24
Deice Control
Deice operation is to protect the outdoor unit from freezing.
Normal Deice Operation
Deicing starts 30 minutes after heating mode operation or 60 minutes after the latest deicing operation. If temperature of
outdoor piping, tested by TRS, falls to -3
(TRS OFF) or below for continuously 50 seconds, deicing operation starts.
Overload Deicing Operation
During heating operation, if the accumulative stopping time of outdoor fan reaches 60 minutes,
deicing operation will start 1 minute after compressor starts.
Deicing operation ends under conditions below
(a) After 12 minutes.
(b) Temperature of outdoor unit rises to 4 .
(c) As the illustration showed bellow and due to Time Delay (Td), deicing won t ends immediately.
Once deicing operation starts, it won t end until 60 seconds later.
When deicing operation ends, compressor will stop for 30 seconds, and 4-way valve remains at cooling mode operation
for 10 seconds.
Time Graph for Normal Deicing Operation
a- c
D eicing conf irmation
c- g
D eicing oper at ion( time r es et)
h-j, u- w
Warm Bo oting
o-r
De ic ing( TRS )
42
34
30
a b c d e f g h i j k l m n o p q r s t u v w x y z
Slo Lo
10S
20S 20S
2 0S
20S 20S
10S 20S
Td
or
Basic Time
Compressor
Indoor F an
Ou tdoor F an
Op eration L ED
4 -way valve
max60'
ma x12'
ma x12'
m ax60'
6 0'
Slo Lo
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