TRANSTIG 200 AC/DC
SERVICE MANUAL
January 17, 2008
12-6
12.2.10
E85 "Pre-charge abnormality"
Cause
Due to malfunction inside the Welding Power
Source, primary capacitors are not charging
correctly.
Verification/Remedy
a. Verify the connection PCB2 (WK-5482) and the
rectified output voltage of the rectifier.
• Verify the connection between CN2 on PCB2 and
CN3 on PCB3.
• Confirm whether there is any breakage (blown,
burnt, cracked, etc.) of R4 and R5.
• Perform what is described in a section of “Veri-
fication of the Power Supply Voltage”. Refer to
section 12.5.2.
b. Verify the primary diode (D1).
• Verify D1. Refer to section 12.5.2.3.
• Replace D1. Refer to section 13.3.30.
c. Verify the primary IGBT (Q1-Q12).
• Verify IGBT. Refer to section 12.5.2.5.
• Replace IGBT. Refer to section 13.3.7, 13.3.8.
d. Replace PCB2 (WK-5482) and PCB4 (WK-4819).
• Replace PCB2 and PCB4, when abnormalities
occur, even if you carry out the above-mentioned
verifications. Refer to section 13.3.2, 13.3.4.
12.2.11 E94 "Thermistor malfunction"
Cause
Thermistors for detecting temperature of in-
ternal components have malfunctioned.
Verification/Remedy
a. Confirm a secure connection of the harness wired
between CN8-9 on PCB6 (WK-5549) and Ther-
mistors (TH1, TH2).
• Re-install the harness with a secure connection.
• Contact the manufacturer if you find any bro-
ken connectors or a damaged wiring harness.
b. Replace thermistors (TH1, TH2).
• Refer to section 13.3.22, 13.3.23.
c. Replace PCB6 (WK-5549).
• Refer to section 13.3.5.
12.2.12 E99 "Initial Power Receiving"
Cause
Occurs when the initial AC power received sig-
nal has not reached the CPU. This error oc-
curs normally during the power "OFF" sequence
of the unit.
Verification/Remedy
a. Confirm a secure connection of the harness wired
between CN1 on PCB17 (WK-4917) and CN2 on
PCB3 (WK-5548).
• Re-install the harness with a secure connection.
• Contact the manufacturer if you find any bro-
ken connectors or a damaged wiring harness.
b. Verify PCB4 (WK-4819) and replace it if neces-
sary.
• Confirm a secure connection of all harnesses
wired to PCB3 and PCB4.
• Replace PCB4. Refer to section 13.3.4.
c. Replace PCB6 (WK-5549).
• Refer to section 13.3.5.
12.03 Verification and Remedy to
Failures without Indication
Codes
Refer to Note on Section 12.02.
12.3.1 "Cooling Fan (FAN1) Failure" (Fan is
not rotating.)
Cause
Occurs when the cooling fan (FAN1) is defec-
tive, damaged or the driving voltage is incor-
rect.
Verification/Remedy
a. Verify the cooling fan (FAN1).
• Inspect the condition of the fan blades and all
peripheral parts. Clean the fan blades and all
peripheral parts if covered with dust. Cleaning
and removing dust from the fan blades once
every 6 months in a normal environment is rec-
ommended. Extremely dusty environments will
require more frequent cleaning.
• Verify that there are no wiring harnesses en-
tangled inside the fan, confirm that the har-
nesses do not have any brakes in the wire or
damaged connectors.
• Replace wiring harnesses if you find any bro-
ken connectors or damaged wiring harnesses.
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