Service manual

ESIE03–01

vi Table of Contents

5 Additional Checks for Troubleshooting

5.1 What Is in This Chapter? ......................................................................... 3–71

5.2 Indoor Unit: Checking the Fan Motor Hall IC........................................... 3–72

5.3 Indoor Unit: Checking the Power Supply Wave Form.............................. 3–73

5.4 Outdoor Unit: Checking the Refrigerant System...................................... 3–74

5.5 Outdoor unit: Checking the Installation Condition.................................... 3–75

5.6 Outdoor Unit: Checking the Discharge Pressure..................................... 3–76

5.7 Outdoor Unit: Checking the Expansion Valve.......................................... 3–77

5.8 Checking the Thermistors........................................................................ 3–78

5.9 R1T and R2T ........................................................................................... 3–79

5.10 R3T.......................................................................................................... 3–80

5.11 Evaluation of abnormal high pressure ..................................................... 3–81

5.12 Evaluation of abnormal low pressure....................................................... 3–82

5.13 Check for Clogged Points........................................................................ 3–83

Part 4

Commissioning and Test Run

1 Pre-Test Run Checks

1.1 What Is in This Chapter? ......................................................................... 4–3

1.2 Test Run Checks ..................................................................................... 4–4

1.3 Setting the Wireless Remote Controller................................................... 4–5

2 Field settings

2.1 What Is in This Chapter? ......................................................................... 4–9

2.2 How to Change the Field Settings with the Wired Remote Controller ..... 4–10

2.3 How to Change the Field Settings with the Wireless Remote Controller. 4–12

2.4 Overview of the Field Settings of the Indoor Units................................... 4–13

2.5 Overview of the Factory Settings of the Indoor Units............................... 4–14

2.6 Setting the Ceiling Height ........................................................................ 4–15

2.7 Setting the Filter Counter......................................................................... 4–16

2.8 MAIN/SUB Setting when Using Two Remote Controllers........................ 4–17

2.9 Setting the Centralized Group No............................................................ 4–18

2.10 Field settings when using a spare part PCB of Sky-Air L-series

outdoor unit.............................................................................................. 4–20

2.11 The Field Setting Levels .......................................................................... 4–23

2.12 Overview of the Field Settings: R(Y)P71-125L........................................ 4–26

2.13 Jumpers................................................................................................... 4–28

2.14 DIP switch DS1........................................................................................ 4–29

2.15 DIP switch DS2........................................................................................ 4–30