Discharge Pipe Protection Control - Daikin RXYQ96PYDN Service Manual

SiUS34-801A_b
8.3

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.
[Contents]
[INV compressor]
INV compressor (See *2):
1-step per 30 sec.
*1: HTdi represents a value obtained by correcting the discharge pipe temperature (Tdi) of INV
*2: For INV compressor steps, refer to information on page 45.
[STD compressor]
Normal operation
VRVIII R-410A Heat Pump 60Hz
The following control is performed for each compressor.
&
&
• HTdi>266°F
OR • HTdi>248°F continues
for a period of 90 sec.
Compressor system (See *2):
Restart standby: 10 min.
(up to 2 times for a
period of 100 min.)
compressor with an outdoor temperature.
• HTds>248˚F continues for a period
of consecutive 5 min. or more.
OR
• HTds>275˚F
After a lapse of 10 min.
• HTdi< 230°F
• A lapse of 20 sec.
INV compressor (See *2):
1-step up per 20 sec.
• HTdi>239°F
• A lapse of 30 sec.
Matching of frequency
Step 1
• HTdi>275°F
• HTdi>248°F
OR
continues for a period
STD compressor stops
HTds: Represents a value obtained by correcting
the discharge pipe temperature (Tds) of STD
compressor with an outdoor temperature.
Discharge pipe
temperature standby
occurs 3 times for a
period of 100 min.
Stop due to malfunction
[F3] is displayed.)
running.
Protection Control
67