General Control Scheme Flowchart - Sinclair SDV5 Series Service Manual

1 General Control Scheme Flowchart

Sections 3-2 to 3-7 on the following pages detail when each of the controls in the flowchart below is activated.
Stop operation
 Abnormal shutdown
 System stop
Standby control
 Crankcase heater control
Startup control
 Compressor startup delay control
 Startup control for cooling operation
 Startup control for heating operation
Normal operation control
 Component control during normal operation
 Compressor output control
 Compressor step control
 Electronic expansion valve control
Protection control
 High pressure protection control
 Low pressure protection control
 Discharge temperature protection control
 Compressor protection control
 Disable heating control
18
Thermo on
2
3
4
Special control
5
Conditions met
for oil return
Conditions met
for defrosting
6
Legend
 Oil return operation
 Defrosting operation
Numbers in the top right-hand
corners of boxes indicate the
relevant section of text on the
following pages.
7