4. Fault Isolation
_______________
R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299,
A. If the test gives the maintenance message FLOW SEL:
- replace the CTL SW-AIR COND/PACK FLOW (5HB).
NOTE : In this procedure:
____
- the CTL SW-AIR COND/PACK FLOW (5HB) is referred to as the PACK FLOW SELECTOR,
- for the subsequent aircraft wiring (Ref. ASM 21-51/01).
(1) If the fault continues:
(a) On the AIR COND panel 30VU:
- do a check for continuity of the RESISTOR (18HB) between PACK FLOW SELECTOR pins 2 and 3.
(b) If there is no continuity:
- replace the RESISTOR (18HB).
(2) If the fault continues:
(a) On the AIR COND panel 30VU:
- do a check for continuity of the RESISTOR (19HB) between PACK FLOW SELECTOR pins 3 and 4.
(b) If there is no continuity:
- replace the RESISTOR (19HB).
(3) If the fault continues:
- replace the CONT-ZONE TEMPERATURE (8HK).
(Ref. AMM TASK 21-63-34-000-001) and,
(Ref. AMM TASK 21-63-34-400-001).
(4) If the fault continues:
- do a check and repair the wiring: from PACK FLOW SELECTOR (5HB) pin 2 to ZC 1 (8HK) pin A/15D, from PACK FLOW SELECTOR (5HB) pin 4 to ZC 1 (8HK) pin A/14D, from PACK FLOW SELECTOR (5HB) pin 1 to ZC 1 (8HK) pin A/13D.
R
R **ON A/C 301-399,
A. If the test gives the maintenance message FLOW SEL:
- replace the PUSHBUTTON SWITCH-AIR COND/ECON FLOW (5HB).
NOTE : In this procedure:
____
- the PUSHBUTTON SWITCH-AIR COND/ECON FLOW (5HB) is referred to as the PACK FLOW SWITCH,
「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 ∞∞21-51-00∞∞∞∞∞∞∞∞∞∞Page 202
Aug 01/05 CES
- for the susequent aircraft wiring (Ref. ASM 21-51/01).
(1) If the fault continues:
- do a check for continuity of the RESISTOR (18HB) from ECON FLOW SWITCH (5HB) pin A/B1 to pin A/B2.
(a) If there is no continuity:
- replace the RESISTOR (18HB).
(2) If the fault continues:
- do a check for continuity of the RESISTOR (19HB) from ECON FLOW SWITCH (5HB) pin A/B2 to ZONE CONT (8HK) pin AA/14D.
(a) If there is no continuity:
- replace the RESISTOR (19HB).
(3) If the fault continues:
- replace the CONT-ZONE TEMPERATURE (8HK).
(Ref. AMM TASK 21-63-34-000-001) and,
(Ref. AMM TASK 21-63-34-400-001).
(4) If the fault continues:
- do a check and repair the wiring: from ECON FLOW SWITCH (5HB) pin A/B1 to ZC (8HK) pin AA/15D, from ECON FLOW SWITCH (5HB) pin A/B2 to ZC (8HK) pin AA/14D, from ECON FLOW SWITCH (5HB) pin A/B3 to ZC (8HK) pin AA/13D.
R **ON A/C 401-499,
R A. If the test gives the maintenance message FLOW SELECTOR(5HB):
R - replace the CTL SW-AIR COND/PACK FLOW (5HB) (Ref. ASM 21-51/01).
R NOTE : In this procedure:
____ R - the CTL SW-AIR COND/PACK FLOW (5HB) is referred to as the PACK R FLOW SELECTOR,
R (1) If the fault continues:
R - for the subsequent aircraft wiring (Ref. ASM 21-51/01).
R (a) On the AIR COND panel 30VU:
R - do a check for continuity of the RESISTOR- (18HB) between PACK
R FLOW SELECTOR pins 2 and 3.
R (b) If there is no continuity:
R - replace the RESISTOR- (18HB).
R (2) If the fault continues:
R (a) On the AIR COND panel 30VU:
R - do a check for continuity of the RESISTOR- (19HB) between PACK
R FLOW SELECTOR pins 3 and 4.
「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 : 301-399, 401-499, ∞∞21-51-00∞∞∞∞∞∞∞∞∞∞Page 203
Aug 01/05 CES
R (b) If there is no continuity:
R - replace the RESISTOR- (19HB).
R (3) If the fault continues:
R - replace the CONT-AIR COND SYSTEM 1 (47HH), (Ref. AMM TASK 21-61-34-
R 000-002) and (Ref. AMM TASK 21-61-34-400-002).
R (4) If the fault continues:
R - do a check and repair the wiring from:
R - the PACK FLOW SELECTOR (5HB) to the ACSC1 (47HH).
**ON A/C ALL
B. Do the test as given in the Para. 3.A.
5. Close-up________
A. Put the aircraft back to its initial configuration.
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本文链接地址：A320 Trouble Shooting Manual 排故手册 AIR CONDITIONING 空调1(129)
