Daikin ERQ Series Service Manual page 41

ESiEN09-06 A
3.2.2 Oil Return Operation in Heating Operation
Outdoor Unit Actuator
Compressor
Outdoor unit fan
Four way valve
Main motorized valve (EV1)
Subcooling motorized valve (EV2)
Hot gas bypass valve (SVP)
Accumulator oil return valve (SVO)
Injection (SVT) (RXYQ5P model only)
Ending conditions
Fan
Function
Oil return preparation
operation
Upper limit control
STEP7
or
STEP8
ON
SH control 480 pls
SH control
OFF
ON
OFF
170 sec.
AHU actuator
Thermostat ON unit
Stopping unit
Oil return operation
176 Hz + ON + ON
OFF
OFF
480 pls
0 pls
OFF
ON
OFF
4 min.
or
Ts - Te<5 C
Heating oil return operation
Special Control
Post-oil-return operation
124 Hz + OFF + OFF
2-steps increase/20sec.
till Pc - Pe>0.4 MPa
STEP8
ON
55 pls
0 pls
OFF
ON
OFF
10 sec.
or
Pc - Pe>0.4MPa
Field setting
OFF
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