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4. Fault Isolation
_______________
(Ref. Fig. 201/TASK 26-17-00-991-001) R
R A. If the test gives a different maintenance message:
R - Do the trouble shooting procedure related to the maintenance message.
R
B. If the test gives the maintenance message TEST OK, no other maintenance action is necessary.
C. If the test gives the maintenance status message SMOKE LAV + CRG DET FAULT and the trouble shooting data gives the complementary information SMOKE DET LOOP: make sure that all electrical connectors are connected to the smoke detectors in loop A and loop B.
NOTE : This paragraph is only applicable to ionization type smoke
____ detectors P/N PAI2800-xx, GAI2800-xx and PAI2830-xx.
NOTE : In case ionization type SDs and photo-electric type SDs are
____ installed on the same aircraft do the trouble shooting procedure for photo-electric type SDs first. Start the procedure at an SD location adjacent to a photo-electric type SD, performing the measurements in the direction of the photo-electric type SD, see paragraph 4.D.(3). Perform the trouble shooting procedure as described, but not to the ionization type SDs. If all photo-electric type SDs are found serviceable do the trouble shooting procedure for ionization type SDs.
(1) If the fault continues:
- do a check of the SDCU PIN PROGRAMMING (Ref. TSM TASK 26-17-00-810-806).
(2) If the fault continues:
- replace the lavatory smoke detectors (Ref. AMM TASK 26-17-15-000-001) and (Ref. AMM TASK 26-17-15-400-001) in sequence (start from the first LAV S/D of SDCU CHANNEL 1, usually LAV A).
(3) If the fault continues:
- replace the cargo smoke detectors (Ref. AMM TASK 26-16-15-000-001) and (Ref. AMM TASK 26-16-15-400-001) in sequence (start from the first Cargo S/D of SDCU CHANNEL 1).
(4) If the fault continues:
- do a check and repair if necessary the wiring between the SDCU and all the connected lavatory and cargo compartment smoke detectors (Ref. ASM 26-17/01), (Ref. ASM 26-17/02) and (Ref. ASM 26-17/03).
「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1R EFF : 001-049, 051-099, 101-105, 151-199, ∞∞26-17-00∞∞∞∞∞∞∞∞∞∞Page 207
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Sequence of Smoke Detectors in Single-Loop Configuration
Figure 201/TASK 26-17-00-991-001
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(5) If the fault continues:
- do a check and repair the wiring of the related wiring which is shown in the WIRING REPORT (Ref. ASM 26-17/01), (Ref. ASM 26-17/02) and (Ref. ASM 26-17/03).
D. If the test gives the maintenance message SMOKE DET LOOP: R - Make sure that all electrical connectors are connected to the smoke R detectors in the loop.
NOTE : This paragraph is only applicable to photo-electric type smoke
____ detectors P/N PPA1100-xx, PPA1101-xx, PPA1200-xx, PPA1201-xx and PAPE2800-xx,
R (1) If the aircraft has ionization-type smoke-detectors and
R photo-electric-type smoke-detectors:
R (a) Do the troubleshooting procedure for the photo-electric-type
R smoke-detectors first.
R - Start the procedure at a smoke-detector adjacent to a
R photo-electric-type smoke-detector.
R - Measure in the direction of the photo-electric-type
R smoke-detector (refer to Para. 3 of this subtask).
R - Do the troubleshooting procedure as shown, ignore the
R ionization-type smoke-detectors.
R (b) If the troubleshooting for the photo-electric-type
R smoke-detectors is done and no failure is found:
R - Do the trouble shooting procedure for the ionization-type
R smoke-detectors.
R (2) If the fault continues: 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：A320 Trouble Shooting Manual 排故手册 FIRE PROTECTION 防火(84)
