Daikin Super Multi Plus D-Series - Low Pressure Protection Control

SiEBE18-526 Protection Control
Function 69
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
(Q0376)
Pe: LP pressure sensor detection
value
Low pressure
limited
Low pressure
standby
When occurring 3 times within 60 min.,
the malfunction code "E4"
is output.
Pe< 0.07MPa
(V3176)
&
&
SVP = OFF SVP = ON
• Pe>0.25MPa
• INV upper limit
frequency
More than 124Hz
Pe<0.16MPa
Upper limit:
124Hz
Upper limit:
52Hz
Upper limit: 1-step up from
current compressor frequency
Low pressure not limited
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
Pe: LP pressure sensor detection
value
Low pressure
standby
When occurring 3 times within 60 min.,
the malfunction code "E4"
is output.