Specifications
Table Of Contents
- Cover
- Table of Contents
- Part 1 General Information
- Part 2 Specifications
- Part 3 Refrigerant Circuit
- Part 4 Function
- Part 5 Test Operation
- Part 6 Troubleshooting
- Part 7 Appendix
- 1. Piping Diagrams
- 2. Wiring Diagrams for Reference
- 3. List of Electrical and Functional Parts
- 4. Option List
- 5. Piping Installation Point
- 6. Example of connection (R-410A Type)
- 7. Thermistor Resistance / Temperature Characteristics
- 8. Pressure Sensor
- 9. Method of Checking the Inverter’s Power Transistors and Diode Modules
- Part 8 Precautions for New Refrigerant (R-410A)
- Index
- Drawings & Flow Charts
Si34-704 Function general
Function 85
1.2 Operation Mode
Indoor unit thermostat ON
Operation mode
changeover
Pump-down
residual
operation
Malfunction/
Standby (Retry)
Malfunction/
Standby (Retry)
After completion of
startup control
Normal operation
• Compressor PI control
• Electronic expansion
valve PI control
• Protection control
in operation
Oil return IN
conditions are met.
Ye s
No
Indoor unit stop or
thermostat OFF
Indoor unit stop or
thermostat off (After
completion of oil return
or defrost control)
Oil return operation
Outdoor unit
rotation
Operation
mode
changeover
Operation in
stop mode
Indoor unit stop or
thermostat OFF
Malfunction/Standby (Retry)
Restart standby
(Compressor stop)
Pressure
equalization
prior to startup
Malfunction/
Standby
(Retry)
Startup control
• Cooling startup control
(After completion of
startup control)
Indoor unit thermostat ON
Indoor unit stop or
thermostat OFF
∗
)
In the event indoor unit stops or
the thermostat turns OFF while in
oil return operation or defrosting
operation, pump-down residual
operation is performed on
completion of the oil return
operation or defrosting operation.
Cooling
∗