FILE NO. SVM-02008
– 66 –
9-8-3. How to check outdoor P.C. board
When the check code is detected on the outdoor unit, the following lamps are indicated on the LED display and
the Dip switch (DSW01).
Table 9-8-3 LED display and check code
• When the lamps (1 to 4) on the LED are indicated in order, the phase detecting protection circuit operates
regardless of the Dip switch setting.
Fig. 9-8-1 Dip switch and LED
Table 9-8-4
Dip switch
LED
Check contents
1234
Normal operation
Timer short operation
20 Power line protective circuit
1E Heat exchanger sensor (TD) temperature rise protection
21 IOL operation
All off
18 Thermo sensor (TE) circuit
19 Heat exchanger sensor (TD) circuit
Normal operation
Protective operation : Once
Protective operation : Twice
Protective operation : Three times
As Protective operation : Four times (Emergency stop)
follows
18 Thermo sensor (TE) circuit
All off
19 Heat exchanger sensor (TD) circuit
1E Heat exchanger sensor (TD) temperature rise protection
21 IOL operation
Dip
LED
switch
1 Red 2 Yellow 3 Yellow 4 Yellow
Table 1
Table 2
Timer short
18 Thermo sensor
(TE) circuit
19 Heat exchanger
sensor (TD) circuit
1E Heat exchanger
sensor (TD) temp.
rise protection
21 IOL operation
circuit
Protective operation frequency for sensor
circuit error
20 Power line
protective circuit
LED
Indication exchange
Dip switch (SW01)
Schematic Diagram of
Outdoor Control Board
D04 Orange
Serial receiving LED
D05 Green
Serial transmitting LED
1
D23
18
12
ON
SW01
2
D24
D25
D20
D22
CN28
CN16
CN29
CN17
CN19
CN18
RB03
10 X
R91
D26
R90
R93 R92
D41
D40
D42
D43
D44
D45
D46
D47
Q60
8
R64
C
R65
C64
22
1
2
3
D10
D08
D09
D07
R23
R22
007
008
8
8
+5V
ON
1
2
ON
1
2
LED status
: The lamp is indicated. : The lamp blinks fast. : The lamp blinks slow. : The lamp is not indicated.
ON
1
2
ON
1
2
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