Tweco 42 CutMaster Service Manual - Manual (Page 37)

TROUBLESHOOTING CUTMASTER 42
Manual 0-5171 6-1 Troubleshooting
6.01 Basic Troubleshooting-Power Source Faults
!
WARNING
There are extremely dangerous voltage and power levels present inside this unit. Do not attempt to diagnose
or repair it unless you are an accredited service provider and you have had training in power electronics
measurement and troubleshooting techniques.
Common Faults symptom LED Indicators
A. AC indicator
OFF
1. Main input power cord does not connect to power distribution net.
a. Connect the power cord.
2. Power ON/OFF switch in OFF (down) position.
a. Turn switch to ON (up) position.
3. Actual input voltage does not correspond to voltage of unit.
a. Verify that the input line voltage is correct.
4. Faulty components in unit
a. Return for repair or have qualified technician repair per service manual.
B. AC indicator blinking
1. Indicator blinking (1 sec ON/1 Sec OFF, Gas may also pulse 3 times).
a. Check for missing torch parts or not properly installed. Turn ON/OFF switch to OFF position and restart
the machine by turning the power switch to ON.
2. Indicator blinking (1 sec ON/3 Sec OFF).
a. Check for worn or sticking torch parts. Replace if necessary.
3. Indicator blinking (3 sec ON/3 Sec OFF).
a. Torch switch was depressed before machine was completely powered up. Turn ON/OFF switch to OFF
position and the restart the machine by turning the power switch to ON.
C. Air indicator OFF
1. Gas pressure too low. Check supply pressure.
D. TEMP indicator ON, (AC indicator ON)
1. Unit air flow obstructed.
a. Check for blocked air flow around the unit and correct condition.
2. Fan blocked.
a. Check for blocked status and correct condition.
SECTION 6:
TROUBLESHOOTING