Siemens MOBILETT Plus - Page 24

MOBILETT Plus / - E/ - M SPR8-215.898.01 Page 14 of 22 Siemens-Elema AB
Rev. 05 01.02 SPS-UD Solna, Sweden
2 - 14 Display messages
CAL 26 Generator ON The CMOS memory
cannot be read or
programmed.
• Check all supply voltages on D1,
refer to page 110**.
• Check the voltage in the backup
battery (>2.8 V) and the battery
jumper, refer to page 110**.
• If all power supply voltages are
present, the error is probably on
D1.
If the message "CAL 26" occurs
repeatedly or if the message can
not be acknowledged by pressing
kV+ or switching the unit OFF and
ON, replace D1.
CAL 27 Generator ON
during start-up
Error in ROM mem-
ory. Check sum is
not correct.
• Check that all supply voltages on
D1 are present, refer to page 110**.
• The ROM containing the program
is defective. Replace the software
(IC’s I72, I66 and I74) on D1 ; refer
to page 110**.
• If the error occurs again after
replacing I72, I66 and I74, D1
should be replaced.
Dis-
played
messages
Mode of
operation
Cause Possible reason
* See section "Monitoring the kV- and mA-controls"
** Wiring diagram X037E
Tab. 1