Integration mc defective performance – Yaskawa YASNAC PC NC Maintenance Manual User Manual
Page 60
Chapter 4: Troubleshooting
PC NC Maintenance Manual
4-39
Cause and measures
23:Integration MC defective performance
Error Contents
The magnetic contactor does not work.
Detection Methods
If answer does not return after 500ms after MC is turning ON, the gate
is blocked (regeneration operation stop), and the alarm is processed.
Cause and measures
43, 44:Heat sink overheating 1 and 2
Error Contents
43: Heat sink temperature exceeded the upper limit. (minor fault)
44: Teosinte temperature exceeded the upper limit and has passed for
one minute or more.
Detection Methods
The voltage for the heat sink temperature detection is consistent with
the thermistor signal (2CN-10) for the heat sink temperature detection.
If the temperature of the heat sink exceeds 80ºC, the minor fault display
is performed due to heat sink overheating 1(43). The drive continues.
The minor fault display is released if the temperature of the heat sink is
79ºC or less.
If the state of heat sink overheating 1(43) continues for one minute, the
gate is blocked (regeneration operation stop), and the alarm is pro-
cessed due to heat sink overheating 2(44).
Cause Measures
MC fault
Confirm that the MC operates within a few seconds after
turning ON.
Exchange MC.
Charging current control resistance
disconnection
Confirm that there is DC generative voltage rising.
Exchange resistance.
Cause Measures
MC fault (coil disconnection/defective
contact)
Confirm that the MC operates within a few seconds after the
second attempt of turning ON.
Exchange MC.
MC answer signal disconnection
Check the connection of the signal conductor.