Toshiba RAS-18YKH-E Service Manual page 35

9-3-6. Judgment by LED Display on Outdoor P.C. Board
When the check code is checked at the outdoor unit side, the following indications are available by LED and Dip
switch (DSW01).
Dip switch
Timer short
ON
Table 1
1 2
18 Heat exchanger
ON
Table 2
19 Heat exchanger
1 2
• When LED 1 to 4 is indicated with light in order, the phase detect protection circuit operates regardless of
setting of Dip switch.
D23 D40
D18
D20
D22
R91
RB03
R93 R92
LED
< Table 1 >
LED
Dip
switch
1 2 3 4
Normal operation
Timer short operation
20 Power line protective circuit
ON
1E Pipe sensor (TD) temp.
21 High-pressure switch
1 2
Check 18 and 19. <See Table 2>
: Goes on
Table 9-3-3 LED display and check code
1 Red
20 Power line
sensor (TE) circuit,
sensor (TL) and pipe
sensor (TD) circuit
1
2
D44
D41
D24 D45
D42
D25 D46
D43 Q60
D26 D47
8
CN16
+5V
CN28 CN29 R64 C
CN17
CN18
C64
CN19
R65
D07
22
1
2
D08
R22
D09
3
R23
D10
4
Fig. 9-3-7. Dip switch and LED position
Check contents
up protection
line circuit
: Fast flashing
LED
2 Yellow 3 Yellow
protective circuit
Indication exchange
Dip switch (SW01)
D04 Orange
Serial receive LED
D05 Green
Serial send LED
< Table 2 >
LED
Dip
switch
1 2 3
ON
All
As
off
follows.
1 2
LED status
: Slow flashing
– 35 –
4 Yellow
1E Pipe sensor (TD)
temp. up protection
21 High-pressure switch
line circuit
Protective operation frequency of
sensor circuit error
Schematic Diagram of
Outdoor Control Board
Check contents
4
Normal operation
Protective operation : Once
Protective operation : Twice
Protective operation : Three times
Protective operation :
Four times (Emergency stop)
18 Heat exchanger (TE) circuit
19 Pipe sensor (TD) circuit
Check 1E and 21. <See Table 1>
: Goes off
All
off