- at the electrical connector (28HKA) do a check for a short circuit between pins 2 and 3, 2 and 4, 3 and 4 and between GND and pins 2, 3 and 4.

 (a) If there is no short circuit connect the electrical connector (28HKA).

 (b) If there is a short circuit repair the related wiring between:

 - the SEL-TEMPERATURE, AIR COND/FWD CABIN (28HK) to the ZC (8HK).

 - connect the electrical connector (28HKA).

 (16) If the fault continues:

 - disconnect the electrical connector (29HKA) from the SEL-TEMPERATURE, AIR COND/AFT CABIN (29HK).

 - at the electrical connector (29HKA) do a check for a short circuit between pins 2 and 3, 2 and 4, 3 and 4 and between GND and pins 2, 3 and 4.

 (a) If there is no short circuit connect the electrical connector (29HKA).
 「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, ∞∞21-63-00∞∞∞∞∞∞∞∞∞∞Page 272
 201-299, 301-399, Aug 01/05 CES (b) If there is a short circuit repair the related wiring between:

 - the SEL-TEMPERATURE, AIR COND/AFT CABIN (29HK) to the ZC (8HK).

 - connect the electrical connector (29HKA).

 - install the CONT-ZONE TEMPERATURE (8HK). (Ref. AMM TASK 21-63-34-000-001).

 - on the circuit breaker panel 122VU, close the CBIs 1HK (V17), 2HK (V18), 3HK (V19) and 4HK (V20).
 B. Do the test as given in the Para. 3.A.
 5. Close-up
________
 A. Put the aircraft back to its initial configuration.
 「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, ∞∞21-63-00∞∞∞∞∞∞∞∞∞∞Page 273
 201-299, 301-399, Aug 01/05 CES

 TASK 21-63-00-810-828

 DMU receives no Data from the ZC
 1. Possible Causes
_______________
 - DMU (1TV)

 - wiring

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 21-63-00-710-004 Operational Test of the Cockpit and Cabin Temperature
 Control with CFDS/MCDU AMM 31-36-00-710-001 Test of the DMU (1TV) AMM 31-36-34-000-001 Removal of the Data Management Unit (DMU) (1TV) AMM 31-36-34-400-001 Installation of the Data Management Unit (DMU) (1TV) ASM 21-63/03 ASM 31-37/01
 3. Fault Confirmation
__________________
 A. Do the Test of the DMU (Ref. AMM TASK 31-36-00-710-001).
 NOTE : Make sure that the circuit breakers 1HK, 2HK, 3HK and 4HK are
____
 closed during the test.

 4. Fault Isolation
_______________
 A. If the test gives the maintenance message NO ZONE CTRL DATA:
 - do the operational test of the cockpit and cabin temperature-control system with CFDS/MCDU (Ref. AMM TASK 21-63-00-710-004).
 (1) If the test gives a different maintenance message, you can find the related trouble shooting procedure in the applicable Page Block 101.

 (2) If the fault continues:

 - replace the DMU (1TV) (Ref. AMM TASK 31-36-34-000-001) and (Ref. AMM TASK 31-36-34-400-001).

 (3) If the fault continues:

 - do a check and repair the wiring of the signal ARINC 429 XTR EXT from the ZC (8HK) to the DMU (1TV) (Ref. ASM 21-63/03) and (Ref. ASM 31-37/01).
 B. Do the test given in para. 3.
 「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, ∞∞21-63-00∞∞∞∞∞∞∞∞∞∞Page 274
 201-299, 301-399, Aug 01/05 CES

 5. Close-up
________
 A. Put the aircraft back to its initial configuration.

 「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, ∞∞21-63-00∞∞∞∞∞∞∞∞∞∞Page 275
 201-299, 301-399, Aug 01/05 CES

 **ON A/C ALL
 TASK 21-63-00-810-829
 ZC receives no Data from the CFDS
 1. Possible Causes
_______________
 - CONT-ZONE TEMPERATURE (8HK)

 - wiring

 2. Job Set-up Information
______________________
 A. Referenced Information
　
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