JB-QB-5Ei
Users’ Manual
JB-QB-5Ei
Fire Alarm Control Panel
44
7 Fault analysis and elimination
Table 2 fault and elimination method
Fault phenomenon
Reason analysis
Elimination method
Remark
When the panel is open,
it does not do
self-testing, there is on
any response from the
control panel
whether the main power
supply and back-up power
supply work as normal
check whether main
power supply and
back-up power supply
work as normal
When the panel is open
and do self-testing, the
LEDs flashing is slow
and the sound is not
strong
Programming chip is not
installed tightly
Fix the chip tightly once
again
When the panel is open,
the LCD displays
clobber characters
Library chip or
programming chip is
broken or does not fixed
tightly
Replace or fix the chips
tightly once again
When the panel is open,
control panel LEDs and
sounder self-testing is
ok, but the LCD screen
does not have back-light
and display
LCD screen contrast
gradient is too small to see
its display content
Adjust main board
contrast gradient
potentiometer
When the panel is open,
the left top side of LCD
screen displays
“verification and
wrong!”
1. control panel main
power supply and back-up
power supply voltage is
low
；
2. chip which keeps data is
broken.
Close down the power
supply and open the
panel once again, if it
still cannot solve the
issue, please contact the
product manufacturer.
When the panel is open,
the left top side of LCD
screen displays “ main
power supply and
back-up power supply
voltage is lower!”
Main power supply and
back-up power supply
voltage is low and the
system cannot work as
normal.
Check whether the 220V
main power supply is
normal or not.
Individual detector
makes fault alarm
1. the connection line
between fire detector and
control panel is short
circuited or broken
；
2. fire detector falls off
；
3. fire detector is
damaged
；
1.check whether this
detector base 24V is
working as normal
；
2. If the line is normal
and detector base
voltage is normal, please
replace the detector.
