Checking The Unit Leakage Current - Sirona ORTHOPHOS XG 3Dready Service Manual

7.15 Checking the unit leakage current

7 – 46
7.15

Checking the unit leakage current

DANGER
Perlious shock hazard!
It is essential to switch the unit off and to wait at least one more 1 minute
before beginning the check!
Prevent the device from unintentionally switching back on.
WARNING
Important information on building installation
The connection and disconnection of the unit (power cable) to/from the build-
ing installation must be performed by a qualified expert in compliance with the
national regulations. DIN VDE 0100-710 applies in Germany.
For measurements, Sirona recommends an automatic tester (example illus-
Automatic tester in accordance with IEC 62353
tration) which complies with standard IEC 62353. If you do not use an auto-
matic tester, please pay attention to the specifications in the standard IEC
62353.
1. Switch the line voltage off at the main switch of the building installation.
2. DANGER Note the electrical safety rules without fail.
Disconnect the power cable and the second protective ground wire from
the building installation.
3. Attach a connector compatible with the tester (see the user's manual for
the tester) to the unit's power cable.
4. Plug the connector of your power supply unit into the intended socket on
the tester in accordance with the user's manual for the tester.
5. Check whether the unit power switch is turned on.
CAUTION
According to Note 2 at Table 3 of standard IEC 62353:2014, the maximum de-
vice leakage current permitted by the manufacturer is 5 mA for permanently
connected units.
6. Perform the measurements according to the operating instructions of the
tester.
7. Document the measured value of the leakage current in the technical doc-
ument "Inspections, maintenance, and safety-related checks"
(REF 59 87 685), to identify changes from the original value.
– A maximum deviation of ±20% from the original value is permitted for
the measured leakage current.
8. If a deviation from the original value is >±20%:
Perform troubleshooting according to chapter "Unit leakage current too
high" (see service manual for the unit).
9. Reconnect the unit to the building installation (fixed connection) (see the
installation instructions for the unit).
Tab 7
59 38 399 D3352
D3352.076.01.26.02 09.2016