Manual 0-2972
4-17
TROUBLESHOOTING
D. Input Diode Test
Check Input Diode for shorted input diode.
Remove AC power and with an ohmmeter set on the diode
range make the following checks on Main PC Board:
For 208/230V Power Supplies:
Meter (+) Meter (-) Indication
E2
E11
Diode Drop
E11
E2
Open
E12
E2
Diode Drop
E2
E12
Open
For 400V and 460V Power Supplies:
Meter (+) Meter (-) Indication
E1
E11
Diode Drop
E11
E1
Open
E2
E11
Diode Drop
E11
E2
Open
E3
E11
Diode Drop
E11
E3
Open
E12
E1
Diode Drop
E1
E12
Open
E12
E2
Diode Drop
E2
E12
Open
E12
E3
Diode Drop
E3
E12
Open
The meter should indicate a diode drop in one direction
and an open in the other direction for each check.
If Input Bridge Diode is shorted, make the following checks
with an ohmmeter at the Main Contactor (W1):
Meter (+)
Meter (-) Indication
L1
T1
Open
L2
T2
Open
400/460V
Only
L2
T1
Open
All
Voltages
If any test has resistance, then replace the Main Contactor
also.
E. Main Input Contactor (W1) Test
Reconnect power and observe proper start-up procedure.
AC Indicator on the Front Panel should be ON. If indica-
tor is OFF there is no voltage to the Power Supply or an
overvoltage condition exists.
1.
If AC Indicator is OFF, check for proper input AC
voltage at the Main Contactor. If voltage is not
correct (refer to following chart), check for proper
AC voltage at the main power source.
Input
Power
Test Points
Voltage
Range
208/230V
L1, L2
187-253VAC
400V
L1, L3
360-440VAC
460V
L1, L3
414-506VAC
CutMaster 51 Input Contactor Voltage Ranges
208/230V Power Supply Input Contactor:
A-03223
Input
Cable (L1)
Input
Cable (L2)
Label
Wire #11
Wire #12
400V and 460V Power Supply Input Contactor:
A-03224
Main Contactor
L1 L2 L3
T1
T2
T3
To E3
Connections to
Main PCB
To E1
To E2
Input Side
Label
#11
#12
L3
L2
L1
Содержание 51 CUTMASTER
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