Hitachi SH1 Series Basic Manual page 104

Chapter 5
Code Details
Waiting in undervoltage status:
If the input voltage falls, the inverter
will shut off its output, display the
code shown on the left, and wait for
the recovery of the input voltage.
The inverter will display the same
error code also during an
instantaneous power failure.
Communication error:
If a problem occurs in the
communication between the digital
operator and inverter, the inverter
will display the code shown on the
left.
Waiting for retry:
When the retry after instantaneous
power failure or tripping has been
enabled, the inverter displays the
code shown on the left while
awaiting retry after an instantaneous
power failure or tripping.
Power-off：
The inverter displays the code shown
on the left when the inverter power
is turned off.
Restricted operation command:
When an operation direction has
been restricted by the setting of
"AA114", the inverter will display the
error code shown on the left if the
operation command specifying the
restricted operation direction is input.
Resetting:
The inverter displays the code
shown on the left(the display turns
around)while resetting,
because the intelligent input
terminals RS and CM1 are
short-circuited.
Empty trip history:
If the inverter has not tripped
before, the inverter displays
Corrective actions
・Check whether the power supply voltage has fallen
(Recover the power supply.)
・Check the MCB and magnetic contactors for poor contacts
(Replace the MCB and magnetic contactors.)
・Check whether the voltage across the P and N terminals is
normal (Check the voltage across the P and N terminals.)
・Check whether the relay plug is fitted correctly
(Check the relay plug for connection.)
・Check whether the digital operator is connected correctly
(Check the digital operator for connection.)
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・Check whether the intelligent input terminals RS and CM1 are
short-circuited or not?
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5-3
Troubleshooting
Related
parameter
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[bb-10]
[bb-20]
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[AA114]
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[dE-11]