AAON RQ SERIES, Manual

3 

Index of Tables and Figures 

Tables: 

Table 1 - Troubleshooting 

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 Fault and Protection ........................................................................ 14

Table 2 - Communication Connector Pin Definition .................................................................... 18

Table 3 - Sensor Connector Pin Definition ................................................................................... 18

Table 4 - Ramp Up Procedure ...................................................................................................... 19

Table 5 - Ramp Down Sequence .................................................................................................. 19

Table 6 - Input Current Foldback.................................................................................................. 20

Table 7 - Output Current Foldback ............................................................................................... 20

Table 8 - Inverter Temperature Feedback ..................................................................................... 20

Table 9 - USHX and Wiring Harness Pin Assignments ............................................................... 23

Figures:  

Figure 1 

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 Variable Speed Scroll Design Features ....................................................................... 10

Figure 2 

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 Motor Winding Diagram ............................................................................................. 10

Figure 3- Electronics Nomenclature ............................................................................................. 16

Figure 4 - U.S. Drive Model Wiring Diagram .............................................................................. 17

Figure 5 - U.S. Wiring Diagram ................................................................................................... 17

Figure 6 - WattMaster VCC-X Controller and Refrigeration System Control Module ............... 21

Figure 7 - Modular Silicon Expansion Valve ............................................................................... 22

Figure 8 - USHX ........................................................................................................................... 22

Figure 9 - USHZ Wiring Harness ................................................................................................. 22

Figure 10 - MSEV and USHC installation schematic .................................................................. 24

Figure 11 - MSEV installation orientation.................................................................................... 25

Figure 12 - USHX installation orientation on a horizontal copper line ........................................ 26

Figure 13 - USHX installation orientation on vertical copper line ............................................... 26

Figure 14 - Brazed access fitting .................................................................................................. 26

Figure 15 - Installed USHX with attached 10-pin wiring harness ................................................ 27

Figure 16 - Thermistor installation at evaporator outlet ............................................................... 27

Figure 17 - Insulation secured to the thermistor ........................................................................... 28

Figure 18 - Class 2 DC and AC power sources ............................................................................ 29

Figure 19 - Single USHC-MSEV or single USHS wiring diagram .............................................. 30

Figure 20 - USHX-to-RS485 converter connection ...................................................................... 31

Figure 21 - MSEV electrical connections ..................................................................................... 31

V83980 

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 Rev. A 

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170111