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Control Board Diagnostics - Bosch C 950 Installation Manual

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Program
Description
P1
Maximum Power
P2
Minimum Power
P3
Remote
Controls installed
P4
Access to
Diagnostic Mode
P5
Cascade Mode
P6
Temperature Unit
P7
Gas type selection
P8
Back light
P9
Fan Purge
PH
Cascading type
PC
Primary/Secondary
mode
Table 49 Program values, factory default settings and ranges.
7.7

Control board diagnostics

1. Press ON/OFF button
into ON.
2. Press and hold simultaneously buttons
seconds, until display reads P2.
3. Press
to enter P2 adjustment. The current setting will appear on
P
the display. If not, repeat process.
4. Press and release the
button on the control panel until the
P
display reads 'P4'. You are now in the diagnostic mode of the control
board.
5. When the display reads 'P4', press and release the
again and the display should read 'E'.
+
6. Use the
and
button on the control board to cycle through
different diagnostic modes available.
7. Once in the selected diagnostic mode of your choice, press and
release the
button to display the diagnostic information.
P
EXAMPLE: to read the flow rate in gallons per minute while the unit is
flowing water, cycle to the '3d' mode and press the
reading of 25 on the display would indicate the heater is reading a flow
rate of 2.5 gallons/minute.
8. Once the information is obtained, press the
return to the diagnostic mode menu and scroll to addition diagnostic
information.
9. Press ON/OFF button to turn OFF the appliance and back ON again to
return heater to normal function.
Greentherm
Factory Default
MIN
C950ES/
C950ES
C1050ES
C1050ES
NG: 46,
NG: 51,
21
LP: 46
LP: 52
NG: 10,
NG: 8,
LP: 13
LP: 11
_0
_0
E
0d
NO
NO
°F
°F
LP or NG
Not
dE
dE
Available
IC
IC
CS
CS
+
or
and
for 3
P
+
button once
button. A
P
button again to
P
MAX
C950ES
C1050ES
NG: 48,
NG: 53,
LP: 48
LP: 53
note: reducing P1 values below maximum will
reduce maximum power of the appliance.
20
6
10f
CC
°C
Not
On
dE turns back light off after 60 seconds from
Available
last button pushed, ON turns backlight on
Runs secondary fan and primary fan when P9
is selected by depressing the "P" - button
SC
This menu is only available when cascade
Contact Bosch Water Heating for details.
Cn
Diagnostic menu
E
0d
Heat exchanger water temperature
1d
2d
3d
4d
Bypass control monitor (°F) [0d - 2d]
5d
6d
7d
8d
9d
1F
2F
3F
4F
5F
6F
7F
8F
9F
Table 50 * Settings define from factory
Maintenance and service | 45
Comment
see chapter 4.14, page 36
see chapter 4.3.8, page 22
see chapter 6.5, page 40
see chapter 7.7, page 45
contact Bosch for details
Preset from factory.
Contact Bosch for details.
permanently.
mode is selected CC.
Entry/Exit into sub-modes
Inlet water temperature (°F)
Outlet water temperature (°F)
Water flow (gallons/min)
Fan speed (Hz)
Burner power (%)
Maximum power (kW)
Back flow temperature (°C)
Exhaust temperature (°C)
Most recent error/failure
2nd most recent error
3rd most recent error
4th most recent error
5th most recent error
6th most recent error
7th most recent error
8th most recent error
9th most recent error
6 720 805 440 (2014/11)

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This manual is also suitable for:

1050 esC 950 esC 1050 es