TM- 9-4910-663-34
Table 2-5. TROUBLESHOOTING (Continued)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
If input voltage is normal but output voltage is not normal, replace circuit breaker switch CB1.
Step 6. Using AC voltmeter, check for 230/460 volts AC between output terminals of drive reversing switch
S1 with circuit breaker switch CB1 set to ON position. Then, set circuit breaker switch CB1 to OFF
position, set drive reversing switch S1 to its opposite setting, set circuit breaker switch CB1 back to
ON position, and repeat voltage measurement.
If AC voltage is any value other than 230/460 volts, replace drive reversing switch S1.
b. WORK LAMP FAILS TO LIGHT WHEN WORK LIGHT SWITCH S5 SET TO ON POSITION.
Step 1. Check to make sure that circuit breaker switch CB1 and CIRCUIT BREAKERS CB2 DRIVE
CONTROL circuit breaker are both set to ON position.
Set circuit breakers to ON position.
Step 2. Remove work lamp DS3 and check for continuity with ohmmeter.
Replace work lamp DS3 if continuity is not obtained. If continuity is obtained, replace work light
switch S5.
c. VARIDRIVE DOES NOT START WHEN START SWITCH S3 IS PRESSED.
Step 1. Check to make sure that circuit breaker CB1 is set to ON position.
Set circuit breaker switch CB1 to ON position.
Step 2. Check to make sure that high voltage compartment door is closed.
Close high voltage compartment door.
Step 3. Check to see that drive starter MS1 is not tripped.
Press overload reset on drive starter MS1 in.
Change 1 2-17
