Discharge Pipe Temperature Protection Control - Daikin SkyAir RZR-TA Series Service Manual

SiUS281811E
4.3

Discharge Pipe Temperature Protection Control

This discharge pipe temperature protection control is used to protect the compressor internal
temperature against an error or transient increase of discharge pipe temperature.
HTdi: Value of inverter compressor discharge pipe temperature (Tdi) compensated with outdoor air
temperature
Tp: Value of compressor port temperature calculated by Tc, Te, and suction superheated degree.
HTdi > 115˚C (239˚F)
•
OR
Tp > 135˚C (275˚F)
•
Compressor 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 (248˚F)
•
OR
for 90 seconds
or more.
36 Hz Unload
Part 4 Functions and Control
Discharge pipe protection
control not limited
&
After 30 seconds
In discharge pipe temp.
protection control
OR
Discharge pipe
temperature standby
• HTdi < 100˚C (212˚F)
• Tp < 110˚C (230˚F)
HTdi < 110˚C (230˚F)
•
&
Tp < 125˚C (257˚F)
•
After 20 seconds
HTdi > 135˚C (275˚F)
•
HTdi > 120˚C (248˚F) for 10 minutes or more.
•
When occurring 3 times within 100 minutes,
the error code
Protection Control
Compressor upper limit frequency: 1-step
up from current compressor frequency
F3 is output.
89