Service manual

ESIE03–01 Additional Checks for Troubleshooting

Part 3 – Troubleshooting 3–71

Part 3

5 Additional Checks for Troubleshooting

5.1 What Is in This Chapter?

Introduction This chapter explains how you must check the units to carry out troubleshooting correctly.

Overview This chapter contains the following topics:

Topic See page

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