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Technical data
Installer and user reference guide
133
RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ heat pump
4P546228-1A – 2019.10
R6T
Thermistor (heat exchanger, gas pipe)
R7T
Thermistor (heat exchanger, de-icer)
R8T
Thermistor (M1C body)
R21T
Thermistor (M1C discharge)
S1NPH
Pressure sensor (high)
S1NPL
Pressure sensor (low)
S1PH
Pressure switch (discharge)
SEG1~SEG3
(A1P)
7-segment display
T1A
Current sensor
V1D (A3P)
Diode
V1R (A3P, A4P) Power module
X*A
Connector
X1M (A1P)
Terminal block (control)
X1M (A5P)
Terminal block (power supply)(option)
Y1E
Electronic expansion valve (main)
Y2E
Electronic expansion valve (sub‑cool)
Y3E
Electronic expansion valve (liquid cooling)
Y4E
Electronic expansion valve (storage vessel)
Y1S
Solenoid valve (main)
Y2S
Solenoid valve (accumulator oil return)
Y3S
Solenoid valve (oil 1)
Y5S
Solenoid valve (subcool)
Z*C
Noise filter (ferrite core)
Z*F (A2P, A5P) Noise filter (with surge absorber)
Connectors for optional accessories:
X10A
Connector (drainpan heater)
X37A
Connector (power adapter)
X66A
Connector (remote switching COOL/HEAT selector)
Legend for wiring diagram 14~20 HP:
A1P
Printed circuit board (main)
A2P, A5P
Printed circuit board (noise filter)
A3P, A6P
Printed circuit board (inverter)
A4P, A7P
Printed circuit board (fan)
A8P
Printed circuit board (ABC I/P) (option)
BS1~BS3 (A1P) Push button switch (MODE, SET, RETURN)
C* (A3P, A6P)
Capacitor
Summary of Contents for VRV IV+
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