
3. TROUBLESHOOTING
AND ACTION TROUBLESHOOTING B-65165E/02
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3.1.2.8 Alarm code 26
(1) Meaning
The frequency of the main circuit input power supply is abnormal.
(2) Cause and troubleshooting
(a) Input power supply frequency error
→ Check the input power supply specification (50/60 Hz
±1 Hz).
3.1.2.9 Alarm code 36
(1) Meaning
The input power supply of the main circuit has an imbalance.
(2) Cause and troubleshooting
(a) The input supply voltage has an imbalance of 5% or more.
→ Check the input power supply specification.
3.1.2.10 Alarm code 46
(1) Meaning
When the magnetic contactor is turned on, the phase sequence of
the power supply cannot be determined.
(2) Cause and troubleshooting
(a) Input power supply error
→ Check the input power supply specification.
3.1.2.11 Alarm code 07
(1) Meaning
In the main circuit, the DC voltage at the DC link is abnormally
high.
(2) Cause and troubleshooting
(a) Excessive regenerated power
The PSMV does not have a sufficient capacity.
→ Check the specification of the PSMV.
(b) The output impedance of the AC power source is too high.
→ Check the power source output impedance.
(Normal if the voltage variation at maximum output time is
within 7%)
(c) Regeneration circuit failure
→ Replace the unit.