Daikin RZQ Series FCQ20EVA Service Manual page 53

SiME281501E
4.2.21 Pump Down Residual Operation
Conducts pump down residual operation when compressor stops to collect refrigerant in evaporator for
preventing liquid refrigerant from remaining in the evaporator.
Contents of Control
Compressor
Electronic expansion valve
Solenoid valve for receiver gas purging (SVG)
Ending Condition
30 seconds elapsed with residual operation
OR
Lp < 0.2 MPa (Cooling)
Lp < 0.1 MPa (Heating)
4.2.22 Oil Recovery Operation
When compressor operates for extended period of time with low frequency, oil level in compressor may be
lowered due to incomplete oil recovery. To prevent the problem, conducts oil recovery operation with higher
compressor operation frequency for 5 minutes.
 The interval of oil recovery operation may be shortened when the compressor operates frequently with low
frequency.
Function and Control
RZQ
110 Hz
0 pls
(fixed opening degree)
ON (open)
Function Details
44