Q155 Service Manual
3-6
3.4.1.
Power Failure Alarm Test
To test the power failure alarm:
Unplug the unit from wall outlet, and set the ON/OFF switch to the ON position.
This should immediately activate the audible alarm. (One short beep, long pause)
3.4.2.
Low Pressure Alarm Test
To test the low-pressure alarm system:
i.
Set the ON/OFF switch to the OFF position, and unplug the power cord.
ii.
Remove the cabinet, then disconnect the compressor power connector
from the circuit board. (See Figure 3-7)
iii.
Plug in the unit, and set the ON/OFF switch to the ON position.
iv.
When the pressure is 0.7
±
0.2kgf/cm
2
below, the audible alarm should be
four short beep, long pause and repeat this cycle.
v.
Set the ON/OFF switch to the OFF position, and unplug the power cord.
vi.
Reconnect the compressor power connector to the circuit board.
vii.
Reinstall the cabinet.
Figure 3-7 Compressor power connector
3.4.3.
High Pressure Alarm Test
To test the High-pressure alarm system:
i.
Set the ON/OFF switch to the OFF position, and unplug the power cord.
ii.
Remove the cabinet and disconnect the intake solenoid coil terminals of
solenoid valve. (See Figure 3-8)
iii.
Plug in the unit, and set the ON/OFF switch to the ON position.
iv.
When the pressure is above 2.2
±
0.2kgf/cm
2
, the audible alarm should be
three short beep, long pause and repeat this cycle.
v.
Set the ON/OFF switch to the OFF position, and unplug the power cord.
vi.
Reconnect the intake solenoid coil terminal.
vii.
Reinstall the cabinet.
Compressor
power connector