Checking The Device Leakage Current - Sirona ORTHOPHOS SL 2D Service Manual

10 Maintenance
10.17 Checking the device leakage current
466
10.17

Checking the device leakage current

DANGER
Perilous shock hazard!
It is essential to switch the unit off and to wait at least one more 1 minute
before beginning the check!
Ensure that the unit is not unintentionally turned back on.
NOTICE
Important information on building installation
The connection and disconnection of the unit (power cable) to/from the
building 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
Automatic tester in accordance with IEC 62353
illustration) which complies with standard IEC 62353. If you do not use an
automatic 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
SL unit leakage current
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.
IMPORTANT
According to Note 2 in Table 3 of standard IEC 62353:2014, the
maximum device 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
document
(REF 64 95 100) to identify changes from the original value.
A maximum deviation of ±20% from the original value is
permitted for the measured leakage current.
If a deviation from the original value is >±20%:
8.
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).
"Inspection and maintenance and safety-related checks"
Sirona Dental Systems GmbH
Service Manual ORTHOPHOS SL
64 95 258 D3632
D3632.076.01.03.02 09.2016