TM 10-6665-297-13&PSECTION4MAINTENANCEANDTROUBLESHOOTINGThe following maintenance program is recommended to assurethat the gas alarm system is operating properly, and to detectand repair any fault that may occur for any reason. Because themanufacturer cannot anticipate or control all conditions to whichan installation will be exposed during its lifetime, the user istherefore cautioned to conduct more frequent inspections andmaintenance operations if experience so dictates.4-1DAILYINSPECTIONDaily (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 zerowhen 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, followzeroing procedures in paragraphs 3-2.1 or refer to Troubleshooting Chart 4-1A. Newlyinstalled elements in the process of stabilizing response to gas condition require morefrequent zero corrections. If FAIL light is on, refer to TROUBLESHOOTING CHART. Anominal 30-second delay circuit prevents alarms from responding until approximately 15 to60 seconds after failure is cleared.4-2WEEKLYINSPECTIONWeekly (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 OPERATEFROM THE TEST PUSHBUTTON UNLESS CIRCUIT CARD EXTENDER #0023-4023 ISINSTALLED BEFORE TESTING. TO PERMANENTLY DISCONNECT REMOTE DEVICES23-96177/1/764-1
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