Hitachi RAS-50FH5 - Rotation Speed Does Not Increase

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POWER CIRCUIT
Phenomenon 1 <Rotation speed does not increase>
Is the DC voltage at least 350V?
Is the OVL lamp lit?
If the lamp is lit, it does not
indicate fault, but the unit
is overload status.
Recheck cord, etc. of the
system power module. If
they are disconnected,
connect them securely.
If abnormality continues,
replace the system
power module.
Overvoltage defect: system power
module faulty (15-times blinking)
Yes
No