Discharge Pipe Protection Control - Daikin E-Series Service Manual

SiENBE18-621
4.3

Discharge Pipe Protection Control

HTdi>115°C
or
Tp>135°C
INV upper limit frequency:
1-step down from current
compressor frequency
HTdi>115°C
or
Tp>135°C
HTdi>130°C
HTdi>120°C
or
for 90 sec.
or more.
36 Hz Unload
Function
This discharge pipe protection control is used to protect the compressor internal temperature
against a malfunction or transient increase of discharge pipe temperature.
[INV compressor]
Discharge pipe protection
control not limited
&
After 30 sec.
In discharge pipe temp.
protection control
or
Discharge pipe
temperature standby
HTdi : Value of INV compressor discharge pipe
Tp :
HTdi<100°C
Tp<110°C&
HTdi<110°C
&
Tp<125°C
After 20 sec.
HTdi>135°C
HTdi>120°C for 10 min. or more.
When occurring 3 times within 100 minutes,
the malfunction code "F3" is output.
Protection Control
temperature (Tdi) compensated with outdoor
air temperature
Value of compressor port temperature
calculated by Tc and Te, and suction
superheated degree.
INV upper limit frequency: 1-step up
from current compressor frequency
75