SAF BUFFALO 400 DC, Инструкция по технике безопасности, эксплуатации и обслуживанию

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D - MAINTENANCE
MAINTENANCE
D
- 28
BUFFALO
400
DC
TROUBLESHOOTING
Maintenance work on electrical equipment must be entrusted to persons qualified to do such work (see
chapter SAFETY INSTRUCTIONS).
CAUSES SOLUTIONS
NO WELDING CURRENT / SWITCH I1 ON / WHITE LAMP OFF
❐
Faulty lamp
❐ Mains
☞
Test for 220V at the lamp terminals
if OK ➮ change L1
☞ Check the voltage and the number of phases
NO WELDING CURRENT / SWITCH I1 ON / YELLOW LAMP ON
❐
Set on overload
❐
Thermal safety device (STH1)
❐ 1 supply phase is missing
❐
IC trigger
☞ Allow to cool for several minutes until the lamp goes off.
☞ Shunt wires 200 and 214 ⇒ if the lamp goes off change STH1
☞ Check your supply connection
☞ if all this tests above OK ⇒ change IC
NO LOAD VOLTAGE = 0V / STRIKING IMPOSSIBLE
❐
Transformer (TP1)
❐ Rectifier bridge
❐ IC trigger
☞ Check U ≈ 50V between 11-21 / 21-31 / 31-11
☞ Test rectifier bridge
☞ Check U ≈ 50V between 61-62/62-63/61-63 and 18V ≈ between 60-64 et 60-
65. If OK
⇒
change IC
NO LOAD VOLTAGE = 0V / STRIKING POSSIBLE / NO ADJUSTMENT OF CURRENT
❐ IC trigger
☞ If the set has a remote control, disconnect it
⇒
check for
adjustment, if not replace IC
ARC FAILURE DURING WELDING
❐
Current too low ☞ Check the recommended currents
FAN DOES NOT OPERATE
❐
Fuse F1
❐ Motor
❐
Relay card
❐ Thermal safety (STH2)
☞ Change the fuse if faulty
☞ Shunt wires 101 and U2 (single voltage) / 101 and U3 (multi-
voltage). If the motor does not operate
⇒ check the condenser,
if OK replace the motor
Check 18V ≈ between 60A and 65A. If OK change IC
☞ Shunt 68 and 69. If motor operates, change STH2.
NO REMOTE CONTROL ADJUSTMENT POSSIBLE
Disconnect the remote control. Check if it possible to adjust on the
set (P1)
Ö
If not : see preceding chapter
Ö If OK :
❐ Fuse F2 faulty
❐
Remote control
☞ Change it after checking the general condition of the remote
control (control cable, impacts on the case, etc.)
☞
Test it (broken wire, poor contact, etc.).
For all servicing operations in the power-source outside the points mentioned above :
CALL IN A SPECIALISED TECHNICIAN