Daikin SkyAir Super Inverter 70 D Series, Service Manual

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SiE25-110 Function Details
Function and Operation 87
RZP140D
4.2.12 Crankcase heater control
When compressor stops for extended period of time, crank case heater control is conducted in
order to prevent refrigerant from dissolving in compressor oil.
4.2.13 Preheating Operation Control (For RZP71D only)
Conducts preheating operation in the following conditions during compressor stops operation.
∗
Pre-heating operation ON = Compressor Mg S ON
4.2.14 Subcooling heat exchanger control
Conducts ON/OFF control of the solenoid valve for subcooling circuit as follows.
When the compressor operation frequency is at step 10 or lower or either temperature of
discharge pipe or suction pipe is low, the valve does not open.
Collect the oil by opening the SVC for 10 seconds in oil return mode.
4 way valve OFF ON
Operation mode Cooling cycle Heating cycle
Fan M1F M2F M1F M2F
Outdoor unit
fan step
0 step 0 rpm 0 rpm 0 rpm 0 rpm
1 250 0 250 0
2 365 0 285 250
3 285 250 345 310
4 370 335 425 390
5 480 445 520 485
6 620 585 620 585
7 740 705 740 705
8 872 837 797 757
Discharge pipe temperature
(S2546)
ON
OFF
70˚C 75˚C
Starting conditions &
T2 (Discharge pipe temperature)<20˚C
Ta (Outside temperature)<20˚C
or
Power supply ON to First operation
60 minutes or more elapsed after compressor stop
(
Ending conditions or
Ta (Outside temperature)>23˚C
T2 (Discharge pipe temperature)>23˚C
Thermostat ON confirmation
(S2566)