BÜCHI Labortechnik AG
Help with faults | 9
Operation Manual SyncorePlus
43/56
9.2
Error messages
Error message Possible cause
Solution
945
Acceleration of instrument too
high during 1 sec. (first level)
u
Speed will be reduced auto-
matically.
u
Adjust the unbalance com-
pensation.
946
Looped signal from the valve
was available at start but lost
during run
u
Check connection of valve.
u
Check the valve cable.
948
Heater cover missing
u
Check connection to heater
cover.
949
Over temperature in housing.
Board temperature > 70 °C dur-
ing 5 sec.
u
Clean the venting slot.
950
Difference target speed to actual
speed higher than 10 rpm during
6 sec.
u
Check rack load.
u
Restart the instrument.
u
Contact BUCHI Customer
Service.
951
Main voltage during 5 sec. be-
low 198 V (nominal 230 V), 94 V
(nominal 115 V), 80 V (nominal
100 V)
u
Check main voltage.
952
Feedback signal from fan is
missing
u
Check fan for pollution.
u
Restart the instrument.
u
Contact BUCHI Customer
Service.
953
The rise of the heater base tem-
perature during 15 sec. is higher
than expected
u
Check rack.
u
Check thermal connection to
the heater.
975
The fault signal from the valve
driver is still active after 5 resets
of the driver
u
Restart the instrument.
u
Contact BUCHI Customer
Service.
976
Heater was switched on and no
reaction on the temperature
sensor detected after first 20
sec.
u
Restart the instrument.
u
Contact BUCHI Customer
Service.
977
Heater is switched off, tempera-
ture sensor visible, but (at least
one) heater element is not
present
u
Restart the instrument.
u
Contact BUCHI Customer
Service.
978
Motor is on, but no signal from
light barrier during 6 sec.
u
Restart the instrument.
u
Contact BUCHI Customer
Service.
979
Voltage during 1000 ms below/
above 30.0 V ±10%
u
Check power supply or in-
strument for overloading
components like wrong exter-
nal valves or short circuits.
980
Access to EEPROM not possi-
ble
u
Restart the instrument.
u
