Wiring Of Inverter Ac Unit; Current Flow - Pioneer WYD-GLFI SERIES Service Manual

repairing.
The products 2P and higher are mainly developed for two generations.
st
The 1 generation (VP1) applies NEC 180° sine wave plan and indoor control.
nd
The 2 generation (VP2) applies TI DSP 180° sine wave plan and outdoor control. (Exclusive of
2P unit).
There are derivative models, e.g. full DC inverter unit, inverter floor-standing unit and LC plan.
See Appendix 1 for details.

2. Wiring of Inverter AC Unit

Transformer
Main control
board
Display circuit
board
Motor
protector
Fan Motor
Room temperature
sensor
Coil temperature
sensor

3. Current Flow

Power
supply
Main
control
board
Indoor
unit
Y/G
Or
BL
BL
Relay
Y/G
BR
Heat exchanger
Guide louver
motor
Indoor unit
Live
Neutral
Communicati
Outdoor
on wire
power
Ground
source
Or
Wh
BL
BL
Br
Br
Y/G
Y/G
4-way Valve
BL
Electric
Heater
Solenoid
Optional
valve
Or
BL
Y/G
Fan
Re
motor
BL
Note: There is no LOW FAN for single-speed motor P9-2
Outdoor unit
Live
Neutral
PFC board
IPM board
3
Re
Br
Reactor
BL
Re
BL
Re Compressor
Re Wh BL
BL
Module board
Re
Compressor top protection switch
(Optional)
Exhaust temperature sensor
Outdoor temperature sensor
Outdoor coil temperature sensor
Port: P9 pair port for dual-speed motor
Outdoor
Unit
Compressor