Daikin SkyAir FHQ24PVJU - Protection Control; High Pressure Protection Control

SiUS281811EA Protection Control
Part 4 Functions and Control 117
4. Protection Control
4.1 High Pressure Protection Control
This high pressure protection control is used to prevent the activation of protection devices due to
an abnormal increase of high pressure and to protect compressors against the transient increase of
high pressure.
Pc: High pressure sensor detection value
Cooling
operation
Pc > 3.47 MPa (503 psi)After 10 sec.
Pc
> 3.47 MPa (503 psi)
Pc
< 3.23 MPa (468 psi)
Pc > 3.64 MPa (528 psi)
Current step maintained
After 15 sec.
High pressure not limited
High pressure limited
Compressor upper limit
frequency: 3-step down from
current compressor frequency
When occurring 10 times within 60
minutes, high pressure switch is activated
without high pressure standby, thus
outputting the error code E3.
Compressor upper limit frequency: Maximum
High pressure
standby
Compressor upper limit
frequency: 1-step up from
current compressor frequency