TM 10-6665-297-13&P
SECTION 4
MAINTENANCE AND TROUBLESHOOTING
The following maintenance program is recommended to assure
that the gas alarm system is operating properly, and to detect
and repair any fault that may occur for any reason. Because the
manufacturer cannot anticipate or control all conditions to which
an installation will be exposed during its lifetime, the user is
therefore cautioned to conduct more frequent inspections and
maintenance operations if experience so dictates.
4-1
DAILY INSPECTION
Daily (or as specified in operator's maintenance schedule), perform the following inspections:
Observe to determine if:
a)
Control unit is receiving power from external source.
b)
PILOT light is on.
c)
FAIL light is off.
d)
Indicating meter reads less than zero, or more than zero
when no combustible gas is present at the detector.
NOTE: If meter does not read zero from causes other than presence of gas at the detector, follow
zeroing procedures in paragraphs 3-2.1 or refer to Troubleshooting Chart 4-1A. Newly
installed elements in the process of stabilizing response to gas condition require more
frequent zero corrections. If FAIL light is on, refer to TROUBLESHOOTING CHART. A
nominal 30-second delay circuit prevents alarms from responding until approximately 15 to
60 seconds after failure is cleared.
4-2
WEEKLY INSPECTION
Weekly (or as specified in operator's maintenance schedule), perform the following inspections:
1.
Press and hold TEST pushbutton.
CAUTION: REMOTE ANNUNCIATION AND OTHER ACCESSORY DEVICES OPERATE
FROM THE TEST PUSHBUTTON UNLESS CIRCUIT CARD EXTENDER #0023-4023 IS
INSTALLED BEFORE TESTING. TO PERMANENTLY DISCONNECT REMOTE DEVICES
23-9617
7/1/76
4-1
