Manual no. WDT90100 Page 28
CoolTig - 220
and Imax for
max current
7 No OCV Problem main circuit Check control
PCB, Power
PCB and
IGBT module
8 No gas
flow out
after
pull the
gun
trigger
Contactor
closed
Input voltage is too low Use rated input
voltage
Gas pressure not enough Check gas
pressure
Poor gas hose connection Check gas
connection
Solenoid valve failure Check and
replace
Solenoid valve
Gas passage problem Check and
repair the gas
passage
Torch gas hose problem Check and
repair torch
cable
Contactor Gun trigger failure Check gun
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