Protection Control SiE39-404
96 Function
4.3 Discharge Pipe Protection Control
This discharge pipe protection control is used to protect the compressor internal temperature
against a malfunction or transient increase of discharge pipe temperature.
H Each compressor performs the discharge pipe temperature protection control individually
in the following sequence.
[INV compressor]
[STD compressor]
HTdi>110°C
Tp>115°C
or
INV62 Hz + OFF + OFF
HTdi>110°C
Tp>115°C
or
Every 30 sec.
HTdi>135°C
HTdi>115°C for 10 min. or more.
or
HTdi<105°C
Tp<115°C
&
Every 60 sec.
HTdi>130°C
HTdi>115°C
for 90 sec.
or more.
Tp>130°C
or
HTdi<95°C
Tp<100°C
&
Discharge pipe temp.
protection control not limited
INV upper limit frequency:
1-step down from current
compressor frequency
In discharge pipe temp.
protection control
Discharge pipe
temp.control standby
When occurring 3 times within 100 minutes,
the malfunction code “F3” is outpu
t.
INV upper limit frequency: 1-step up
from current compressor frequency
HTdi : Value of INV compressor discharge pipe
temperature (Tdi) compensated with
outdoor air temperature
Tp : Value of compressor port temperature
calculated by Tc and Te, and suction
superheated degree.
• HTds>115°C continues for 5 min. or more.
• HTds>135°C
• Tp>115°C continues for 10 min. or more.
• Tp>130°C
or
10 min.
Discharge pipe temp.
protection control not limited
Applicable STD
compressor stops.
HTdi : Value of INV compressor discharge pipe
temperature (Tdi) compensated with
outdoor air temperature
Tp : Value of compressor port temperature
calculated by Tc and Te, and suction
superheated degree.
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