Alpha XM 6015 Series Operations Instructions download pdf (Page 54)

8. MAINTENANCE

8.8 APM Manual Self-test

On units equipped with the APM (Automatic Performance Monitor) logic upgrade, self-

test can be manually activated to trouble-shoot the batteries and inverter. Press the

"TEST/RESET" switch once. The yellow "TEST IN PROGRESS" LED will come ON to

indicate test mode. If a failure occurs, either the red "CHECK BATTERIES" or "CHECK

INVERTER" LED will flash to indicate the circuit that has failed. To manually exit self-test

and return the module to AC LINE operation, press the "TEST/RESET" switch once.

8.8.1 "TEST IN PROGRESS" (yellow) LED ON

The yellow "TEST IN PROGRESS" LED indicates that the unit is in self-test mode.

The duration of the test is determined by the switch setting on the APM logic upgrade.

8.8.2 "CHECK BATTERIES" (red) LED FLASHING

If the red "CHECK BATTERIES" LED is flashing, it indicates that one or more of the

batteries are unable to carry the load or that a connection in the battery circuit is malfunc-

tioning. Make sure that the battery breaker on the side of the power module is not tripped.

Check the battery terminals and crimped connectors on the battery cable kit. Measure

individual battery voltages under load and replace the faulty battery if necessary. Reacti-

vate the self-test mode to verify that the problem has been corrected.

8.8.3 "CHECK INVERTER" (red) LED FLASHING

If the red "CHECK INVERTER" LED is flashing, it indicates that the inverter has failed

to produce AC at the output. Check the AC output fuse on the side of the power module

and replace it if necessary. Reseat or replace the main circuit assembly. Reseat or

replace the plug-in logic upgrade. Reactivate self-test to verify that the problem has been

corrected. If the power module continues to fail self-test, it should be replaced.

8.9 Main Circuit Module and Logic Board Maintenance

SERVICE AND CALIBRATION SHOULD ONLY BE PERFORMED BY A QUALIFIED

TECHNICIAN OR ALPHA SERVICE CENTER.

1. Carefully remove the Main Circuit Module assembly (See section 6.8).

2. Inspect the assembly for signs of dust or corrosion. Note: Circuit boards and logic up-

grades are static-sensitive and should be handled with care. Clean with a damp rag

or soft, non-metallic brush if necessary and allow to dry completely.

3. Clean the card edge connector with an alcohol-based cleaner (such as greaseless TV

tuner cleaner). Also check the mating card edge connector inside the power module

and clean if necessary.

4. Carefully tighten any screws used for mounting components to the heatsink. Make

sure that plug-in attachments such as APM or USM logic upgrades are firmly seated.

Do not over-tighten semiconductor mounting hardware.

5. If the module is equipped with a SDD (Standby Data Display), check the lithium

battery, located on the front of the main board, and replace if necessary. Use Alpha

#185-003-10, (3VDC).

6. Re-install the Main Circuit Module assembly and test the unit for proper operation

(See section 7.1).

8.10 Fuse Replacements

BATTERY CHARGER FUSE

The XM Series power module contains 1 internal fuse (F301) located near the

heatsinks on the Main Module assembly. This 10 Amp slow-blow fuse protects the DC

charger circuit. If the batteries appear under-charged, first check the terminal connections

and measure the voltage at the "BATTERY INPUT" connector. If no charge voltage is

present, check the fuse. If it is open, there may be a problem with the battery charger.

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Alpha XM 6015 Series Operations Instructions Page 54

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