Panasonic CS-A181KR Service Manual page 20

CS-A181KR
Operation Details
Deicing Control
Deice starts to prevent frosting at outdoor heat exchanger.
• Normal Deicing
Deice operation detection commences in Heating operation starts or 60 minutes after previous deice operation. If
the outdoor piping temperature drops to –4°C or 50 sec. continuosly during compressor is in operation, deice will
start.
(There is no detection during Outdoor Fan stops.)
• Overload Deicing
During heating operation, if the outdoor Fan OFF duration (due to overload control) is accumulated up to 60 minutes
and after compressor starts for 1 minutes, deicing starts.
• Deicing ends when
(a) 12 minutes after deicing operation starts;
(b) The outdoor piping temperature rises to about 12°C.
• After deicing operation, compressor stops for 30 seconds and 4-way valve stays at cooling position for 10 seconds.
a) Normal Deicing Time Diagram
Indoor
Heat
Exchanger
Temp.
Outdoor
Heat
Exchanger
Temp.
<Description of operation>
a – c : Deicing operation judging condition established.
c – f : Deicing operation.
f – g : Hot start (add 4 minute delay timing)
a b c d e
42°C
34°C
30°C
12°C
-4°C
60'
10" 20"
max
Basic Time
12'
Compressor
4-way Valve
Indoor Fan
Outdoor Fan
Operation LED
f g h i j k l m
60'
10" 20"
max
max max
4' 12'
SLo Lo -
– 19 –
n o p q
60'
4'
SLo Lo -
: Blinking
Operation
Stop
Operation or Stop