EMER GEN Voltage and Frequency Indications Lost or Incorrect

TASK 24-24-00-810-804-A
EMER GEN Voltage and Frequency Indications Lost or Incorrect

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
TSM TASK 24-00-00-810-803-A	Circuit Breaker Tripped and/or C/B TRIPPED Warning
AMM 24-24-00-710-001	Operational Test of the Emergency Generation System
ASM 242401
AMM 24-24-34-000-001	Removal of the CSM/G Control Unit
AMM 24-24-34-400-001	Installation of the CSM/G Control Unit
AMM 24-24-51-000-001	Removal of the Constant Speed Motor/Generator (CSM/G)
AMM 24-24-51-400-001	Installation of the Constant Speed Motor/Generator (CSM/G)
ASM 243501

3. Fault Confirmation
Subtask 24-24-00-710-056-A

A. Job Set-up
Do the operational test of the emergency generation system AMM 24-24-00-710-001.

Subtask 24-24-00-710-066-A

B. Test

ACTION	RESULT
1.On the ECAM control panel: push the ELEC key to get the ELEC page.	If on the lower ECAM DU, the voltage indication or the frequency indication shows in amber: do the trouble shooting given in Para. 4.B.
	If on the lower ECAM DU, amber crosses replace the voltage and the frequency indications: do the trouble shooting given in Para. 4.C.

4. Fault Isolation
Subtask 24-24-00-865-050-A

A. Table of the circuit breakers used in this procedure:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
106VU	EMER/GEN/REF	27WV	B05
106VU	AC ESS/BUS/EMER/CNTOR/SPLY	15PC	C08

Subtask 24-24-00-810-065-A

B. If the test confirms the fault:

(1) If the fault continues:

(2) If the fault continues:

(3) If the fault continues:

do a check and repair the wiring ASM 242401 between:
. the pin A/S of the CSM/G control unit (1XE) and the pin T1 of the GLC EMER (2XE)
. the pin A/R of the CSM/G control unit (1XE) and the pin T2 of the GLC EMER (2XE)
. the pin A/P of the CSM/G control unit (1XE) and the pin T3 of the GLC EMER (2XE).

Subtask 24-24-00-810-053-B

C. If the test confirms the fault:

(1) If the circuit breaker is closed:

(a) If there is 115VAC:

Do a check and repair the wiring between ASM 243501:
. the pin 2 of the circuit breaker (27WV) and the first branch point
. the branch point and the pin AE/8B of the SDAC1 (1WV1) and the pin AE/8B of the SDAC2 (1WV2).

(b) If there is no 115VAC:

Do a check and repair the wiring between the pin 1 of the circuit breaker (27WV) and the pin 1 of the circuit breaker (15PC) ASM 243501.

(2) If the circuit breaker is open:

(a) If the fault continues:

Subtask 24-24-00-710-057-A

D. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:26:42 UTC