76
13.2 Protection Control for Heating Operation
13.2.1 Outdoor Air Temperature Control
The maximum current value is regulated when the outdoor air temperature rises above 14°C in order to avoid
compressor overloading.
13.2.2 Deice Operation
When outdoor pipe temperature and outdoor air temperature is low, deice operation start where outdoor fan motor
stop.
Deice judging condition
-30
-30
-20
-10
0
10
20
30
-25
-20
-15
-10
-5
0
5
10
O
D
P
ipe
T
e
m
p
er
a
tur
e
(
°C
)
Outdoor Unit Deice Control
line for continuous 3 minutes
and Pipe Temperature below this
When Heating Time > 35 minutes
Outdoor Temperature (°C)
3. Heating accumulation time
1. Outdoor air sensor temp.
2. Outdoor pipe sensor temp.
Deice start depends:
Deice operation time diagram
a. Deice mode 1 control:
OD fan
ID pump
Expansion valve
Four way valve
Compressor
Free
Free
ON
OFF
OFF
ON
ON
Free
5
7
6
4
9
8
3
2
1
ON
ON
Free
Free
max 9 minutes 30 seconds
deice 1
Summary of Contents for WH-SHF09F3E5
Page 19: ...19 4 2 Outdoor Unit Air inlet rear Air outlet Air inlet side ...
Page 32: ...32 10 1 2 Solar Printed Circuit Board Optional ...
Page 48: ...48 67 C 67 C 60 C 65 C 63 C 67 C 67 C ...
Page 49: ...49 60 C 60 C 65 C 65 C 72 C ...
Page 55: ...55 67 C 67 C 67 C 67 C ...
Page 56: ...56 67 C 67 C 60 C 60 C 55 C 75 C ...
