3-11
MAINTENANCE
Service Manual
Three-Phase
Check # 1
Set power switch S1 of OFF (0)
Measure resistance between the conductors
connected to link box terminal TB1-1 & TB1-2, TB1-1 &
TB1-3, and TB1-2 & TB1-3 on the plug of the power
cord. Do not use the ground pin on the plug as a
measuring point. Note: On the 400V CE power supply,
there is no link box.
Check power cord and
power switch S1. Replace
faulty component (Fig 4-4).
Meter
indicates an
open ?
No
Set power switch S1 to ON (1). Measure resistance
between the conductors on the plug of the power cord. Do
not use the ground pin on the plug as a measuring point.
The reading between TB1-1 & TB1-2 is the resistance
across the control transformer primary for the selected
input voltage.
Yes
Between
TB1-1 & TB1-2 does meter indicate
18 ohms (200V)
20 ohms (208V)
22 ohms (230V)
22 ohms (240V)
56 ohms (400V)
65 ohms (480V)
?
Meter indicates open between
TB1-1 & TB1-3, and open between
TB1-2 & TB1-3
?
To
page 3-12
L
To
page 3-12
R
To
page 3-13
Check # 2
No
Yes
No Yes
TB1
Link Box Behind Rear Panel
3-97
TB1-3
TB1-2
TB1-1
TB2
TB3
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