Service manual

5. MAINTENANCE
Service Manual CNS-9701 5.5
UPS
Item Check Countermeasure against negative result
Connection to the
UPS
Check that the power cords of the main unit,
display unit and recorder unit are connected
to the UPS. Refer to "Connection Diagram"
in Section 1 "General".
Connect the main unit, display unit and recorder
unit to the UPS with each power cord.
Disconnection from
the UPS
Check that the laser printer is not connected
to the UPS.
Do not connect the laser printer to the UPS.
Output voltage from
the UPS
Check that the line voltage within the range
of ±10% is output from the UPS when the
UPS power cord is disconnected from the
mains voltage.
If the output is out of the range, remove the
cause. Refer to "Power Problem" in Section 2
"Troubleshooting".
Lifetime of the UPS
battery
Check that the UPS battery is not expired. If the battery life time described in the UPS
operator's manual has expired, ask the user to
accept the battery replacement or replace the
battery with a new one.
Safety
Item Check Countermeasure against negative result
Protective earth
terminal
Check that the protective earth terminal of the
UPS is grounded.
Ground the protective earth terminal of the
UPS.
Earth leakage current
of the main unit (refer
to IEC 60950)
Check that the earth leakage current does not
exceed 3.5 mArms under normal condition.
Remove the cause if the earth leakage current
exceeds the maximum value.
Earth leakage current
of the VL-971R/RK
display unit (refer to
IEC 60601-1)
Check that the earth leakage current does not
exceed 0.5 mArms under normal condition
and 1.0 mArms under each single fault
condition.
Remove the cause if the earth leakage current
exceeds one of the maximum values.