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110327-07 - 2/23
ALTA
Combi Installation, Operating & Service Instructions
Table 19-3: Diagnostic Menu
Display
Name
Description
C01
Active Detailed Fault Code
Control has an extensive fault code system with corrective
actions defined. If a fault code exists, it should be first place
to look for diagnosing a problem. Refer to Table 19-6 for
detailed code condition description.
C02
Demand Source
Reason or cause of boiler demand is displayed with
conditions that can prevent a boiler start.
1
Standby
2
Central Heat 1
3
Central Heat 2
4
Domestic Hot Water
5
Sequencer Control
6
CH Frost Protection
7
DHW Frost Protection
8
Boiler On/Off Switch
9
Warm Weather Shutdown
C03
Fan Speed Demanded (RPM x 100)
Control output to blower.
C04
Fan Speed Feedback (RPM x 100)
Should remain close to Fan Speed Demanded. Large
differences may mean there is a problem with blower.
C05
3-way Valve Status (0) DHW, (1) CH
3-way valve and pump status indicate controller 120 VAC
output status.
C06
System Pump On/Off Status
C07
Boiler Pump On/Off Status
C08
Auxiliary Pump On/Off Status
C09
Flame Signal
Flame signal strength displayed in internal calibrated units.
C10
Safety Software Revision
Safety software loaded on control.
C11
Application Software Revision
Application software loaded on control.
C12
Parameter Revision
Indicates factory default parameter setting loaded onto the
control.
C13
Boiler Size Status: (1) 136 combi
(2) 200 combi
(3) 080 heat only
(4) 120 heat only
(5) 150 heat only
(6) 180 heat only
(7) 136 combi (B)
(8) 120 heat only (B)
Read from safety software boiler type status. Must be
confirmed after a control board replacement.
19
Troubleshooting
(continued)
C. Troubleshooting with Diagnostic Codes
In Diagnostic and Quick Menu Mode, use the arrow keys ("
" or "
") to reach "
c
" menu and press "enter" button to
view diagnostic codes.
