Daikin RZQ100B8V3B Service Manual page 124

Outdoor Unit Functional Concept
3.2.2 Function Outline in Heating Mode
1
Flow chart
2
3
4
5
2–40
Heating operation
Power supply ON
Initialize motorized valve
Initialize microcomputer
Stopping
Crank case heater control
Preheating operation control
Remote controller ON
operation judgement
Cooling/Dry
Operation mode
Cooling/Dry
Thermostat ON judgement
Starting control
4-way valve changeover
Hot start control
Normal control
Compressor step control
Motorized valve PI control
PMV control
Low pressure protection control
High pressure protection control
Heating overload control
Defrosting
condition
4-way valve
changeover
Defrost
operation
Defrost
ending
judgement
4-way valve
changeover
Hot start
control
B
Emergency
judgement
Emergency
Heating
operation
Heating
Discharge pipe temperature protection control
Inverter current protection control
Inverter fin temperature protection control
Overall current protection control
Suction pipe superheat degree protection control
Simulated operation
Thermostat OFF judgement
Thermostat OFF by < ∆ > Tr
Thermostat OFF by outdoor
temperature
Pump down residual operation
Restart standby
A
A
B
Remote
Malfunction
Standby
control
stop
judgement
operation OFF
judgement
judgement
Malfunction
code
indication
Part 2 – Functional Description
ESIE05-03