Daikin EWWQ-AJYNN, Service Manual

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ESIE07-05 Functional Control
Part 2 – Functional Description 2–47
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Part 2
2 Functional Control
2.1 What Is In This Chapter?
Introduction This chapter will give more detailed information about the functions used to control the system.
Understanding these functions is vital when diagnosing a malfunction, which is related to functional
control.
Overview This chapter contains the following topics:
Topic See page
2.2–ON / OFF Management 2–48
2.3–Thermostat Control 2–49
2.4–Setpoint Reset of the Chilled Water 2–54
2.5–Return Water Reset 2–56
2.6–Freeze-up Control 2–57
2.7–Enable Soft Load 2–59
2.8–Unit Load Limiting 2–60
2.9–Start Up With High Evaporator Water Temperature 2–61
2.10–Pump Control 2–62
2.11–Auto Restart after Power Failure Function 2–63
2.12–Liquid Injection 2–64
2.13–EXV Pre Opening 2–65
2.14–Compressor Configuration 2–66
2.15–Compressor Management 2–67
2.16–High Pressure Setback 2–69
2.17–LP Prevention 2–70
2.18–Capacity Control 2–71
2.19–Pump Down Configuration at Compressor Stop 2–74
2.20–Pressure Safeties 2–75
2.21–LP alarm delay 2–77
2.22–Oil Management Safeties 2–78
ESIE07-05.book Page 47 Friday, December 21, 2007 3:21 PM