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Check the Following Design Details
Interlock
(1) In addition to paying attention to miswiring,
check the commercial power source selector
circuit shown In the figure on the right. If unde-
sirable application of power voltage occurs
aged. Ensure electrical and mechanical inter-
lock of MC 1 and 2.
(2) At
power failure, retaining the start signal (start switch) ON automatically starts the inverter when
Power
supply
W
through such a circuit, the inverter will be dam-
Undesirable power
(3)
Input signals to the control circuit are at low level. If these signals are input through contacts, use
two units of contact for at low level signals or use twin contacts in order to prevent defective con-
tacting.
(4) Do
not apply a voltage
to
contact input terminals (e.g.,
STF) of
the control circuit.
(5) Do not apply voltage directly to the alarm output terminals (B,C) without a relay coil or lamp.
(Continued on next page)
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