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TROUBLESHOOTING & REPAIR
PRIMARY POWER BOARD RESISTANCE TEST AND
CAPACITOR VOLTAGE TEST (continued)
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6.Check for the appropriate voltages outlined in Table F.3.
NOTE: Voltages may vary with the input line voltage.
NOTE: If the capacitor voltage is too high (over 400 VDC) or too low (less than 220 VDC) the control board will deactivate relay CR1 + CR2. This will prevent output.
7.If the test voltages do not meet the expect- ed values as listed in Table F.3, the capaci- tors or other components on the power board may be faulty. Replace.
NOTE: If the capacitor voltages are NOT bal- anced within 20 VDC, the capacitors may need “conditioning.” See the Maintenance section.
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TABLE F.3 - CAPACITOR VOLTAGES
| EXPECTED VOLTS |
| DC AT CAPACITOR |
INPUT APPLIED | TERMINALS |
|
|
460VAC | 325VDC |
440VAC | 311VDC |
415VAC | 293VDC |
380VAC | 269VDC |
|
|
NOTE: If Capacitor C1 is found to be defective, both Capacitors C1 and C2 must be replaced at the same time. The capacitors must be replaced in matched sets.
