Bosch Worcester Greenstar CDi Compact ErP Series - Page 68

FAULT FINDING AND DIAGNOSIS
CDi Compact
ErP
- 6 720 813 276 (2015/07)68
Fig. 127 Menu 2 selection
Para
No.
Parameter Description
Updated
value
2.1A Maximum power
CH
Range rate the CH of the boiler.
Adjustment in kW.
The maximum is 24kW.
2.1C Pump head
selection
Select the right pump map
(load and modulation
percentage) to suit the
property.
0 = Variable speed setting
1 to 4 option pump maps
2.1E Pump energy
saving mode
4 = mode ON,
5 = mode OFF
2.1H Minimum pump
speed (pump
speed at maximum
CH burner load)
This parameter is only visible
when 2.1C is set to 0. Then the
min.pump speed can be set.
2.1J Maximum pump
speed (pump
speed at maximum
burner load)
This parameter is only visible
when 2.1C is set to 0. Then the
max.pump speed can be set.
2.2C Air purge mode This feature can be selected to
purge the system and boiler of
air.
0 = off, 1 = auto, 2 = on
2.3B Anti fast cycle time
for CH
This sets the amount of time
between stop and starts of the
main heat exchanger. The
default is 5 minutes, the range
is 3 to 45 minutes.
Table 30 Menu 2 parameters
max
min
max
2
3
1
04
bar
1
ok
eco
reset
e
max
min
max
2
3
1
04
bar
1
ok
eco
reset
e
°C
°F
Menu 2
°C
°F
2.1A kW
6720646608-77.1Wo
1.
°C
°F
Menu 1
2.
°C
°F
Menu 2
2.3C Anti fast cycle flow
temperature
hysteresis
(negative tolerance
only)
This sets the temperature drop
before the burner re-starts, 6°K
is the default. This is used in
conjunction with the “Anti fast
cycle time”
The range is from 2 to 15°K in
1°K steps.
2.3F CH delay after DHW
demand
The default time is 1 minute
and can be adjusted to be
between 0 and 30 minutes.
This feature helps to keep the
DHW heat exchanger hot if
frequent demands are made.
The boiler will not burn extra
gas.
CH will not be heated during
this set time period.
2.5F Service reminder
time
Between 1 and 72 months can
be set
2.7A Operation/fault
indicator (blue
light) activation
0 = The blue light will only
operate as a flashing fault alert.
1 = The blue light will operate
as a boiler operation and fault
alert. This is set to 1 by default.
2.9E Turbine signal
delay
Delay time set to ignore a
temporary DHW demand.
Maximum delay is three
seconds which can be set in
¼ second increments,
e.g. 0.5 seconds is displayed as
2 or 1 second as 4.
2.9F Pump post purge
time for CH
The default pump overrun time
is 3 minutes. This can set
between 3 and 30 minutes. The
actual time will be affected by
the Pump Energy Saving mode.
Para
No. Parameter Description
Updated
value
Table 30 Menu 2 parameters