Heating Operation - Daikin SkyAir GQI-Eco Series Service Manual

Operation Flow Chart
2.2

Heating Operation

28
Power supply ON
Initialize electronic expansion valve
Initialize micro-computer
Preheating operation control
Remote controller ON
operation judgement
Cooling/Dry
Operation mode
judgement
Cooling/Dry
Thermostat ON judgement
Starting control
four way valve changeover
Hot start control
Normal control
· Compressor step control
· Electronic expansion valve PI control
· Low pressure protection control
· High pressure protection control
· Heating overload control
Defrosting
condition
Four way valve
changeover
Defrost
operation
Defrost
ending
judgement
Four way valve
changeover
Hot start
control
B
Emergency
Emergency
Heating
operation
Heating
· Suction pipe superheat protection control
· Discharge pipe temperature protection control
· Inverter current protection control
· Overall current protection control
· Simulated operation
Thermostat OFF judgement
Room thermostat control
Thermostat OFF by outdoor
temperature
Pump down residual operation
A
B
Remote
Abnormal
Standby
control
judgement
operation OFF
judgement
judgement
Restart standby
A
Function and Control
SiBE281013
stop
Error code
indication