B. Do the test as given in the Para. 3.A.
 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞21-21-00∞∞∞∞∞∞∞∞∞∞Page 209
 Feb 01/05 CES

 TASK 21-21-00-810-803

 Cabin Recirculation Fault (Fan 2 / Supply)
 1. Possible Causes
_______________
 - FILTER-RECIRCULATION (4013HM)

 - P/BSW-VENTILATION/CAB FANS (4HG)

 - RELAY-FAN FAULT SUPPRESS (16HG)

 - RELAY-R FAN POWER (6HG)

 - RELAY-R FAN CONTROL (8HG)

 - RELAY-R FAN FAULT (9HG)

 - FAN-RECIRCULATION (14HG)

 - wiring

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 21-21-00-710-001 Operational Test of the Cabin Recirculation Fans 14HG
 and 15HG. AMM 21-21-41-000-001 Removal of the Recirculation Filter 4012HM (4013HM) AMM 21-21-41-400-001 Installation of the Recirculation Filter 4012HM
 (4013HM) AMM 21-21-51-000-001 Removal of the Cabin Recirculation Fans 15HG and 14HG AMM 21-21-51-400-001 Installation of the Cabin Recirculation Fans 15HG and
 14HG
 ASM 21-21/01
 ASM 21-63/01

 3. Fault Confirmation
__________________
 A. Do the operational test of the cabin recirculation fans 14HG and 15HG (Ref. AMM TASK 21-21-00-710-001).
 4. Fault Isolation
_______________
R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 301-399,
 A. If the test gives the maintenance message RECIRC FAN 2 OR SPLY:
 - make sure that the recirculation filter (4013HM) housing and the adjacent area is clean.

 - remove the FILTER-RECIRCULATION (4013HM) (Ref. AMM TASK 21-21-41-000-001).

 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞21-21-00∞∞∞∞∞∞∞∞∞∞Page 210
 Aug 01/05 CES

 (1) If the recirculation fan (14HG) operates correctly:

 - do a check of the recirculation filter (4013HM) for contamination.
 (a) If the filter is clogged:

 - replace the FILTER-RECIRCULATION (4013HM) (Ref. AMM TASK 21-21-41-000-001) and (Ref. AMM TASK 21-21-41-400-001).

 (b) If the filter is not clogged:

 - install the FILTER-RECIRCULATION (4013HM) (Ref. AMM TASK 21-21-41-400-001).

 (2) If the recirculation fan (14HG) does not operate:

 - do a check of the P/BSW-VENTILATION/CAB FANS (4HG) and replace it if necessary (Ref. ASM 21-21/01).
 (a) If the fault continues:

 - do a check of the RELAY-FAN FAULT SUPPRESS (16HG) and replace it if necessary (Ref. ASM 21-21/01).

 (b) If the fault continues:

 - do a check of the RELAY-R FAN POWER (6HG) and replace it if necessary (Ref. ASM 21-21/01).

 (c) If the fault continues:

 - do a check of the RELAY-R FAN CONTROL (8HG) and replace it if necessary (Ref. ASM 21-21/01).

 (d) If the fault continues:

 - do a check of the RELAY-R FAN FAULT (9HG) and replace it if necessary (Ref. ASM 21-21/01).

 (e) If the fault continues:

 - replace the FAN-RECIRCULATION (14HG) (Ref. AMM TASK 21-21-51-000-001) and (Ref. AMM TASK 21-21-51-400-001).

 (f) If the fault continues:

 - do a check and repair the wiring (Ref. ASM 21-21/01) and (Ref. ASM 21-63/01) from:

 - the FAN (14HG) to the CB (3HG),

 - the FAN (14HG) to the CB (11HG),

 - the FAN (14HG) to ground,

 - the RELAY (8HG) to the RELAY (6HG),

 - the RELAY (8HG) to ground,

 - the RELAY (9HG) to the RELAY (6HG),

 - the RELAY (9HG) to ground,

 - the RELAY (9HG) to the ZC (8HK),

 - the RELAY (16HG) to the SW (4HG) and,

 - the RELAY (16HG) to ground.

 「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, 101-149, 151-199, ∞∞21-21-00∞∞∞∞∞∞∞∞∞∞Page 211
 201-299, 301-399, Aug 01/05 CESR **ON A/C 401-499,

 A. If the test gives the maintenance message RECIRC FAN 2 OR SPLY(14HG):
 - make sure that the recirculation filter (4013HM) housing and the adjacent area is clean.
　
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