Daikin VRV IV+ Installer And User Reference Manual page 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 7-segment display
(A1P)
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
12 Technical data
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Installer and user reference guide
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