Pe-Protection / Gas Pressure Switch - LORCH S-Pulse Service Manual

Troubleshooting
9.4

PE-protection / gas pressure switch

All machines of the S- and P-Relaunch series have a build-in PE protection by standard. As soon as a cur-
rent >15A is flowing via the PE (protective earth) wire of the mains cable, the Reed-contact opens and the
machine stops with the code E04-01 (Stop/peripherals error).
Gas monitoring (optional)
An additional optional feature is a gas monitoring function using a gas pressure switch. The opening con-
tact of the pressure switch is directly connected to the MAPRO05 board.
As soon as the gas pressure switch opens (gas bottle is empty), the machine would stop with E04-02
(Stop/peripherals error). The message is only shown if the switch opens during the time the gas valve is
active (during welding, gas post flow time or gas test).
Schematic
MAPRO
Master
Both monitoring functions (PE and gas) are self-activating functions, that means as soon as the Master
detects a closed contact at the input X26-6 or X26-5, the respective monitoring function becomes perma-
nently active. From that time on the Master is expecting always a closed contact.
The monitoring functions can be deactivated using the Service codes 663 and 665 (see also "9.14 Service
Codes" on page 63).
02.20
X26-6
X26-3
X26-5
P
gas
X26-2
(Option)
909.2710.1-06
L
N
PE
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