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Page GB-39
If the hydraulic pressure is too low, the following messages may be dis-
played:
Depending on the nature of the fault, a corresponding fault message will
appear in the display of the control unit.
The following fault messages are transmitted by the MCBA of the boiler
control unit and are divided into:
- permanent faults (permanent locking) with MCBA error code E-XX or
- temporary faults (self-eliminating locking) with error code B-XX
Alarms from the boiler control
Fault in locking EnX
Fault in blockage BnX
Operational messages from the boiler control
Except for the alarm messages of the MCBA, various operational messa-
ges are shown on the display, e.g.: Automatic bleeding program (autom.
after power failure) hydraulic pressure, maintenance etc...:
LCD display Meaning Action
„Hydraulic pressure min“
„Hydraulic pressure Low“
„Hydraulic pressure High“
below minimum hydraulic pressure
Hydraulic pressure too low
Maximum hydraulic pressure exceeded
Heating system switches off, refill with water
Capacity of heating system is possible up to 50%, refill with water
Heating system switches off, drain water
Detailed information for the alarm messages that the MCBA sends to the
control unit, e.g.: „ERROR .... etc.“ can be found in the operatinginstructions
of the corresponding boiler control unit.
Further processing of errors:
- Errors appear in the standard display of the control
- System errors appear in the info-level at the corresponding infovalue
GB
8A521100_GB.qxd 10.11.2004 12:05 Seite 39
81


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