Daikin BSVQ36MVJU, Serivce Manual

Page: 62 / 273

SiUS39-601 Protection Control
Function 51
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.
★
Each compressor performs the discharge pipe temperature protection control individually in
the following sequence.
[INV compressor]
[STD compressor]
In discharge pipe temp.
protection control
HTdi>230˚F
Tp>239˚F
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.
or
Discharge pipe temp.
protection control not limited
Discharge pipe
temp.control standby
INV upper limit frequency:
1-step down from current
compressor frequency
INV upper limit frequency: 1-step up
from current compressor frequency
INV62 Hz + OFF
HTdi>230˚F
Tp>239˚F
or
Every 30 sec.
HTdi>275˚F
HTdi>239˚F for 10 min. or more.
or
HTdi<221˚F
Tp<239˚F
&
Every 60 sec.
HTdi>266˚F
HTdi>239˚F
for 90 sec.
or more.
Tp>266˚F
or
HTdi<203˚F
Tp<212˚F
&
When occurring 3 times within 100 minutes,
the malfunction code “F3” is output.
• HTds>239˚F continues for 5 min. or more.
• HTds>275˚F
• Tp>239˚F continues for 10 min. or more.
• Tp>266˚F
or
Applicable STD
compressor stops.
10 min.
Discharge pipe temp.
protection control not limited
HTds : Value of STD compressor discharge
pipe temperature ( Tds) compensated
with outdoor air temperature
Tp : Value of compressor port temperature
calculated by Tc and Te , and suction
superheated degree.