W DOC AIRBUS | AMM A320F

Reactivation of the Window Heat Computer (WHC)

TASK 30-42-00-440-001-A
Reactivation of the Window Heat Computer (WHC)

FIN: 2DG1
FIN: 2DG2
1. Reason for the Job
MMEL 30-42-01A
WINDOW HEAT COMPUTER
  • To do the trouble shooting of the deactivated WHC.
  • To do a check of the two WHCs for correct operation.
  • To put the two WHCs in the normal configuration.
2. Job Set-up Information
 A. Fixtures, Tools, Test and Support Equipment
REFERENCE
QTY
DESIGNATION
No specific
AR
SAFETY CLIP - CIRCUIT BREAKER
 B. Referenced Information
REFERENCE
DESIGNATION
TASK 24-41-00-861-002-A
Energize the Aircraft Electrical Circuits from the External Power
TASK 24-41-00-861-002-A-01
Energize the Aircraft Electrical Circuits from the APU
TASK 24-41-00-861-002-A-02
Energize the Aircraft Electrical Circuits from Engine 1(2)
TASK 24-41-00-862-002-A
De-energize the Aircraft Electrical Circuits Supplied from the External Power
TASK 24-41-00-862-002-A-01
De-energize the Aircraft Electrical Circuits Supplied from the APU
TASK 24-41-00-862-002-A-02
De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2)
TASK 31-60-00-860-001-A
EIS Start Procedure
TASK 31-60-00-860-002-A
EIS Stop Procedure
3. Job Set-up
Subtask 30-42-00-861-053-A
A. Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
Subtask 30-42-00-869-062-A
B. Do the EIS start procedure (upper ECAM DU and lower ECAM DU only)
(Ref. AMM TASK 31-60-00-860-001).
4. Procedure
Subtask 30-42-00-865-058-A
A. Open, safety and tag this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C ALL
FOR FIN: 2DG1 (WHC1)
122VUANTI ICE/WINDOWS/L4DG1X14
122VUANTI ICE/WHC/15DG1X13
123VUANTI ICE/L/WHSLD1DG1AF10
FOR FIN: 2DG2 (WHC2)
122VUANTI ICE/WINDOWS/R4DG2W14
122VUANTI ICE/WHC/25DG2W13
123VUANTI ICE/R/WHSLD1DG2AF03
Subtask 30-42-00-210-051-A
B. Check of the Warning Messages of the Fixed and Sliding Windows
   (1) On the Upper ECAM DU make sure that the warning messages:
  • A.ICE L WSHLD HEAT
  • A.ICE R WSHLD HEAT
  • A.ICE L WINDOW HEAT
  • A.ICE R WINDOW HEAT
come into view.
Subtask 30-42-00-865-059-A
C. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C ALL
FOR FIN: 2DG1 (WHC1)
122VUANTI ICE/WINDOWS/L4DG1X14
122VUANTI ICE/WHC/15DG1X13
123VUANTI ICE/L/WHSLD1DG1AF10
FOR FIN: 2DG2 (WHC2)
122VUANTI ICE/WINDOWS/R4DG2W14
122VUANTI ICE/WHC/25DG2W13
123VUANTI ICE/R/WHSLD1DG2AF03
5. Close-up
Subtask 30-42-00-869-063-A
A. Do the EIS stop procedure
(Ref. AMM TASK 31-60-00-860-002).
Subtask 30-42-00-862-053-A
B. De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).
[Rev.10 from 2021] 2026.04.01 00:30:54 UTC
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