![background image](http://html1.mh-extra.com/html/daikin/super-multi-nx-g-series/super-multi-nx-g-series_service-manual_4705809056.webp)
Control Specification
SiUS12-928_A
47
Function and Control
3.3
Controls at Mode Changing / Start-up
3.3.1 Preheating Operation
Outline
The inverter operation in open phase starts with the conditions of the preheating command from the
indoor and outdoor temperatures, and the discharge pipe temperature.
Details
ON Condition
When the outdoor temperature and the discharge pipe temperature are below 10.5°C (51°F),
the inverter operation in open phase starts.
OFF Condition
When the outdoor temperature or the discharge pipe temperature is higher than 12°C (54°F),
the inverter operation in open phase stops.
3.3.2 Four-Way Valve Switching
Outline
In heating operation, current is conducted, and in cooling and defrosting, current is not conducted.
In order to eliminate the switching sound when heating is stopped, as the four-way valve coil
switches from ON to OFF, the OFF delay switch of the four-way valve is carried out after the
operation stopped.
Detail
OFF delay switch of four-way valve:
The four-way valve coil is energized for 150 seconds after the operation is stopped.
3.3.3 Four-Way Valve Operation Compensation
Outline
At the beginning of the operation as the four-way valve is switched, acquire the differential pressure
to activate the four-way valve by having an output frequency which is more than a certain fixed
frequency, for a certain fixed time.
Detail
Starting Conditions
1. When starting compressor for heating.
2. When the operation mode changes from the previous time.
3. When starting compressor for defrosting or resetting.
4. When starting compressor for the first time after the reset with the power is ON.
Set the lower limit frequency to around
Hz for 70 seconds with any of the above conditions
.
(Hz)
Cooling
Heating
18 class
40
55
24/32 class
28
28
Summary of Contents for SUPER MULTI NX G Series
Page 1: ...SiUS12 928_A Applied Models Inverter Multi Heat Pump G Series J Series...
Page 7: ...SiUS12 928_A Table of Contents vi...
Page 10: ...SiUS12 928_A 1 List of Functions Part 1 List of Functions 1 Functions 3...
Page 11: ...SiUS12 928_A List of Functions 2...
Page 17: ...SiUS12 928_A Specifications 8...
Page 23: ...SiUS12 928_A Specifications Specifications 14...
Page 25: ...SiUS12 928_A Printed Circuit Board Connector Wiring Diagram 16...
Page 37: ...SiUS12 928_A Function and Control 28...
Page 69: ...SiUS12 928_A Control Specification Function and Control 60...
Page 71: ...SiUS12 928_A Operation Manual 62...
Page 73: ...SiUS12 928_A Duct Free System Operation Manual 64 2 Duct Free System 2 1 Remote Controller...
Page 84: ...Duct Free System SiUS12 928_A 75 Operation Manual...
Page 85: ...SiUS12 928_A Duct Free System Operation Manual 76 2 8 TIMER Operation...
Page 86: ...Duct Free System SiUS12 928_A 77 Operation Manual...
Page 87: ...SiUS12 928_A Duct Free System Operation Manual 78 2 9 Note for Multi System...
Page 88: ...Duct Free System SiUS12 928_A 79 Operation Manual...
Page 97: ...SiUS12 928_A Slim Duct Built In System Operation Manual 88...
Page 99: ...SiUS12 928_A Service Diagnosis 90...
Page 169: ...SiUS12 928_A Removal Procedure 160...
Page 225: ...SiUS12 928_A Trial Operation and Field Settings 216...
Page 235: ...SiUS12 928_A Appendix 226...