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Basic Control
ESiEN09-06 A
24
Function
2. Basic Control
2.1
Normal Operation
2.1.1 List of Functions in Normal Operation
Part Name
Symbol
(Electric
Symbol)
Function of Functional Part
Normal Cooling
Normal Heating
Compressor
(M1C, M2C)
PI control, High pressure
protection, Low pressure
protection, Td protection,
INV protection,
PI control, High pressure
protection, Low pressure
protection, Td protection,
INV protection,
Outdoor unit fan
(M1F)
Cooling fan control
Step 7 or 8
Four way valve
20S1
(Y1R)
OFF
ON
Main motorized valve
EV1
(Y1E)
480 pls
PI control
Subcool heat exchanger
electronic expansion valve
EV2
(Y2E)
PI control
PI control
Hot gas bypass valve
SVP
(Y1S)
OFF
Energized when the system is set
to low pressure control mode
Accumulator oil return valve SV0
(Y2S)
ON
ON
AHU actuator
Normal cooling
Normal heating
Fan
Thermostat ON unit
ON
ON
Stopping unit
OFF
OFF
Summary of Contents for ERQ Series
Page 2: ......
Page 16: ...Combination Table ESiEN09 06 A 6 General Information...
Page 17: ...ESiEN09 06 A Specifications 7 1 Specifications 8 1 1 Outdoor Units 8...
Page 33: ...ESiEN09 06 A Function general Function 23 1 2 Operation Mode...
Page 58: ...Outline of Control ESiEN09 06 A 48 Function...
Page 71: ...ESiEN09 06 A Wiring Diagram of Control Box Control Box EKEQ CBV3 61 3 2 F box...
Page 109: ...Test Operation ESiEN09 06 A 100 Test Operation 1 2 2 Turn power on...