TECHNICAL
BULLETIN
Date: 03/25/2010
Product: All Cutmaster TRUE (except CM 42, 39 and CM 10) By: Jorge Santana
Subject: Cold weather performance
Summary: Erratic Pilot arc under 0
O
C (32
O
F)
THERMAL DYNAMICS TECHNICAL SUPPORT
Phone: 1-800-752-7622
Fax: 1-603-298-7402
tdc-tech@thermadyne.com
www.thermadyne.com
Form 0024
82 Benning Street
West Lebanon, NH 03784
1-603-298-5711
Fax: 1-800-221-4401
“Exceeding Customer Expectations Through Performance Excellence"
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
0
O
C (32
O
F)”.
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
O
– 50
O
C (14
O
– 122
O
F).
“ This enhancement is being addressed in the Main PCB revision change to AN02 “
Please contact
Thermadyne Technical Support at 1-800-752-7622 to request a replacement board and an RGA # in
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
O
C (104
O
F), which is standard in the Welding Industry.
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
inside the unit (Torch, regulator, gas
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.
-
1
ESAB 39 and CM 10) Troubleshooting instruction
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