(2)
 Close the access door 811.

 (3) Remove the access platform(s). Subtask 21-61-34-862-050
 B. De-energize the ground service network
 (Ref. TASK 24-42-00-862-001).

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 CONTROLLER - AIR CONDITIONING SYSTEM (47HH,57HH) - REMOVAL/INSTALLATION
_______________________________________________________________________ TASK 21-61-34-000-002 Removal of the Air-Conditioning System Controller (47HH, 57HH)
 1.
 Reason for the Job

__________________
 Self Explanatory

 2.
 Job Set-up Information

______________________
 A. Fixtures, Tools, Test and Support Equipment
 -------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific blanking caps
 No specific circuit breaker(s) safety clip(s)
 No specific access platform 1 m (3 ft. 3 in.)

 B. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
24-42-00-861-001  Energize the Ground Service Network from the External Power 21-61-34-991-002 Fig. 401
 3. Job Set-up
__________ Subtask 21-61-34-861-051
 A. Energize the ground service network
 (Ref. TASK 24-42-00-861-001).

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 Subtask 21-61-34-865-053
 B. Open, safety and tag this(these) circuit breaker(s):
RRR R  -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------FOR 47HH 49VU AIR COND/TEMP CTL/SYS 1 CHAN B/28VDC 52HH D08 122VU AIR COND/TEMP CTL SYS 1/CHAN A/115VAC 49HH X22 122VU AIR COND/TEMP CTL SYS 1/CHAN A/28VDC 51HH X21 122VU AIR COND/TEMP CTL SYS 1/CHAN B/115VAC 50HH Y18 FOR 57HH 122VU AIR COND/TEMP CTL SYS 2/CHAN A/115VAC 53HH W22 122VU AIR COND/TEMP CTL SYS 2/CHAN A/28VDC 55HH W21 122VU AIR COND/TEMP CTL SYS 2/CHAN B/28VDC 56HH Y21 122VU AIR COND/TEMP CTL SYS 2/CHAN B/115VAC 54HH Y20 
Subtask 21-61-34-010-052
 C. Get Access
 (1) Put the access platform in position at the access door 811.
 (2) Open the access door 811.
 4. Procedure_________
 Subtask 21-61-34-020-051
 A. Removal of the Air-Conditioning System Controller (ACSC) (Ref. Fig. 401/TASK 21-61-34-991-002)
 (1) Loosen the nuts (4).
 (2) Lower the nuts (4).
 (3) Pull the ACSC (1) on its rack (3) to disconnect the electrical connectors (2).
 (4) Remove the ACSC (1) from its rack (3).
 (5) Put blanking caps on the disconnected electrical connectors. 

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 Air-Conditioning System Controller
 Figure 401/TASK 21-61-34-991-002

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 TASK 21-61-34-400-002
 Installation of the Air-Conditioning System Controller (47HH, 57HH)

 1.
 Reason for the Job

__________________
 Self Explanatory

 2.
 Job Set-up Information

______________________
 A. Fixtures, Tools, Test and Support Equipment
 -------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific  access platform 1 m (3 ft. 3 in.)
 B. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
21-61-00-710-001  Operational Test of the Pack Temperature-Control System 24-42-00-861-001 Energize the Ground Service Network from the External Power 24-42-00-862-001 De-energize the Ground Service Network Supplied from the External Power 21-61-34-991-002 Fig. 401
 3. Job Set-up
__________ Subtask 21-61-34-860-051
 A. Aircraft Maintenance Configuration
 (1) Make sure that the ground service network is energized
 (Ref. TASK 24-42-00-861-001).
　
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