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1. Cause (Italic Type)
a. Check/Remedy (Text Type)
Locate your symptom, check the causes (easiest listed
first) then remedies. Repair as needed being sure to
verify that unit is fully operational after any repairs.
A. AC Power indicator OFF
1. Switch at customer's main power panel in OFF posi-
tion.
a. Close main power panel switch
2. Input power not properly connected to customer's main
power panel
a. Check that input power is present and unit is
properly connected (refer to Section 3.05, In-
put Power Connections)
3. Actual input voltage does not correspond to voltage
phase selection inside unit
a. Check actual line voltage phase vs. voltage
phase selection (inside of unit)
4. Customer's main power line fuse(s) blown
a. Check main power panel fuse(s) and replace
as required.
5. Unit internal fuse blown or loose
a. If blown, double check input voltage vs. volt-
age selection (inside of unit) and replace fuse
per Section 5.05-B. If fuse blows again, return
unit to an authorized service center.
6. Faulty components in unit
a. Return for repair or have qualified technician
repair per Service Manual.
B. AC Power indicator ON; TEMP indicator ON
1. Airflow obstructed
a. Check for obstructed air flow and correct con-
dition.
2. Fan blocked
a. Check and correct condition
3. Unit is overheated
a. Allow unit to cool down for about 5 minutes.
Make sure the unit has not been operated be-
yond duty cycle limit.
4. Input line voltage is below 75% of rated level
a. Check and connect to proper input power line
Manual 0-2700
5. Input voltage of 460 V AC applied to 208/230/240 V AC
or 380/415 V AC Models
a. Check input line voltage and correct as re-
quired.
6. Faulty components in unit
a. Return for repair or have qualified technician
repair per Service Manual.
C. Torch will not pilot when torch switch is acti-
vated
1. Torch switch activated during 2 second pre-flow
a. Release switch and wait at least 2 seconds be-
fore activating switch again
2. Faulty torch parts
a. Inspect torch parts and replace if necessary (re-
fer to Instruction Manual supplied with torch).
3. Gas pressure too high or too low
a. Set pressure to 60 psi (4.1 bar or 410 kPa).
4. Faulty components in unit
a. Return for repair or have qualified technician
repair per Service Manual.
D. AC Power indicator ON; Fans operating; No
cutting output
1. Torch not properly connected to power supply
a. Check that torch leads are properly attached to
power supply
2. Shield cup not properly installed on torch
a. Check that shield cup is fully seated against
torch head (do not overtighten if screwed on)
3. Faulty components in unit
a. Return for repair or have qualified technician
repair per Service Manual.
E. Low cutting output with no control
1. Incorrect setting of CURRENT control
a. Check and adjusted to proper setting.
2. Faulty components in unit
a. Return for repair or have qualified technician
repair per Service Manual.
F. Limited output with no control
1. Poor input or output connections
a. Check all input and output connections.
25
SERVICE
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