Yaskawa PC NC - Manual (Page 167)

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YASNAC PCNC Operating Manual Chapter 4: Maintenance
4.1.5 Troubleshooting (1)
(1) Alarm No.: 1099 (High Temperature)
Table 4.1.5.1: Countermeasures - Alarm N.: 1099 (High Temperature)
CAUSE CHECK ITEM COUNTERMEASURES
Ambient temperature of
the NC rack exceeded the
specified value* due to
the failure of cooling fan.
*: 70ºC ± 3ºC when
measured above CPS-18.
• Open the NC unit door to check
if the cooling fan is operating
correctly.
• Make sure that air is blowing out
through the ventilation port of the
cooling duct.
• Make sure that the ventilation
port of the cooling duct is not
blocked.
• If the fan is faulty, it is
necessary to change it.
Contact your Yaskawa
representative.
• If the cooling duct is blocked
remove interfering object
and start the cooling fan.
Internal temperature of the
power supply unit is high.
Allow the power supply unit to cool
by turning OFF the power with PCNC
unit door opened. If the alarm occurs
even after the power supply unit has
been cooled for 30 minutes, the
power supply unit will be faulty.
It is necessary to change the power
supply unit. Contact your Yaskawa
representative.
Ambient temperature of
the l NC unit is high.*
*:Allowable temperature
range for operation
is 0 to 40ºC.
• Measure ambient temperature.
• If the NC unit is subject to direct
sunlight, the NC unit temperature
will exceed the allowable limit.
• This is not the failure of the NC
unit. Remove the cause.