Daikin REYQ8-48PY1B - 4. Protection Control; 4.1 High Pressure Protection Control

Special Control SiBE37-701_B
121 Function
3.2 Large Capacity Start Up Control (Heating)
For startup, oil return operation, or setup after defrosting, start up multiple compressors at a high speed according to the
conditions of indoor units with thermostat ON, thus maximizing the equipment capacity.
[Starting conditions]
•
The system starts heating operation with thermostat ON at a high load.
•
The system completes defrosting operation.
•
The system switches the operation mode from cooling to heating or
simultaneous cooling and heating operation.
[Control]
1. Start multiple INV compressors in the system at one time.
2. Start multiple STD compressors in the system at intervals of 15 seconds.
INV
STD
Pc
Pe
Start up STD compressors at intervals of 15 seconds.
25
20
15
10
5
0
Time
Pressure
9
8
7
6
5
4
3
Number of
compressors
OR