SiUS181305E
Protection Control
Function
52
4.3
Discharge Pipe Temperature Protection Control
Outline
Discharge pipe temperature protection control protects the compressor internal temperature
against a malfunction or temporary increase of discharge pipe temperature.
<Compressor>
or
36 Hz Unload
or
After 30 sec.
After 20 sec.
or
Discharge pipe
temperature standby
(R19083)
Discharge pipe temperature
protection control not limited
Upper limit frequency:
1-step down from current
compressor frequency
Discharge pipe temperature
protection control
Upper limit frequency: 1-step up
from current compressor frequency
When occurring 3 times within 100 minutes,
the error code
F3
is output.
HTdi : Value of discharge pipe temperature (Tdi)
compensated with outdoor temperature
Tp : Value of compressor port temperature
calculated by Tc and Te, and suction
superheated degree.
HTdi > 115˚C
(239˚F)
Tp > 135˚C
(275˚F)
or
HTdi > 115˚C
(239˚F)
Tp > 135˚C
(275˚F)
HTdi < 100˚C (212˚F)
Tp < 110˚C (230˚F)
&
HTdi < 100˚C (212˚F)
Tp < 125˚C (257˚F)
HTdi > 130˚C
(266˚F)
HTdi > 120˚C
(248˚F)
for 90 sec. or
more.
HTdi > 135˚C (275˚F)
HTdi > 120˚C (248˚F) for 10 min. or more.
&
