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Segment
Display
Err 2
Pressure Switch failed to open (contacts stuck closed).
Err 4
Low flame current
Err 6
Flame sensed out of normal sequence (before opening gas valve or after closing gas valve).
Err18
Gas valve relays welded 5 consecutive soft lockouts. A manual reset is required.
Err 23
Flame sensed during prepurge (before gas valve signaled opened).
Err 24
Flame sensed during postpurge (before gas valve signaled closed).
Err 29
Pressure Switch failed to close (contacts stuck open).
Err 32
Sensor 1 Error. Temperature sensor or interface failure (open or short connection, increased
connection resistance, dual sensor mismatch) or failure of A/D conversion (invalid offset or
gain, too many failures duringA/D conversion).
Err 35
Duplicate Zone alarm was received from zone panel.
Err 55
Atmospheric Damper End Switch failed to close (end switch contacts stuck open).
Err 56
Atmospheric Damper End Switch failed to open (end switch contacts stuck closed).
Err 57
Flame Rod shorted to burner ground.
Err 58
AC line frequency error—signal is too noisy or frequency is incorrect.
Err 59
Line voltage error—voltage out of spec high or low.
Err 60
Thermostat input higher than threshold.
Err 61
Line voltage unstable—possibly too many heavy loads switching on and off cause erratic
supply voltage.
Err 62
Soft Lockout—maximum number of retries exceeded. Hard lockout on CSD-1 models.
Err 63
Soft Lockout—maximum number of recycles exceeded.
Err 64
Soft Lockout—electronics failure. Caused by general electronics failure such as relay open or
shorted contacts, flame sensing circuit error, or A to D error. Hard lockout on CSD-1 models.
Err 89
Communication Lost alarm was received from zone panel.
S9361A207X INTEGRATED BOILER CONTROLLERS
Table 9. Error Codes.
Definition
15
69-2751—05
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