Mitsubishi MELDAS TRS50 Manual page 34

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6 Power unit alarm (PUAL)
7 Fin overheating (F.OH)
8 Motor overload (M.OH)
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1) LVAL
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(2) When there is nothing unusual with the voltage, the trouble
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2) OCP
(1) Check using a multimeter whether the power transistors have
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Power unit alarm display.
Refer to the section on INSPECTION OF POWER UNIT for further
details of the alarm.
Protection is provided when an overcurrent flows to the
circuitry and the fin mounted on transistors overheats.
Protection is provided when motor is overloaded and it
overheats.
REMEDIES FOR ALARMS
Measure the AC 100V voltage of the amplifier terminal block
using a multimeter or synchroscope.
may be an instantaneous power failure.
and AC 200V wiring connections.
Disconnect the wires and measure across the
been damaged.
collector and emitter of the transistors.
wrong, the resistance is at infinity.
Rating:
Check the AC 100V
When nothing is