Specifications

SiBE341027 Detailed Control Functions
Function 53
[In heating]
In case of multi-outdoor-unit system, each outdoor unit performs this control individually in the following sequence.
Normal operation
Pe < 0.17 MPa
(Without preconditions)
(Without preconditions)
Current step maintained
STD compressor 2: OFF
STD compressor 1: OFF
Solenoid valve (hot gas)
(Y1S): ON
Restart standby
(3 times per 60 minutes at max.)
Stop due to error
(“
E4” displayed)
Low pressure standby
4 times per 60 minutes at max.
Pe < 0.12 MPa Pe > 0.17 MPa
Pe < 0.07 MPa
INV. compressor: 52 Hz
INV. compressor
3 step down
INV. compressor
1 step up
&
•Pe > 0.23 MPa
•Compressor step = Max. step
&
•Pe > 0.20 MPa
•After 15 seconds
&
•Pe< 0.17 MPa
•After 10 seconds
•Pe < 0.13 MPa
•After 10 seconds
•Pe < 0.13 MPa
•After 10 seconds
&
•Pe < 0.13 MPa
•After 10 seconds
&
&