Landis+Gyr ZFQ202, User Manual

Page: 83 / 88

H 71 0200 0215 f en - ZMQ202 / ZFQ202 - User Manual Gyr
Maintenance 83/88
Changing the Communication Unit in f9 Meters
1. De-install the meter (
see page 52
).
2. Switch off the voltage. The phase voltage display ( L1 L2 L3)
disappears.
3. Switch off tariff inputs and synchronisation input. Check if the
corresponding indicators disappear from the display.
4. Switch off the voltage for the additional power supply.
5. Withdraw the meter from the rack.
6. Remove the seals at the back of the housing and remove the housing.
7. Remove the communication unit (or dummy).
8. Carefully insert the new communication unit ensuring the plug and
socket are properly engaged.
9. Connect the connecting wires to the terminals of the communication
unit.
10. Carry out functional tests as described in the relevant communication
unit manual to ensure it is functioning correctly.
11. Replace the housing and re-seal.
12. Install the meter ( see page 47 ).