Daikin FTKS50BVMB, Service Manual

Page: 120 / 456

SiEN18-622 Protection Control
Function 107
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]
[In heating operation]
Pc> 3 .47MP a After 10 s ec.
Pc> 3 .47MP a
Pc< 3 .2 3 MP a
Pc> 3 .64MP a
Keeping the c u rrent s tep
After 15 s ec.
High pre ssu re not limited
High pre ssu re limited
INV u pper limit fre qu ency :
1- s tep u p from c u rrent
compre ss or fre qu ency
Pc: HP pre ssu re s en s or detection v a l u e
INV u pper limit fre qu ency :
3 - s tep down from c u rrent
compre ss or fre qu ency
When occ u rring 10 time s within 60
min u te s , HP S i s a ctiv a ted witho u t high
pre ssu re s t a nd b y, th us o u tp u tting the
m a lf u nction code "E 3 ".
INV u pper limit fre qu ency=M a x
High pre ssu re
s t a nd b y
High-pre ssu re drop
Pc> 3 .04MP a After 10 s ec.
Pc> 3 .04MP a
Pc<2.94MP a
Pc> 3 .64MP a
Keeping the c u rrent s tep
After 60 s ec.
High pre ssu re not limited
High pre ssu re limited
INV u pper limit fre qu ency :
1- s tep u p from c u rrent
compre ss or fre qu ency
Pc: HP pre ssu re s en s or detection v a l u e
INV u pper limit fre qu ency :
1- s tep down from c u rrent
compre ss or fre qu ency
When occ u rring 10 time s within 60
min u te s , HP S i s a ctiv a ted witho u t high
pre ssu re s t a nd b y, th us o u tp u tting the
m a lf u nction code "E 3 ".
High pre ssu re
s t a nd b y
Pc<2. 8 9MP a