Panasonic AQUAREA WH-ADC0912K6E5AN - 15.2 Protection Control for Heating Operation

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15.2 Protection Control for Heating Operation
15.2.1 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.
15.2.2 Deice Operation
When outdoor pipe temperature and outdoor air temperature is low, deice operation start where outdoor fan motor
stop.
Normally, deice start if pipe sensor temperature fulfill deice condition. If remote controller set to AUTO force defrost
setting, unit will start force deice after heat pump operate for 3 hours without deice at below outdoor temperature 5°C
or outdoor pipe sensor temperature fulfill deice condition and Deice accumulation timer reach 2 hours.
 Deice judging condition
Outdoor Unit Deice Control
Deice starts depends:
1. Outdoor air sensor temp.
2. Outdoor pipe sensor temp.
3. Heating accumulation time.
10
5
0
-5
-10
-15
-20
-25
-30
-30 -20 -10 0
OD Pipe Temperature (°C)
10 20 30
Outdoor Temperature (°C)
When Heating Time > 35 minutes
and Pipe Temperature below this
line for continuous 3 minutes.
Deice operation time diagram
a. Deice mode 1 control:
OD fan
ID pump
Expansion valve
Four way valve
Compressor
Free
Free
ON
OFF
OFF
NONO
Free
5
764
98321
ON
ON
Free
Free
max 9 minutes 30 seconds
deice 1
15.2.3 Force Defrost Operation
Force defrost can be set through remote control with two selection (Manual OR Auto).
 If Manual defrost set, heat pump only run force defrost at heat mode when force defrost request from quick menu
remote control.
 If Auto defrost set, heat pump automatically run force defrost operation when any of below conditions is
achieved :
i) after 3 hours heating accumulation time without defrost when ambient below 5°C.
ii) after outdoor pipe sensor temperature fulfill deice condition and Deice accumulation timer reach 2 hours.
* Deice accumulation timer will not reset when remote control is pressed OFF.