6
2
Fault Displays
32
15.4 Sensor breakage or short circuit
The sensor must be exchanged by qualified service
personnel. Please return unit for repairs.
15.5 Undefined fault
This can be caused by fault which only occurs for a
short period of time, i.e. with a fluctuating bath level
when the filling level is very close to minimum.
Before returning the unit, top up with heat transfer liq-
uid. This fault can often be remedied in this way!
In all other cases this unit must be checked by qualified
service personnel.
15.6 Range exceeded
The set value and high limit value are cyclically
checked for their validity. The fault message “B Err” is
shown on the display in case of the range being ex-
ceeded. The heating is switched off.
⇒
Switch the unit off and start it up again according
to the instructions detailed in chapter 13.10.
⇒
Return the unit for repairs in case of repeated
faults.
15.7 Parity fault
All data is saved together with a corresponding parity
bit in the permanent storage (SRAM). When this data
is accessed, the respective parity bit is checked. In
case of a parity fault the fault display “S Err” is shown
on the display. The heating then shuts itself down.
⇒
Switch the unit off and start it up again according
to the instructions detailed in chapter 13.10.
⇒
Return the unit for repairs in case of repeated
faults.
15.8 External fault
The DC5 can be switched to fault status via the
RS232C interface. In this case see chapter 17.6 (com-
mand “ER”).
15.9 Fault eliminated?
After the fault has been eliminated, the cause of the
fault is shown on the display 6 (e.g.
). The pre-
ceding three zeros mean that the fault has been elimi-
nated
The reset key 2 must be pressed in order to start up
the unit again.
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