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7.3.6 Alarm acted state
During the normal state, gas leakage alarm state and normal state again, lamp and buzzer of alarm state
is like below.
AL2 SET POINT
AL1 SET POINT
AL1-LAMP
AL2-LAMP
AL1-RELAY
AL2-RELAY
BUZZER
BUZZER STOP
RESET
7.3.7 Sensor trouble alarm
In case of that sensor is damaged or lead wire is disconnected by connection of combustible gas sensor.
⊙
FAIL LED flicker
⊙
FAIL alarm contact is generated
7.3.8 Fuse disconnection alarm
1) During operation, a inner fuse is disconnected by trouble of instrument or over load of suction pump,
then fail alarm contact is generated and common alarm unit
(AM-2000) makes fail LED, alarm sound and fail alarm contact.
2) Fuse replacement method
⊙
You may off the power S/W at the back of alarm unit.
⊙
After you check out the reason of fuse disconnection, you may change the fuse.
⊙
You supply power again, then the instrument is operated normally after sensor stabilization time.
Notice) You may use the standard fuse. The standard of fuse is 1A, 250V.
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