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Current Output Test

CAUTION: Generator has 2 field terminals: generator field driver (Dark Green wire) and ASD relay output (Dark Green/Orange wire). DO NOT connect generator ASD relay output terminal to ground.
NOTE: Perform VOLTAGE DROP TEST before performing this test. Perform test soon after starting engine, as charging amperage will drop quickly. A volt/amp tester equipped with both a battery load control (carbon pile rheostat) and an inductive type pick-up clamp is required to perform the following test.
  1. Ensure battery is in good condition and is fully charged. Clean battery terminals (if necessary). Connect volt/amp tester leads to battery. Ensure carbon pile is in OFF position before connecting leads. Connect inductive pick-up clamp.
  2. Connect tachometer to engine. Start engine and raise engine speed to 2500 RPM. Slowly adjust rheostat control (load) on volt/amp tester until highest amperage reading is obtained. DO NOT allow voltage to drop less than 12 volts.
    NOTE: Depending on volt/amp tester manufacturer, load may be applied automatically. Refer to volt/amp tester manufacturer's instructions.
  3. Note reading on ammeter. Generator amperage reading should be more than the minimum amperage rating specification. See GENERATOR APPLICATION  table under DESCRIPTION. If amperage reading is less than minimum specification, go to step  5 . If amperage reading is more than minimum specification, go to next step.
  4. Rotate load control knob to OFF position. Continue to hold engine speed at 2500 RPM. Output amperage should change to less than 20 amps, indicating EVR circuity is okay and charging system is functioning properly. It may take several minutes for amperage to change. If output amperage does not change to less than 20 amps, go to SELF-DIAGNOSTIC TESTS  .
  5. Connect a jumper wire between ground and generator field driver terminal (Dark Green wire) on back of generator. See Figure . Start engine, and immediately reduce engine speed to idle. Adjust carbon pile and engine speed in increments until engine speed is 1250 RPM and voltmeter reads 15 volts. DO NOT allow voltage to exceed 16 volts.
  6. Note reading on volt/amp tester. Generator amperage reading should be more than the minimum amperage rating specification. See GENERATOR APPLICATION  table under DESCRIPTION. If amperage reading is less than minimum specification, replace generator. If amperage reading is more than minimum specification, a fault exists in EVR circuitry. Go to SELF-DIAGNOSTIC TESTS  .
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