Toshiba RAS-18UFHP-E Service Manual page 67

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