Siemens MOBILETT Plus HP Service Instructions Manual page 21

Display messages
Dis-
played
messages
Err 18
CAL 19
* See section "Monitoring the kV and mA values"
** Wiring diagram X037E
Tab. 1
Siemens AG
Medical Solutions
Mode of
Cause
operation
Generator ON The change in volt-
The kV value age level in the
changes via the capacitor bank takes
kV+ or kV- but- too long
ton. (> 0.5 s/V). See also
"Err 17".
Generator goes The leakage current
ON before the in the capacitor bank
ready lamp is too large.
glows.
SPR8-220.061.03
Rev. 03
Possible reasons and advice
•
Check whether S10 on D7 is
switched off.
•
Check if any of the capacitors in the
capacitor bank are defective. The
output energy may be consumed
by a defective capacitor (see
section "Battery circuit and power
transmission unit").
•
Check the signals
"CHARGE_HIGH", "DISCHARGE"
and "CHARGE_LOW" (see page
130**). Check fuse U1 on D7, U5
and U8 on D8 and resistors R100
and R101.
The measurement is performed dur-
ing charging at 150 V DC. Charging
is interrupted for 5 s.
If the voltage drops by more than 1.6
V, a message will be displayed.
See also "Err 17".
•
In cases where the generator has
not been operated for several
months, the leakage current in the
capacitors will have increased. Use
the formation program P06 (see
section "P06 - Capacitor
formation").
•
If the unit was in regular use before
the message occurred, the error
may result from increased leakage
current or a damaged capacitor
(see section "Battery circuit and
power transmission unit").
•
Check the capacitance in the
capacitor bank (see section "P03 -
Capacitor bank and charging test"
and page 130**).
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09.03 CS PS 24
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MOBILETT Plus HP