Control Board Diagnostics - Bosch C 950 Installation Manual

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)