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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. 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.
