AC/DC power/current limiters/inverters

TM 1-1510-223-MTF

PROCEDURE

TROUBLESHOOTING

REFERENCE

NOTE

For maximum cooling on the ground, turn the PNEU &

ENVIRO BLEED AIR valve switches to PNEU ONLY position.

Verify airflow is present from aft cockpit eyeball outlets to

ensure sufficient cooling for mission equipment.

Check may also be accomplished by switching the # 1

GENERATOR OFF and leaving the #2 GENERATOR ON.

* 4.

AC/DC power/current limiters/inverters - Check as follows:

# 1 GENERATOR switch - ON.

# 2 GENERATOR switch - OFF.

# 1 and # 2 INVERTER switches - ON.

Check for the following indications:

(1) # 1 and # 2 INVERTER annunciator lights

not illuminated.

* (2) AC frequency - 394 to 406 Hz.

* (3) AC voltage - 104 to 124 VAC.

* (4) DC voltage - 28 to 28.5 VDC.

(5) Battery ammeter

Check

for

charge

indication.

NOTE

This procedure checks both 400 and 500 ampere current

limiters that tie the aircraft bus systems together.

# 2 GENERATOR switch - ON.

AUTO PLT POWER switch - ON.

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