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To C
Reset
counters
A, B, and C
Is integrated
NO
operating time of
compressor longer
than 1.5 Hr ?
NO
T
-T
Table 1
C
R
YES
NO
(T
)n+1 -T
Table 2
C
R
YES
NO
Is O.L.P.
operating ?
NO
Is D condition
applied ?
Is counter B larger
NO
than counter A? or
Is counter B equal
to counter A?
YES
Set DEFROST time to
7R:
6/5 minutes.
9R:
7 minutes.
12R:
6 minutes.
14R:
6 minutes.
NO
Is [(Tc)n-(Tc)n+1]
above +2.1 deg. ?
Does counter C
NO
indicate 3 times
or more ?
YES
YES
NO
NO
NO
Is compressor
turned off ?
YES
YES
NO
Is integrated
NO
operating time of
compressor longer
than 30 minutes ?
YES
YES
Set DEFROST time to
7R:
9/8 minutes.
9R:
9 minutes.
12R:
8 minutes.
14R:
7 minutes.
• Indoor fan motor turned off.
• Outdoor fan motor turned off.
Is [(Tc)n-(Tc)n+1] in
NO
the range of +0.6 to
+2.1 deg. ?
YES
Counter B +1
NO
(T
)n+1 -T
C
Does counter C
NO
indicate 3 times
or more ?
T
-T
Table 1
C
R
Is integrated
YES
operating time of
compressor longer
Is integrated
than 30 minutes ?
operating time of
compressor longer
than 40 minutes ?
YES
Is integrated
operating time of
compressor longer
than 3 Hr ?
Set DEFROST time to
7R:
13 minutes.
9R:
12 minutes.
12R:
10 minutes.
14R:
10 minutes.
• Compressor turned off.
• DEFROST indication starts.
E
To E
– 10 –
From A
From B
A
B
YES
Counter A +1
Counter C +1
Table 2
R
YES
NO
YES
D condition
Table 2 : Temperature difference between
Indoor heat exchanger
temperature and Room
temperature (T
)n+1- T
C
MODEL (50/60Hz)
INDOOR
FAN
MODE
7R
9R
+
H, H
13/13
-
14/14
–––
M, M
15/15
L, SQ
High
14/14
–––
Low
17/17
DEFROST indication:
7R
: Defrost LED is lighted.
9R/12R/14R: Operation lamp flashes 3
sec. ON and 1 sec. OFF.
To D
(°C)
R
12R
14R
–––
–––
19/19
18/18
22/22
21/21
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