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A
757
MAINTENANCE MANUAL
S 865-417
(2) Move the FLT DK temperature selector on the air conditioning control
panel, P5 to the OFF position.
(a) The FLT DK INOP light will come on.
(b) The FLT DECK TRIM VALVE display on the ECS maintenance page
will show the trim air modulating valve move to the closed
position (0.00-0.07).
F. Forward Zone (Auto Mode)
S 715-216
(1) Move the FWD CAB temperature selector on the air conditioning
control panel, P5 panel to AUTO W (4:00 position).
(a) The FWD DUCT TEMP display on the ECS maintenance page will
increase, but will not exceed 77 deg. C (170 deg. F).
(b) The FWD TRIM VALVE display on the ECS maintenance page will
show the trim air modulating valve move to the open position
(0.90-1.00).
S 715-217
(2) Move the FWD CAB temperature selector to the OFF position.
(a) The FWD CAB INOP light will come on.
(b) The FWD TRIM VALVE display on the ECS maintenance page will
show the trim air modulating valve move to the closed position
(0.00-0.07).
G. AFT Zone (Auto Mode)
S 715-218
(1) Move the Aft CAB temperature selector on the air conditioning
control panel, P5 panel to AUTO W (4:00 position).
(a) The AFT DUCT TEMP display on the ECS maintenance page will
increase, but will not exceed 77 deg. C (170 deg. F).
(b) The AFT TRIM VALVE display will show the trim air modulating
valve move to the open position (0.90-1.00).
S 715-219
(2) Move the AFT CAB temperature selector to the OFF position.
(a) The AFT CAB INOP light will come on.
(b) The AFT ZONE TRIM VALVE display on the ECS maintenance page
will show the trim air modulating valve move to the closed
position (0.00-0.07).
H. Standby Mode Test
ú
ú S 865-617
ú (1) Put the air/ground relay system in the ground mode
ú (AMM 32-09-02/201).
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757
MAINTENANCE MANUAL
S 715-220
(2) Move the L (R) PACK selector on the air conditioning control panel,
P5 to STBY C.
(a) Look at the ECS maintenance page.
1) The RAM IN DOOR display will show the ram air doors fully
open (0.00-0.07).
2) The L (R) TEMP VALVE display will show that the temperature
control valve is fully closed (0.0-0.05).
S 715-221
(3) Move the L (R) PACK selector on the P5 panel to STBY W.
(a) Look at the ECS maintenance page.
1) The L (R) RAM IN DOOR display will show that the ram air
doors are fully open (0.00-0.07).
2) The L (R) TEMP VALVE display will show the pack temperature
control valve open (0.95-1.00).
3) The L (R) PACK OUT display will show that the temperature
increases.
S 715-222
(4) Move the L (R) PACK selector on the P5 panel to STBY N.
(a) Look at the ECS maintenance page.
1) The L (R) RAM IN DOOR display will show that the ram air
doors are fully open (0.00-0.07).
2) The L (R) TEMP VALVE display will show that the temperature
control valve is fully closed (0.0-0.05).
(b) Look at the position indicator on the low limit valve.
1) Make sure the low limit valve moves to the open position.
2) If the low limit valve is still closed after 10 minutes,
then do these steps:
a) Move the L (R) PACK selector to AUTO.
b) Push the BIT VERIFY button on the pack temperature
controller in the E3 rack.
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