20 Technical data
Installation and operation manual
48
REYQ8~20+REMQ5U7Y1B
VRV IV+ heat recovery
4P546222-1B – 2020.10
Charge port / Service port
Stop valve
Filter
Check valve
Pressure relief valve
Thermistor
Solenoid valve
Heat sink (PCB)
Capillary tube
Expansion valve
4‑way valve
Propeller fan
High pressure switch
Low pressure sensor
High pressure sensor
Oil separator
Accumulator
Heat exchanger
Compressor
Double tube heat exchanger
Distributor
Liquid receiver
20.3
Wiring diagram: Outdoor unit
Refer to the wiring diagram sticker on the unit. The abbreviations
used are listed below:
INFORMATION
The wiring diagram on the outdoor unit is only for the
outdoor unit. For the indoor unit or optional electrical
components, refer to the wiring diagram of the indoor unit.
1
This wiring diagram applies only to the outdoor unit.
2
Symbols (see below).
3
For connection wiring to indoor–outdoor transmission F1‑F2,
outdoor‑outdoor transmission F1‑F2, outdoor‑multi
transmission Q1‑Q2, refer to the installation manual.
4
How to use BS1~BS3 switch, refer to the "Service
Precaution" label on the electrical component box cover.
5
When operating, do NOT short-circuit the protection devices
(S1PH, S2PH (for 14~20 HP only)).
6
For 5~12 HP: When using the optional accessory, refer to the
installation manual of the optional accessory.
6
For 14~20 HP: connector X1A (M2F is red, connector X2A
(M2F) is white.
7
For 5~12 HP: Colours (see below).
7
For 14~20 HP: When using the optional accessory, refer to
the installation manual of the optional accessory.
8
For 14~20 HP: Colours (see below).
Symbols:
Field wiring
Terminal block
Connector
Terminal
Protective earth
Noiseless earth
Earth wiring
Field supply
PCB
Switch box
Option
Colours:
BLK
Black
RED
Red
BLU
Blue
WHT
White
GRN
Green
Legend for wiring diagram 5~12 HP:
A1P
Printed circuit board (main)
A2P
Printed circuit board (noise filter)
A3P
Printed circuit board (inverter)
A4P
Printed circuit board (fan)
A5P
Printed circuit board (sub)
BS1~BS3 (A1P) Push button switch (MODE, SET, RETURN)
C* (A3P)
Capacitor
DS1, DS2
(A1P)
DIP switch
E1HC
Crankcase heater
E3H
Drain pan heater (option)
F1U, F2U (A1P) Fuse (T 3.15 A / 250 V)
F3U
Field fuse
F101U (A4P)
Fuse
F401U, F403U
(A2P)
Fuse
F601U, (A3P)
Fuse
HAP (A*P)
Pilot lamp (service monitor is green)
K3R (A1P)
Magnetic relay (Y11S)
K6R (A1P)
Magnetic relay (E3H)
K7R (A1P)
Magnetic relay (E1HC)
K9R (A1P)
Magnetic relay (Y3S)
K11R (A1P)
Magnetic relay (Y2S )
K12R (A1P)
Magnetic relay (Y4S)
K13R (A1P)
Magnetic relay (Y5S)
L1R
Reactor
M1C
Motor (compressor)
M1F
Motor (fan)
PS (A1P, A3P,
A5P)
Switching power supply
Q1DI
Earth leakage circuit breaker
