Protection Control For Heating Operation - Panasonic CS-E9GFEW Service Manual

11.2.6 Odor Cut Control
To reduce the odor released from the unit.
Start Condition
o
AUTO FAN Speed is selected during COOL or DRY operation.
During freeze prevention control and timer preliminary operation, this control is not applicable.
Control content
o
Depends on compressor conditions:
1. Compressor OFF → Compressor ON.
The indoor unit fan stops temporarily and then starts to blow at minimum airflow for 30 seconds.
2. Compressor ON → Compressor OFF.
The indoor unit fan stops for 90 seconds and then blows at minimum airflow for 20 seconds.

11.3 Protection Control For Heating Operation

11.3.1 Intake Air Temperature Control
Compressor will operate at limited freq., if indoor intake air temperature is 30°C or above.
11.3.2 Outdoor Air Temperature Control
The Max current value is regulated when the outdoor air temperature rise above 14°C (E9/12PFE) and 14°C
(E18PFE) in order to avoid compressor overloading.
11.3.3 Overload Protection Control
The compressor operating frequency is regulated in accordance to indoor heat exchanger temperature as shown
below.
If the heat exchanger temperature exceeds 60°C, compressor will stop.
11.3.4 Low Temperature Compressor Oil Return Control
In heating operation, if the outdoor temperature falls below -10°C when compressor starts, the compressor
frequency will be regulated up to 600 seconds.
11.3.5 Cold Draught Prevention Control
When indoor pipe temperature is low, cold draught operation starts where indoor fan speed will be reduced.
11.3.6 Deice Operation
When outdoor pipe temperature and outdoor air temperature is low, deice operation start where indoor fan motor
and outdoor fan motor stop and operation LED blinks.
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