Daikin D-Series User Manual

Protection Control Si18-525B
122 Function
4.2 Low Pressure Protection Control
This low pressure protection control is used to protect compressors against the transient
decrease of low pressure.
In cooling operation
In heating operation
Pe < 0.25MPa
52Hz
SVP=OFF
SVP=ON
Pe > 0.4MPa
Pe
< 0.15MPa Pe > 0.30MPa
Pe
< 0.07MPa
Low pressure not limited
Low pressure
standby
Low pressure
limited
Pe: LP pressure sensor detection
value
When occurring 3 times within 60 min.,
the malfunction code "E4"
is output.
(Q0376)
Pe< 0.07MPa
Upper limit:
124Hz
Upper limit:
52Hz
Upper limit: 1-step up from
current compressor frequency
(V3176)
&
• Pe>0.25MPa
• INV upper limit
frequency
&
More than 124Hz
Pe<0.16MPa
SVP = OFF SVP = ON
Low pressure not limited
Low pressure
standby
Low pressure limited
Pe>0.19MPa(every 20 sec.)
Pe>0.17MPa
Pe<0.13MPa
Pe<0.13MPa
Pe<0.16MPa
Pe<0.10MPa
Pe>0.19MPa
When occurring 3 times within 60 min.,
the malfunction code "E4"
is output.
Pe: LP pressure sensor detection
value

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