Outdoor Unit Functional Concept; Function Outline In Cooling Mode - Daikin SkyAir Service Manual

SiBE28-804

3. Outdoor Unit Functional Concept

3.1

Function Outline in Cooling Mode

Flow chart Cooling/Dry operation
*1 Only for Trank Shaped : RZQ100~140C7, RZQS125·140C7V1B
Functional Description
Power supply ON
Initialize motorized valve
Initialize microcomputer
Crank case heater control *1
Preheating operation control
Remote controller
operation judgement
Cooling/Dry
Operation mode
judgement
Heating
Cooling/Dry
Thermostat ON judgement
Starting control
4-way valve changeover
Normal control
Compressor step control
Motorized valve PI control
PMV control
Low pressure protection control
High pressure protection control
Discharge pipe temperature protection control
Oil recovery
operation starting
judgement
Oil recovery
operation
Oil recovery
operation ending
judgement
B
A
Emergency
Emergency
Heating
operation
B
Thermostat OFF judgement
Thermostat OFF by < ∆ > Tr
Thermostat OFF by freeze-up
protection
Restart standby
A

Outdoor Unit Functional Concept

Turn on the power to crankcase heater *1
Inverter current protection control
Inverter fin temperature protection control
Overall current protection control
Low outdoor temperature cooling control
Simulated operation
Remote
Standby
control
judgement
operation OFF
judgement
Malfunction
stop
judgement
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