Ametek Silicon Diode Ferroresonant Transformer Type Battery Charger 750H3-24E

Electrical Connections Inspection

Check and tighten all electrical connections to eliminate unnecessary losses.

Inspect for broken wiring or damaged insulation on wiring.

Ensure all charger cabinet panels are replaced after servicing to assure proper cooling and protection of internal components.

Verify all cabinet panels are replaced to protect personnel from hazardous voltages.

Ensure the charger is turned off and unplugged

Select the cleaning method used

Wipe and blow out all dirt from the unit's interior components

Is the unit clean, dry, and well ventilated?

Heed WARNING in Silicon Diode Testing section

Connect leads of ohmmeter (set to highest scale) to capacitor terminals

Observe ohmmeter pointer deflection

Does the pointer deflect, indicating the capacitor is being charged?

Does the pointer deflect in the opposite direction, indicating partial discharge?

If there is no deflection, the capacitor is 'open' and must be replaced

If the meter needle moves and stops at one value, replace the capacitor

Ensure no bad connections or damage to charger is affecting the charging process.

Verify proper charging procedure has been followed.

Turn OFF and remove fuses of disconnect switch supplying AC power to charger.

Check for voltage on capacitors.

Discharge capacitors through insulated screwdriver if there is any voltage reading.

Locate charging rate adjustment label inside charger cabinet.

WARNING: ELECTRICAL SHOCK HAZARD

Turn OFF and remove fuses of disconnect switch supplying AC power to charger

Check for voltage on capacitors

Discharge capacitors through insulated screwdriver if there is any reading

Disconnect one diode lead to isolate diode from electrical circuitry

Use a good quality ohmmeter to measure resistance values