Siemens MOBILETT Plus Service Instructions Manual page 19

Display messages
Dis-
played
messages
Err 18
CAL 19
* See section "Monitoring the kV- and mA-controls"
** Wiring diagram X037E
Tab. 1
Siemens-Elema AB
Solna, Sweden
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). Refer
also to "Err 17".
Generator goes The leakage current
ON before the in the capacitor bank
ready lamp is too large.
glows.
SPR8-215.898.02
Rev. 01
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, refer to
section " Capacitor bank".
•
Check the signals
"CHARGE_HIGH", "DISCHARGE"
and "CHARGE_LOW", refer to
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 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 has increased. Use the
formation program P06, refer to
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,
refer to the section "Capacitor
bank".
•
Check the capacitance in the
capacitor bank, refer to the section
"P03 - Capacitor bank and
charging test". Refer also to page
130**.
Page 9 of 22
01.02 SPS-UD
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MOBILETT Plus/ Plus E