No data from AIR COND Controller Fault

TASK 21-58-00-810-820-A
No data from AIR COND Controller Fault

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
ASM 215301
AMM 21-58-00-710-001	Operational Test of the Conditioned Service Air System without Bleed Air
AMM 21-58-34-000-001	Removal of the CSAS Control Unit
AMM 21-58-34-400-001	Installation of the CSAS Control Unit
AMM 21-63-00-710-004	Operational Test of the Cockpit and Cabin Temperature Control with CFDS/MCDU
ASM 216303

3. Fault Confirmation
Subtask 21-58-00-710-088-A ** ON A/C NOT FOR ALL

A. Do the operational test of the conditioned service air system without bleed air AMM 21-58-00-710-001.

NOTE: Make sure that the circuit breakers 49HH, 50HH, 51HH and 52HH are closed during the test.

Subtask 21-58-00-710-088-C ** ON A/C NOT FOR ALL

A. Do the operational test of the conditioned service air system without bleed air AMM 21-58-00-710-001.

NOTE: Make sure that the circuit breakers 1HK, 2HK, 3HK and 4HK are closed during the test.

4. Fault Isolation
Subtask 21-58-00-810-081-A ** ON A/C NOT FOR ALL

A. If the test gives the maintenance message NO DATA FROM AIR COND CTL:

do the operational test of the cockpit and cabin temperature-control system with CFDS/MCDU AMM 21-63-00-710-004.

(1) If the test gives a different maintenance message, do the related trouble shooting procedure.
(2) If the fault continues:

(3) If the fault continues:

do a check and repair the wiring of the signal ARINC 429 XTR EXT from the ACSC1 (47HH) to the CSAS CONTROL UNIT (100HW) ASM 216303 and ASM 215301.

Subtask 21-58-00-810-081-C ** ON A/C NOT FOR ALL

A. If the test gives the maintenance message NO DATA FROM AIR COND CTL:

do the operational test of the cockpit and cabin temperature-control system with CFDS/MCDU AMM 21-63-00-710-004.

(1) If the test gives a different maintenance message, do the related trouble shooting procedure.
(2) If the fault continues:

(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 CSAS CONTROL UNIT (100HW) ASM 216303 and ASM 215301.

Subtask 21-58-00-710-089-A ** ON A/C NOT FOR ALL

B. Do the test as given in the Para. 3.A.

[Rev.8 from Aug 2018] 2026.04.04 04:24:50 UTC