor and outdoor P.W.B)
– 38 –
Power module
DC compressor
motor
Electric
expansion valve
M
M