– 43 –
IPM
POWER P.W.B.
N.F.
FILTER
ICP CIRCUIT
SWITCHING
POWER SUPPLY.
REVERSING VALVE
CONTROL CIRCUIT
ELECTRIC EXPANSION VALVE
CONTROL CIRCUIT
INTERFACE
CIRCUIT
A
B
C
D
MAIN P.W.B.
RECTIFIER
INVERTER
CONTROLCIRCUIT
COMPRESSOR
INVERTER
CIRCUIT
SMOOTHING
CAPACITOR
HARMONICS
IMPROVEMENT
CIRCUIT
RESET
CIRCUIT
POSSITON
DETECTIVE
CIRCUIT
MICRO
COMPUTER
FAN MOTOR
CONTROL
CIRCUIT
THERMISTOR
DETECTION
CIRCUIT
1. The electr
MODEL RAC-
10SH1
, RAC-
14SH1
ical parts for the outdoor unit is composed of two P.W.B (a power P.W.B. and main P.W.B.)
and a harmonics improvement circuit as shown in Fig. 1-1.
•
Main P.W.B.
This P.W.B. is equipped with the rectification diode, DC fan motor control circuit and the circuits
around the micro computer which take various controls.
•
POWER P.W.B.
This P.W.B. is equipped with the noise filter, ICP power circuit, interface circuit, smoothing capacitor,
expansion valve control circuit and four-way valve control circuit.
•
HARMONICS IMPROVEMENT CIRCUIT
This circuit is composed of the capacitor at the bottom of the electrical parts box and two reactors
attached to the BULKHEAD.
Fig. 1-1
