Daikin ERQ, Service Manual

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ESIE09-05
Table of Contents i
1. Introduction .............................................................................................i
1.1 Safety Cautions .........................................................................................i
Part 1 General Information ............................................................1
1. Model Names of Outdoor Units, Control Box and Expansion Valve Kit ..2
1.1 Outdoor Units ...........................................................................................2
1.2 Control Box...............................................................................................3
1.3 Expansion Valve Kit .................................................................................4
2. Combination Table ..................................................................................5
Part 2 Specifications......................................................................7
1. Specifications ..........................................................................................8
1.1 Outdoor Units ...........................................................................................8
1.2 Air Handling Units...................................................................................11
Part 3 List of Electrical and Functional Parts .............................13
1. List of Electrical and Functional Parts ...................................................14
1.1 Outdoor Unit ...........................................................................................14
Part 4 Refrigerant Circuit.............................................................15
1. Refrigerant Circuit .................................................................................16
1.1 Outdoor Unit ...........................................................................................16
2. Functional Parts Layout ........................................................................18
2.1 ERQ 100/125/140 A7V1B ......................................................................18
Part 5 Function ............................................................................. 21
1. Operation Mode ....................................................................................22
2. Basic Control.........................................................................................23
2.1 Normal Operation ...................................................................................23
2.2 Compressor PI Control...........................................................................24
2.3 Cooling Operation Fan Control...............................................................25
3. Special Control......................................................................................26
3.1 Startup Control .......................................................................................26
3.2 Oil Return Operation ..............................................................................27
3.3 Defrosting Operation ..............................................................................29
3.4 Pump-down Residual Operation ............................................................30
3.5 Restart Standby......................................................................................31
3.6 Stopping Operation ................................................................................32
4. Protection Control .................................................................................33
4.1 High Pressure Protection Control...........................................................33
4.2 Low Pressure Protection Control............................................................34
4.3 Discharge Pipe Protection Control .........................................................35
4.4 Inverter Protection Control .....................................................................36
5. Other Control.........................................................................................37
5.1 Demand Operation .................................................................................37
5.2 Heating Operation Prohibition ................................................................37
6. Outline of Control ..................................................................................38
6.1 Thermostat Sensor in Remote Controller (only for Z-control) ................38
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