ABB RPB 520, Instruction Manual

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When the switch is set to position
,
the indicating lamp (
+
on the front goes on
to indicate that the power source is ready for use.
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There are two indicating lamps (H11, H12) on the power source, se Figure 6.:
The green lamp (H11) for stand-by mode is always on when the power source is
connected to the mains and the main switch is in position I.
The yellow lamp (H12) for thermal cut-out goes on when the thermostat has tripped
as a result of overheating. The fans cool the power source and when the lamp goes
out the power source is ready for use again (resetting takes place automatically).
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RPB 320 has one fan and RPB 420/520 has two fans running simultaneously.
• The fans run for a while when the main switch is turned to position I.
• The fans go on when the power source after a period of welding is heated
and stops 1-10 minutes after the welding is terminated.
• At idle running the fans enter into function for about 60 sec. every 30 min.
H11
H12