Service Manual

Outdoor Unit SiUS181631EA
22 Printed Circuit Board Connector Wiring Diagram
1. Outdoor Unit
1.1 RMXS48LVJU
Main PCB (A1P)
1) X5A Connector to service PCB (A2P)
2) X11A Connector for outdoor temperature thermistor
3) X12A Connector for thermistors
(suction pipe 1, suction pipe 2, outdoor heat exchanger,
discharge pipe)
4) X13A Connector for thermistors (subcooling outlet, liquid pipe)
5) X17A Connector for high pressure sensor
6) X18A Connector for low pressure sensor
7) X21A Connector for electronic expansion valve coil (main)
8) X22A Connector for electronic expansion valve coil (subcooling)
9) X25A Connector for solenoid valve coil (four way valve)
10)X26A Connector for solenoid valve coil (hot gas bypass valve)
11)X27A Connector for solenoid valve coil (unloading)
12)X28A Connector for crankcase heater
13)X32A Connector for high pressure switch
14)X37A Connector for power supply for optional PCB (16 VDC)
15)X66A Connector for cool/heat selector PCB (A4P)
16)X81A Connector for terminal strip (inter-unit wiring)
17)X106A Connector for DC fan motor (upper)
18)X107A Connector for DC fan motor (lower)
19)X111A Connector for radiation fin thermistor
20)LD, LE Connector for reactor
21)LC, NC Terminal for noise filter PCB (A3P)
22)P Connector for capacitor C4 +
23)N Connector for capacitor C4 –
24)U, V, W Connector for compressor
25)F4U Fuse (6.3 A / 250 V)
26)F6U Fuse (5.0 A / 250 V)
27)HAP Operation pilot lamp (LED for service monitor: green)
28)HBP Inverter pilot lamp (LED for service monitor: green)