Daikin VRV II-Q RQYQ8-48PY1B Service Manual page 63

SiBE341027
[In heating]
In case of multi-outdoor-unit system, each outdoor unit performs this control individually in the following sequence.
Pe < 0.17 MPa
INV. compressor
3 step down
•Pe < 0.13 MPa
&
•After 10 seconds
STD compressor 2: OFF
•Pe < 0.13 MPa
&
•After 10 seconds
STD compressor 1: OFF
Pe < 0.12 MPa
Solenoid valve (hot gas)
(3 times per 60 minutes at max.)
Function
Normal operation
(Without preconditions)
•Pe< 0.17 MPa
&
•After 10 seconds
Pe > 0.17 MPa
(Y1S): ON
Pe < 0.07 MPa
Restart standby
•Pe > 0.20 MPa
&
•After 15 seconds
Current step maintained
(Without preconditions)
•Pe < 0.13 MPa
&
•After 10 seconds
Stop due to error
E4
(" " displayed)
Detailed Control Functions
•Pe > 0.23 MPa
&
•Compressor step = Max. step
INV. compressor
1 step up
INV. compressor: 52 Hz
Low pressure standby
4 times per 60 minutes at max.
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