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10.5.3
Dismantling the electronic module
Dismantling, module 1.5 ... 7.5 kW
1
Fig. 52: Replacing the electronic module
Dismantling, module 11 ... 22 kW
58
Maintenance/repair
DANGER
Risk of fatal injury due to electrical current!
Improper conduct when carrying out electrical work can lead to death due to electric
shock!
• Any work on electrical devices may only be carried out by a qualified electrician.
• Before carrying out any work, disconnect the unit from the power supply and
secure it against accidental switch-on and wait 5 minutes.
• Check whether all connections (including potential-free contacts) are voltage-
free.
• Never poke around in the openings on the electronic module or insert anything
into them.
• Any damage to the pump connection cable should only ever be rectified by a
qualified electrician.
• Observe the installation and operating instructions for the pump, motor and
other accessories.
• Reinstall any uninstalled safety devices, such as module covers, once the work is
complete.
DANGER
Risk of fatal injury due to contact voltage! Even when it is disconnected,
high contact voltages can still occur in the electronic module due to non-
discharged capacitors.
Touching live parts will result in serious injuries or death!
• Before working on the pump, disconnect the power supply and wait for
5 minutes.
• Check whether all connections (including potential-free contacts) are voltage-
free.
• Never poke around in the openings of the electronic module or insert anything
into them!
1. Disconnect the system from the power supply and secure it against being switched
on again without authorisation.
2. Close the shut-off devices upstream and downstream of the pump.
3. Ensure system is voltage-free.
4. Earth the work area and short-circuit.
5. Disconnect the mains cable. If present, remove the cable for the differential pres-
sure sensor.
1
6. If required, remove additional cables (sensors, signals etc.).
7. Remove the screws and tooth lock washers (Item 1) and pull the electronic module
vertically upwards.
CAUTION
Risk of material damage if the electronic module is not installed!
Normal operation of the pump is only permitted with the electronic module in-
stalled!
The pump must not be connected or operated without the electronic module being
installed!
WILO SE 2020-10
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