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Spare parts/accessories
11.1 Installing and removing the backup battery
Risk of explosion and release of harmful substances
Improper handling of lithium batteries can cause them to explode.
Explosion of the batteries and the released toxic substances can cause severe physical injury.
Worn batteries jeopardize the function of the device.
Note the following when handling lithium batteries:
● Replace used batteries in good time; see the section "Replacing the backup battery" in the
● Replace the lithium battery only with an identical battery or types recommended by the
● Do not throw lithium batteries into fire, do not solder on the cell body, do not recharge, do
Removal
NOTICE
Date and time setting are lost
The time setting is cleared if it takes more than 30 seconds to replace the battery. The device
time is no longer synchronized. Timer-controlled programs will no longer run or run at the
incorrect time. This may damage the plant.
Set the device time again.
1. Remove the screws shown in the figure.
2. Pull the cover plate to the left and lift it up.
3. Carefully detach the backup battery plug.
4. Remove the black battery holder from the cable from the device housing.
5. Remove the battery from the battery holder.
92
WARNING
operating instructions.
manufacturer (order no.: A5E34734290).
not open, do not short-circuit, do not reverse the polarity, do not heat above 100 °C and
protect from direct sunlight, moisture and condensation.
Equipment Manual, 09/2019, A5E47437728B AB
MCU 1720
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