If the Pilot Light Works and the Interior Light Does Not (Cont)

TM 10-4110-262-13&P

0018 00

WARNING

The RU electrical system includes high voltage

components that, if contacted, may cause serious injury or

death. Failure to comply may result in serious injury or

death of personnel.

4. Open the RU electrical enclosure and check voltage between the load sides of Fuses 6 and 7. If no

voltage is detected, go to Step 3 on the WP 0018 00-1. If 110 120 VAC is detected, replace the IC

power cord. Reconnect power to the RU and check voltage at the IC power entry connector. If

voltage is present, return the ADR-300 to service.

5. Check voltage between the line sides of Fuses 6 and 7. If 110 120 VAC is not detected, go to Step

6. Disconnect power from the RU.

7. Inspect Fuses 5, 6 and 7 in the RU electrical enclosure. Replace blown fuses as required.

Reconnect power to the RU and check voltage at the IC power entry connector. If voltage is present,

return the ADR-300 to service.

8. Check voltage between the three line-side terminals of the compressor motor contactor (CMC Cool).

Voltage between each pair of terminals (L1-L2, L2-L3, L1-L3) should be 208 VAC. If all three pairs

show full voltage, go to Step 14.

9. Disconnect power from the RU.

10. Remove the cannon plug from the electrical connector box for the main power connection to the RU.

a. Remove four mounting bolts from the cannon plug mounting flange.

b. Pull the plug to the extent of the attached wires.

Inspect all wires for good connections to terminals, damaged insulation or broken/burned

conductors.

0018 00-4