Defrosting Operation - Haier HR18D2VAR Service Manual

5. Defrosting operation

5.1 Defrosting procedure:SW1-1: OFF; SW1-2: OFF
heat pump mode
yes
record Tp0 after compressor on for 8 min
yes
Is Tp(pipe temp)< 35.6 for 10 sec
yes
30 min > the compressor
runtime>15min
yes
Tp-Tp0< 10 for 3 min
yes
go to defrost
the compressor runtime>180min
5.2 Defrosting procedure:SW1-1: ON; SW1-2: OFF
heat pump mode
yes
record Tp0 after compressor on for 8 min
yes
Is Tp(pipe temp)<35.6 for 10 sec
yes
30 min > the compressor
runtime>15min
yes
Tp-Tp0<10.4 for 3 min
yes
go to defrost
Note: The defrost action will be end when defrost has worked for 10 minutes or when the piping
temp. arrives at or more than 50
38
Central Air Conditioning
(The unit of temp. is
no
Check and reconnect
60 min > the compressor
no
runtime>30min
yes
Tp-Tp0<17.6 for 3 min
yes
go to defrost
yes
go to defrost
no
Check and reconnect
45 min > the compressor
no
runtime>30min
yes
Tp-Tp0<17.6 for 3 min
yes
go to defrost
.
℉
)
℉
90 min > the compressor
no
runtime>60min
Tp-Tp0<23 for 3 min
go to defrost
no
180 min > the compressor
runtime>120min
yes
Tp-Tp0<26.6 for 3 min
or Tp<10.4 for 3 min
yes
go to defrost
no the compressor
runtime>45min
go to defrost
Model: Heat Pump, HR13-D1
no
yes
yes
no
120 min>the compressor
runtime>90 min
yes
Tp-Tp0<23 for 3 min
or Tp<10.4 for 3 min
yes
go to defrost
yes