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11
DIAGNOSTIC ERROR CODES
WARNING:
If an operational problem has occurred, the boiler will
shut off and show an "A", "E" or "H" in the mode display,
along with an error code in the temperature display.
Do not attempt performing any service under these
conditions, but do note the mode and temperature dis-
play indication, in case the problem clears itself. An "A"
indication error can be cleared by pressing the reset
button once, which will allow re-try of operation. Do not
repeatedly press the reset button in this case, or if an
"E" or "H" indication error is displayed. Call a trained,
experienced service technician to troubleshoot and cor-
rect the problem. The Bobcat Installation and Operating
Instructions, publication B-40 contain a full troubleshoot-
ing section for this. Turn off all electric power ot the boil-
er before service.
A. LOCKOUT ERRORS:
Indicated by an "A" in the mode display. The reset
button must be pressed to clear the error and retry
operation. The temperature display shows the error
code.
ERROR
CODE
Ignition Failure - 3 unsuccessful ignition
01
Flame Failure - 3 losses of flame signal
02
03
Water High Limit Open
04, 05, 09,
10, 12, 13,
14, 15, 16,
18, 32
19, 20
Flame Detected at Wrong Time
33
Fan Failure - RPM Error
B. BLOCKING ERRORS:
Indicated by an "E" in the mode display. Operation is
automatically restored, once the condition returns to
normal or is fixed. The temperature display shows
the error code. Pressing the "Reset" button is not
required.
INDICATION
attempts in a row
during one demand
Control Failure
Bobcat Model B-120A and B-200A
ERROR
CODE
01
Water Outlet Sensor Open
02
Water Inlet Sensor Open
03
Flue Gas Sensor Open
11
Water Outlet Sensor Shorted
12
Water Inlet Sensor Shorted
13
Flue Gas Sensor Shorted
19, 42,
45, 46,
47, 48
20
Flame Detected at Wrong Time
21
22
24
Earth Connection Faulty
30
Excess Flue Temperature
31
Low Water Cutoff Error
32
Excess Water Inlet Temperature
51
52
Boiler Model Selection Error
C. WARNING ERRORS:
Indicated by an "H" in the mode display. Operation
of the space heating mode is not affected, and the
warning is displayed intermittently. Operation of the
DHW mode is automatically restored, once the
condition is fixed. The temperature display shows
the error code. Pressing the "Reset" button is
not required.
ERROR
CODE
04
Domestic Hot Water Tank Sensor Open
14
Domestic Hot Water Tank Sensor Shorted
INDICATION
Control Failure
Polarity Error
Frequency Error
Reset Button Error
INDICATION
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