NF DP420LS Instruction Manual page 240

ID Message
50 Output Overcurrent [RMS]
51 Output Overcurrent [Peak]
52 Power Unit DCPS Error
53 Power Unit DCPS
Overvoltage
54 Power Unit DCPS
Undervoltage
55 Overheat
56 Sensing Voltage Error
57 Sync Frequency Error
58 Current Limiter [RMS]
59 Current Limiter [Peak]
60 Power Unit Internal Error
61
62
63
64
68 PU-ON Setting Updated
DP420LS/DP480LS
Table 9-2 Error Message List (Continued)
Protection
type
Output Off
Output Off
Output Off
Output Off
Output Off
Output Off
Output Off
Output Off
Output Off
Output Off
Output Off
Limiting
action
Limiting
action
Limiting
action
Limiting
action
Message
display only
9.1 Error Messages and Error Handling
Cause or Necessary action
The output current RMS value is excessive
on a module in the power unit. This may
occur when the output terminal is
short-circuited.
Also when the remote sensing function set
to FB, check the feedback cable connects
correctly. (See 8.2.2)
The output current peak value is excessive.
The DC power supply in the power unit is
abnormal, or see the notes in "9.1.3,
Operation procedure."
The voltage of the DC power supply in the
power unit is excessive. This may occur
when the power flows back from the load.
The voltage of the DC power supply in the
power unit is insufficient, or see the notes in
"9.1.3, Operation procedure." This may
occur when the overload output activated
the protection function on the DC power
supply.
The temperature in the power unit is
abnormally high. Check if the ambient
temperature is appropriate. Check the filters
for clogging. For filter cleaning, see 10.2.
The sensing voltage is abnormal. Make sure
the cable is properly connected to the
sensing input terminal.
The frequency went out of the
synchronizable range, and thus the output
turned off.
The RMS current limiter was activated, and
thus the output was turned off according to
the setting.
The peak current limiter was activated, and
thus the output was turned off according to
the setting.
This is a power unit internal error. If it
occurs repeatedly, contact the seller (NF
Corporation or our agent) from whom you
purchased the product.
The active wattage limiter is activated.
The RMS current limiter is activated.
The peak current limiter is activated.
The internal operation differs from that for
ID 64.
The peak current limiter is activated.
The internal operation differs from that for
ID 63.
The power unit energization setting was
updated.
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