Yaskawa Yasnac PC NC - Manual (Page 163)

YASNAC PC NC Operating Manual Chapter 4: Maintenance
4 - 5
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 speci-
fied value* due to the failure
of cooling fan.
*:
70ºC ± 3ºC when mea-
sured above CPS-18.
• Open the NC unit door to check if
the cooling fan is operating cor-
rectly.
• 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 PC
NC 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.