Pioneer WYC009AMFI20 Service Manual page 12

For heat pump models:
INDOOR
HEAT
EXCHANGE
(EVAPORATOR)
T2 Evaporator
temp. sensor
LIQUID SIDE
2-WAY VALVE
T1 Room temp.
sensor
GAS SIDE
3-WAY VALVE
OUTDOOR
Electronic
CAPILIARY TUBE
expansion valve
Accumulator
Compressor
10
CAPILIARY TUBE
T3 Condenser
temp. sensor
HEAT
T4 Ambient
EXCHANGE
temp. sensor
(CONDENSER)
4-WAY VALVE
T5 Discharge
temp. sensor
COOLING
HEATING