
3. TROUBLESHOOTING
AND ACTION TROUBLESHOOTING B-65165E/02
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3.1.2.1 Alarm code 01
(1) Meaning
Overcurrent flowed into the DC link of the main circuit.
(2) Cause and troubleshooting
(a) Thyristor or IGBT failure
→ Replace the thyristor or IGBT.
(b) DC link short-circuit
→ Check the connection.
(c) The specification of the AC reactor does not match the
PSMV in use.
→ Check the PSMV and the specification of the AC
reactor.
3.1.2.2 Alarm code 02
(1) Meaning
A cooling fan for the control circuit has stopped.
(2) Cause and troubleshooting
(a) Cooling fan for the control circuit broken
Check whether the cooling fan for the control circuit rotates
normally.
→ Replace it.
3.1.2.3 Alarm code 03
(1) Meaning
The temperature of the main circuit heat sink has risen
abnormally.
(2) Cause and troubleshooting
(a) Cooling fan for the main circuit broken
Check whether the cooling fan for the main circuit rotates
normally.
→ Replace it.
(b) Dust accumulation
→ Clean the cooling system with a vacuum cleaner or the
factory air blower.
(c) Overload
→ Examine the operating conditions.