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MAINTENANCE MANUAL
(s) Install the electrical connector from the ground power source
on the supply fan and energize the supply fan.
NOTE:____ The current of the ground power source to the fan
must not be greater than 15 amps for fan P/N S210T170-XX
and must not be greater than 25 amps for fan P/N
4100149A.
(t) Make sure the exhaust fan is on.
(u) Make sure there is airflow at the E1/E2 rack.
(v) Set the EQUIP COOLING switch on the P5 overhead panel to OVRD.
(w) Make sure the supply fan is on and the exhaust fan is off.
(x) Make sure that after 4 minutes these messages are shown:
~..................................................
| EICAS caution | EQUIP COOLING |
....................................................
| EICAS status | EE CLNG OVRD |
2.........................…........................1
(y) Make sure the E6/E9 valve and smoke/override valve are open.
(z) Make sure the inboard exhaust valve, bypass valve and ground
exhaust valve are closed.
(aa) Remove the electrical connector DV448 from the smoke/override valve.
(ab) Make sure that after 32 seconds the status message SMOKE/OVRD VLV is shown on EICAS.
(ac) Install the electrical connector DV448 on the smoke/override valve.
(ad) Make sure the status message SMOKE/OVRD VLV is not shown on EICAS.
(ae) Make sure that these messages are shown: ~.................................................. | EICAS caution | EQUIP COOLING | .................................................... | EICAS status | EE CLNG OVRD | 2.........................…........................1
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MAINTENANCE MANUAL
(af) Set the EQUIP COOLING switch on the P5 overhead panel to NORM.
(ag) Make sure the exhaust fan is on.
(ah) Make sure the Status message EE CLNG OVRD is not shown on
EICAS. (ai) Do the "Put the Air/Ground Relay System Back in the Ground
Mode" task (Ref 32-09-02/201). (aj) Remove power to the supply fan. (ak) Remove the ground power source connector from the supply fan. (al) Install the electrical connector DB7436 on the supply fan. (am) Install the electrical connector DV444 on the inboard supply
valve. (an) Set the EQUIP COOLING switch on the P5 overhead panel to OVRD
then back to NORM. (ao) Make sure the supply fan is on. (ap) Make sure there are no equipment cooling messages shown on
EICAS.
S 735-029
(39) Do a test of the equipment cooling system in the pre-flight mode.
(a)
Make sure the EQUIP COOLING switch on the P5 overhead panel is set to NORM.
(b)
Make sure there are no equipment cooling messages shown on EICAS.
CAUTION: OPEN THE PROBE HEAT CIRCUIT BREAKERS THAT FOLLOW BEFORE
_______ YOU DO THE SUBSEQUENT STEP. FAILURE TO OPEN THE PROBE HEAT CIRCUIT BREAKERS CAN RESULT IN DAMAGE TO THE HEAT PROBES WHEN THE ENGINES ON SIGNAL IS GIVEN.
(c) Open these circuit breakers:
1) 6C33 AOA HEAT L
2) 6C34 AOA HEAT R
3) 6D28 PROBE HEAT TAT L
4) 6D29 PROBE HEAT TAT R
5) 6D30 PROBE HEAT PITOT L
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