RespirAide R200T, Руководство по обслуживанию

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PART V TROUBLESHOOTING
5-7
ENGLISH
CHECK indicator light flashing
When you open the bottom plate you can see the twin red color wires (Power supply signal wire), which are
connecting the power supply and the main circuit board (Fig. 5.2-3, No.4-signal wire). The microprocessor on the main
circuit board is detecting the voltage on the signal wire when the unit is turned on.
As long as the voltage on the signal wire is less than 1.3V dc, the microprocessor understands the cell-power supply
system is failed and light up the CHECK indicator light with warning beep sound. The following reasons can reduce the
voltage on the signal wires to less than 1.3V DC, causing the CHECK indicator light flashing.
1. A short circuit in the cell
If there is a short circuit in the cell the power supply will automatically reduce the voltage less than 1.3V dc.
2. Power supply failure
If the power supply cannot provide high and low voltages to the cell, the voltage will be less than 1.3V dc on the signal
wire. If the signal wire itself is damaged, the voltage will also be blow 1.3V dc.
3. Discharge switch short circuit
If the discharge switch is short circuited itself between the low voltage wire and the ground wire, the voltage will be
decreased under 1.3V dc.
Fig. 5.2-3 The CHECK indicator light flashes when
the voltage on the power supply signal wire is less
than 1.3V dc.
1-Power supply power cord
2-High voltage wire of power supply
3-Low voltage wire of power supply
4-Power supply signal wire
5-Ground wire of power supply
6-Voltage wire of discharge switch
7-Ground wire of discharge switch
8-Ground wire of unit ground terminal
1
1
2
3 6
7
8
8
7
4
4
5
R
Discharge
switch
Main circuit
board
High voltage
power supply
CHECK indicator light flashing
1
1
2
3
6
8
7
4
4
5
1
2
3
4
5
6
7
8
Main circuit board-B
Main circuit board-A
Notice: When you plug the power
cord into the wall outlet, all the
indicator lights on the display panel
will light up for 2 seconds with the
red CHECK indicator light.