Ametek Silicon Diode Ferroresonant Transformer Type Battery Charger 965H3-12E

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

Electrical Connections Inspection

Check and tighten all electrical connections

Check for broken wiring or damaged insulation on wiring

WARNING: ELECTRICAL SHOCK HAZARD

Ensure internal parts are clean and dry to prevent transformer shorting

Replace all charger cabinet panels after servicing to ensure proper cooling and protection

Heed WARNING in Silicon Diode Testing section

Connect leads of ohmmeter to capacitor terminals

Observe ohmmeter pointer deflection

Determine capacitor status based on deflection

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.

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 after cleaning?