THERMAL DYNAMICS All Cutmaster True (Except CM 42, 39 and CM 10) Troubleshooting instruction

TECHNICAL

BULLETIN

Date: 03/25/2010
Product: All Cutmaster TRUE (except CM 42, 39 and CM 10) By: Jorge Santana
Subject: Cold weather performance

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Summary: Erratic Pilot arc under 0

Valued Thermadyne Service Provider,
It was brought to our attention that the Cutmaster True Series may experience “Erratic Pilot arc issues” when operating

in temperatures “Below

0OC (32OF)”.

C (32OF)

To address this concern Thermal Dynamics has made a modification in the main PCB that will allow the unit to expand
its Operating Temperature Range at the low end: -10

“ This enhancement is being addressed in the Main PCB revision change to AN02 “

Please contact
cases where the unit has the erratic arc symptom under cold conditions. We estimate that it will take a service person
approximately 1.5 – 2 hours to replace the main PCB

Important Notes:

9 The Duty Cycle for the units is still rated @ 40
9 Excessive moisture from the air compressor, can cause decreased transfer height or it may cause the pilot arc to

become weak or intermittent, or it may prevent the pilot arc from starting at all. This situation can negatively be
magnified if the moisture from the air compressor condensates and freezes

solenoid, hoses, etc).
Please verify that your air compressor delivers dry and clean air, check your operating manual for recommendations
on the use of external air filters.

Thermadyne Technical Support at 1-800-752-7622 to request a replacement board and an RGA # in

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– 50O C (14O– 122O F).

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C (104OF), which is standard in the Welding Industry.

inside the unit (Torch, regulator, gas

THERMAL DYNAMICS TECHNICAL SUPPORT

Phone: [phone]
Fax: [phone]
[e-mail]

www.thermadyne.com

Form 0024

82 Benning Street

West Lebanon, NH 03784

1-603-298-5711

Fax: [phone]

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