Discharge Pipe Temperature Protection Control - Daikin RMXS-L Series Service Manual

SiUS181631EA
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
HTdi > 115˚C
(239˚F)
or
Tp > 135˚C
(275˚F)
Upper limit frequency:
1-step down from current
compressor frequency
HTdi > 115˚C
(239˚F)
or
Tp > 135˚C
(275˚F)
HTdi > 130˚C
(266˚F)
HTdi > 120˚C
or
(248˚F)
for 90 sec. or
more.
36 Hz Unload
HTdi : Value of discharge pipe temperature (Tdi)
Tp :
Functions and Control
Discharge pipe temperature
protection control not limited
&
After 30 sec.
Discharge pipe temperature
protection control
or
Discharge pipe
temperature standby
compensated with outdoor temperature
Value of compressor port temperature
calculated by Tc and Te, and suction
superheated degree.
HTdi < 100˚C (212˚F)
Tp < 110˚C (230˚F)
HTdi < 100˚C (212˚F)
&
Tp < 125˚C (257˚F)
After 20 sec.
HTdi > 135˚C (275˚F)
HTdi > 120˚C (248˚F) for 10 min. or more.
When occurring 3 times within 100 minutes,
the error code F3 is output.
Protection Control
Upper limit frequency: 1-step up
from current compressor frequency
(R19083)
63