Service manual

SiUS28-902_a

i Table of Contents

SkyAir Inverter P Series

R-410A Heat Pump 60Hz

1. Introduction .............................................................................................v

1.1 Safety Considerations for Repair ............................................................. v

1.2 Safety Considerations for Users ............................................................. vi

Part 1 General Information........................................................... 1

1. Model Names and Power Supply............................................................2

2. External Appearance ..............................................................................3

2.1 Indoor Units.............................................................................................. 3

2.2 Outdoor Units ........................................................................................... 3

Part 2 Specifications .................................................................... 4

1. Specifications..........................................................................................5

1.1 FCQ ......................................................................................................... 5

1.2 FHQ ......................................................................................................... 6

1.3 FAQ.......................................................................................................... 7

Part 3 List of Electrical and Functional Parts ............................. 8

1. List of Electrical and Functional Parts.....................................................9

1.1 Outdoor Units ........................................................................................... 9

1.2 Indoor Units............................................................................................ 10

Part 4 Refrigerant Circuit ........................................................... 11

1. Refrigerant Circuit .................................................................................12

1.1 RZQ18·24·30PVJU ................................................................................ 12

2. Functional Parts Layout ........................................................................14

2.1 RZQ18·30PVJU ..................................................................................... 14

Part 5 Function ........................................................................... 15

1. Operation Mode ....................................................................................16

2. Basic Control.........................................................................................17

2.1 Normal Operation................................................................................... 17

2.2 Compressor PI Control .......................................................................... 18

2.3 Electronic Expansion Valve PI Control .................................................. 19

2.4 Cooling Operation Fan Control ..............................................................20

3. Special Control......................................................................................21

3.1 Startup Control....................................................................................... 21

3.2 Oil Return Operation .............................................................................. 22

3.3 Defrosting Operation .............................................................................. 24

3.4 Pump-down Residual Operation ............................................................25

3.5 Restart Standby .....................................................................................26