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Maintenance
9.1 Safety instructions for maintenance
Danger due to high auxiliary voltage
Manual operation is dangerous when an auxiliary voltage is present. Death and serious injury
can result.
• Before performing maintenance work, switch off the motor circuit breaker of the
disconnector.
• Observe the information in the documentation provided for the disconnector.
Danger due to high voltages of the snubber circuit capacitors
The snubber circuit capacitors are not equipped with discharge resistors. If the connection to the
capacitor is interrupted, high voltages of up to several 1000 V can result, and cause an electric
shock.
This can result in death, severe injuries and significant material damage.
• You must always handle the capacitors as if they are charged.
• Discharge the snubber circuit capacitors.
• Short-circuit the snubber circuit capacitors before commencing any work.
Danger to life as a result of a hazardous voltage at the anti-condensation heating
The anti-condensation heating system is used when the device is switched off during non-
operational periods or when maintenance work is being carried out. For this reason, the heating
is supplied with voltage from a separate line supply. When the power supply voltage for the anti-
condensation heating is connected – also for an EMERGENCY OFF or when the main switch is
open – a hazardous voltage is still present. This voltage can cause serious injury.
• Carefully comply with the 5 safety rules.
Risk of burns due to hot anti-condensation heating surface
When the temperature control limit value is reached the anti-condensation heating is switched
on. Once activated, the anti-condensation heating can generate a great deal of heat. Contact
can result in serious injury, such as skin burns.
• Ensure that the anti-condensation heating cannot be touched.
• Ensure that the anti-condensation heating is switched off before carrying out any repair or
maintenance work.
Injury when falling
There is a risk of falling if you step on the cover of the anti-condensation heating. This can result
in injury.
• Do not use the anti-condensation heating system to help you get to the top of the cabinet.
114
3rd Party LCI Control Upgrade
Operating Instructions, 02/2022, A5E31872818
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