Servicing; Operating Codes - Buderus 600 - 11S Installation And Maintenance Instructions Manual

5

Servicing

5 Servicing
5.1

Operating codes

NOTE
If the code displayed on the burner-control unit
is not listed under the operating codes or fault
warnings, the burner-control unit itself is
malfunctioning.
Display Display after
pressing the
service button
0
A
C
H
L
U
Y
-.
A
H
Y
=.
H
r
Buderus • http://www.buderus-domestic.co.uk
36 Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 02/2006
Meaning
Buderus 600 - 11S/19S/24S/24C is ready for operation
Burner interval circuit, 10 min. from burner start-up
Waiting for activation of the three-way valve (if fitted) or pump
Stand-by activated, Buderus 600 - 11S/19S/24S/24C ready to provide heat or hot water
Initial safety period: self-testing of burner-control unit during burner start-up
Post- or pre-purging period of fan unit
Flow temperature at adjustment setting
Buderus 600 - 11S/19S/24S/24C running in heating mode
"Chimney-sweep" mode, flow-temperature controller bypassed,
Buderus 600 - 11S/19S/24S/24C heating to previously-entered flow temperature.
Normal heating mode
Service mode
Buderus 600 - 11S/19S/24S/24C running in hot-water mode
Normal hot water mode
Reset
Subject to modifications resulting from technical improvements!