YASKAWA Motoman UP6 Instructions Manual page 367

8.8
Open Phase Check
Check Item
Lead Cable Check
Input Power Supply
Check
Circuit Breaker (QF1)
Check
Open Phase Check List
Confirm if the lead cable for the power supply is wired as shown
in the following. If the wiring is wrong or broken, repair it.
Check the open phase voltage of input power supply with an
electric tester.
(Normal value: 200-220V (+10%, -15%))
Turn on the control power supply and check the open phase volt-
age of "U,V,W" of the circuit breaker (QF1) with an electric tester.
If abnormal, replace the circuit breaker (QF1).
Input 200/220VAC
R S
T
CIRCUIT
BREAKER
(QF1)
CONTACTER
W
U V
(1KM)
R S
T
U V W
8-7
8.8 Open Phase Check
Contents
CONVERTER