
B–70115EN/03
6. TROUBLESHOOTING
168
No. Cause of trouble Solution
1 Gas leakage be-
tween gas cylinder
and oscillator
Ascertain the following.
(1) Anomalous mounting of regulator.
(2) Anomalous connection between tube and reg-
ulator.
(3) Anomalous connection of gas inlet fitting of
oscillator.
2 Anomalous adjust-
ment of exhaust
controller
Adjust in accordance with the description of Chap-
ter 9.
3 Gas leakage inside
gas controller
Check the presence of leakage of tube to the gas
flow rate controlling valve.
If a fault is detected in the inverter, an alarm indicator lamp on the inverter
will light.
(1)Inverter (A90L–0001–0382/C: Model HFC–VAH2)
Fig. 6.4.10(a) shows the locations of the alarm indicator lamps.
Indicator lamps
Indicator lamp layout
f UV : Power supply voltage drop,
momentary loss
f OC : Load short–circuit,
momentary overcurrent
f OV : Overvoltage
f OV : Fin overheated
Fig. 6.4.10 Inverter alarm indicator lamps
UV : Power supply voltage drop
No. Cause of trouble Solution
1 Drop in supply voltage.
(The supply voltage failed momen-
tarily.)
Check the supply voltage.
Turn off the power to the oscillator,
then perform a reset.
2 Chattering occurred in a contactor
connected to the inverter.
Check the magnetic contactor.
Replace the magnetic contactor if
faulty.
6.4.9
Excessive Laser Gas
Consumption
6.4.10
High–frequency
Inverter Alarm Display