Tweco 1000 Merlin(Dec2004) - Manual (Page 51)

Manual 0-2708 5-5 SERVICE
B. AC Power Indicator ON; TEMP Indicator ON
1. Airflow obstructed
a. Check for obstructed air flow and correct condition.
2. Fan(s) 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 beyond duty
cycle limit.
4. Input line voltage is low
a. Check and connect to proper input power line
5. 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 activated
1. RUN/SET switch in SET position
a. Move switch to RUN position.
2. Start signal activated during 8 second power on time
a. Remove Start signal and wait until AC Indicator
stops flashing before sending Start signal
3. Gas pressure too high or too low
a. Set pressure per Cut Speed Charts in appropriate
Torch Manual.
4. Faulty torch parts
a. Inspect torch parts and replace if necessary (refer
to Torch Instruction Manual supplied with torch).
5. 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. Faulty components in unit
a. Return for repair or have qualified technician
repair per Service Manual.
E. Limited or Low cutting output with no control
1. Incorrect setting of CURRENT control
a. Check and adjusted to proper setting.
2. Poor input or output connections
a. Check all input and output connections.
3. Low plasma gas flow
a. Check for leaks or restriction in gas supply line
b. Replace all Torch Consumables
4. Faulty components in unit
a. Return for repair or have qualified technician repair
per Service Manual.
F. Erratic or improper cutting output
1. Poor input or output connections
a. Check all input and output connections.
2. Faulty torch parts
a. Inspect torch parts and replace if necessary (refer
to Torch Instruction Manual supplied with torch).
G. AC Power Indicator ON; Cutting output available; Fan(s)
not operating
1. Fan blades blocked
a. Check and clear blades.
2. Faulty components in unit
a. Return for repair or have qualified technician repair
per Service Manual.
H. AC POWER Indicator ON; Fans operate; No gas flow
1. Gas not connected or pressure too low
a. Check source for at least 80 psi (5.5 bar).
b. Verify setting of Secondary Gas Mode switch.
2. Low flow in gas supply path
a. Check for leak or restriction in gas supply lines,
replace as necessary
b. Check for damaged torch parts, replace as nec-
essary
3. Faulty components in unit
a. Return for repair or have qualified technician
repair per Service Manual.
I. Torch cuts but not adequately
1. Current set too low
a. Increase current setting.
2. Torch is being moved too fast across workpiece
a. Reduce cutting speed (refer to Instruction Manual
supplied with torch.