Thermal Dynamics CUTMASTER 60i Service Manual page 67

d. A faulty voltage measurement circuit on the Inverter board might cause the unit to not recognize that
there was voltage on the electrode. You can remove the ribbon cable from the Control & Display board
and with the unit powered up (the display will not be on). Measure between common at pin 50 of the
ribbon cable connector (or the work lead) and pin 13. Also from common to pin 49. Both should be zero,
less than 0.01V. If higher the Inverter board may be faulty.
e. If step d. was OK now remove the red pilot wire for the ATC to Inverter board stud marked TIP. Now
measure common to ribbon cable pin 13. Now it should read 0.05V. If not, if still zero or if much higher
replace the Inverter board.
f. Another possibility is the Control & Display board but the only way to tell is replace it.
8. E014, Trigger Fault
During power up the trigger or Start signal should not be on as it could cause an unexpected pilot and perhaps
transfer. Pulling the trigger or applying Start any time before start up purge will also set the E014 fault. In that
case the system ignores the signal and sets the fault to show what the problem is. Releasing the trigger or re-
moving Start resets the fault and you can use the torch. There is an LED (D643) labeled START that is on if the
Start/Trigger input is active.
a. If the START LED was not on during or after power up and E014 is showing, replace the Control & Dis-
play board.
b. If the START LED is on and trigger is not pulled or CNC Start is not on, disconnect the torch ATC. If the
START LED goes out, problem was in the torch. You can further confirm that by measuring resistance
between pins 3 & 4 of the torch lead ATC. They should be open, if not, problem is in the torch. If not that,
check for a short between pin 3 and either the pilot or negative.
c. If using automation torch (SL100SV) with rear panel CNC cable remove the cable. If E014 goes away the
problem was in the CNC or the cable.
d. Remove J607 from the Inverter board. If START LED remains on and unit has the Automation Interface
board remove J609. If START LED is now off, the problem is in either the J609 harness or the Interface
board. Check the harness for correct wiring. If OK replace the Automation Interface board.
e. If START LED is still on with J607 and J609 (if equipped) remove the ribbon cable from the inverter board
at J602. If START LED is still on, replace the Inverter board.
f. If START LED went out when the ribbon cable was removed reinstall it at J602 and disconnect it from
J103 on the Control & Display board. If START LED remains on the ribbon cable is shorted. Otherwise
replace the Control & Display board.
9. E016, Pressure Fault.
Go to the section Power ON Tests, Startup #4 Gas Purge.
Manual 0-5475 SERVICE
CUTMASTER 60i
5-33