3. DEFROST FLOWCHART
Defrosting shall proceed by integrating operation time,
outdoor temperature and outdoor condenser coil temperature as below.
RP1724HJVXA
RP1730HJVXA
(Not defrosted for 10 minutes)
Heating operation start : Compressor ON
Outdoor condenser coil temperature: Over 55.4° F(13°C)
or
Compressor ON time: Maximum 15 minutes
Defrost end
Compressor
integrating
operation:
Over 17 minutes
Compressor
integrating
operation:
Over 57 minutes
Tn ≤ 15.8°F (-9°C)
Tn ≤ 23°F (-5°C)
Compressor
integrating
operation:
Over 35 minutes
2nd or later defrost
Compressor : OFF
Outdoor fan motor : OFF
30 sec later 4-way valve : OFF
35 sec later compressor : ON
Compressor
integrating
operation:
Over 210 minutes
Integrating defrost
Defrost Indicator:
[Operation lamp]
6 sec ON / 2 sec OFF
Defrost start
Tn ≤ 26.6°F (-3°C)
(and after 30 minutes
in 26.6 °F(- 3°C))
Compressor
integrating
operation:
Over 210 minutes
Tn ≤ 23°F (-5°C)
Compressor
OFF count :
40 times
(Less than
10 minutes)
1st defrost
(and after 5 minutes
in 23 °F(- 5°C))
(and after 5 minutes
in 23 °F(- 5°C))
Integrating defrost
(OFF count defrost)
①
②
③
Tn < -13°F (-25°C)
(and after 5 minutes
in 41°F (5°C))
Tn - Tn10 < 9°F (-5°C)
( Tn ≤ 21.2°F (-6°C))
Tn - Tnb < -3.6°F (-2°C)
( Tn ≤ 21.2°F (-6°C))
Ta - Tn ≥ 41°F (5°C)
Tn : Outdoor condenser coil temperature.
Ta : Outdoor temperature.
Tn10 : Temperature of continuous operation at 10 minutes.
Tnb : Back 5 minutes temperature.
and
04-26
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