Daikin D-Series User Manual

Protection Control Si18-525B
120 Function
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 abnormal increase of high pressure and to protect compressors against the transient
increase of high pressure.
In cooling operation
Pc > 3.6MPaEvery 10 sec.
Pc
> 3.55MPa
Pc
< 3.45MPa
Pc>3.75MPa
Keeping the current step
Every 60 sec.
3.45MPa
< Pc≤3.55MPa
Every
5 min.
or
&
High pressure not limited
High pressure limited
INV upper limit frequency:
1-step up from current
compressor frequency
INV upper limit frequency:
1-step up from current
compressor frequency
Pc: HP pressure sensor detection value
INV upper limit frequency :
1-step down from current
compressor frequency
When occurring 3 times within 30
minutes, HPS is activated without high
pressure standby, thus outputting the
malfunction code "E3".
High pressure
standby
(Q0374)
• INV upper limit frequency
• Pc ≤ 3.55MPa
• During oil return operation
• After oil return operation
• Stopping operation
• Heating operation

Daikin D-Series Specifications

General

HSPF Rating	Up to 10.0
Cooling Capacity	9, 000 - 36, 000 BTU/h
Heating Capacity	9, 000 - 36, 000 BTU/h
Energy Efficiency Ratio (EER)	Up to 12.5
Sound Level	19 - 50 dB (Indoor), 49 - 60 dB (Outdoor)
Noise Level	19 - 50 dB (Indoor), 49 - 60 dB (Outdoor)
Power Supply	208/230V, 1-phase, 60Hz