E03 "Primary Over-Current Failure; E94 "Thermistor Malfunction; E99 "Initial Power Receiving - Thermal Arc ARCMASTER 200 TS Service Manual

c) Verify the operation of the cooling fan, FAN1,
and replace it if necessary.
 Verify the condition of FAN1. Verify that there
are no broken or cracked fan blades and that
FAN1 is not producing any abnormal sounds.
 If broken or cracked FAN1 blades or abnor-
mal sounds are emanating from FAN1,
replace FAN1.
 Verify the operation of the cooling fan and
replace it if the condition of FAN1 is inactive.
Follow the instruction in section.
 Refer to section 11.5-3 for additional FAN1
tests.
 Refer to section 12.3-11 for the replacement
of FAN1.
d) Replace PCB4 (WK-5449) and PCB5 (WK-
5448).
 Refer to section 12.3-4, 3-5 for the replace-
ment of PCB4 and PCB5.
2.3 E03 "Primary Over-Current Fail-
ure"
Cause
Occurs when excessive current is detected flow-
ing into the primary side of the main transformer.
Verification/Remedy
a) Confirm the operation of the machine within
the rated specification.
 Refer to the specification data sheet in sec-
tion 3.9.
b) Verify the secondary diode (D2 and D3).
 Refer to section 11.5-6 for the test of D2 and
D3.
 Refer to section 12.3-8 for the replacement of
D2 and D3.
c) Verify the H.F. unit (HF. UNIT1).
 Refer to section 12.3-12 for the replacement
of HF.UNIT 1.
d) Replace the Hall CT (CT1).
NOTE
Pay special attention to installed direction of CT1.
The Hall CT will not function properly if installed in
the incorrect direction.
 Refer to section 12.3-10 for the replacement of
CT1.
11
200TS

2.4 E94 "Thermistor malfunction"

Cause
Thermistors for detecting temperature of internal
components have malfunctioned.
Verification/Remedy
a) Verify a secure connection of the harness
wired between CN5-6 on PCB1 (WK-5713)
and Thermistors (TH1, TH2).
 Re-install the harness with a secure connec-
tion.
 Contact the manufacturer if you find any bro-
ken connectors or damaged wiring harness.
b) Replace thermistors (TH1, TH2).
 Refer to section 12.3-12, 3-13.
c) Replace PCB5 (WK-5448).
 Refer to section 12.3-5.

2.5 E99 "Initial Power Receiving"

Cause
Occurs when the initial AC power received signal
has not reached the CPU. This error occurs nor-
mally during the power "OFF" sequence of the
unit.
Verification/Remedy
a) Verify the connection between "+" terminal of
Primary diode (D1) and PCB1 (WK-5713).
 Verify that there is no omission of a loosening
connected wire between the PCB1 and D1.
 Contact the manufacturer if you find any bro-
ken connectors or damaged wire.
b) Verify that there is no omission of a loosening
screws and connected harness with PCB1
(WK-5713).
 Re-install the harness with a secure connec-
tion.
 Contact the manufacturer if you find any bro-
ken connectors or damaged wiring harness.
 Replace PCB1. Refer to section 12.3-1.
c) Replace PCB4 (WK-5449) and PCB5 (WK-
5448).
 Refer to section 12.3-4, 3-5 for the replace-
ment of PCB4 and PCB5.
11 – 4
ADVANCED TROUBLESHOOTING