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Pressure Switch failed to open (contacts stuck closed).
Low flame current
Flame sensed out of normal sequence (before opening gas valve or after closing gas valve).
Gas valve relays welded 5 consecutive soft lockouts. A manual reset is required.
Flame sensed during prepurge (before gas valve signaled opened).
Flame sensed during postpurge (before gas valve signaled closed).
Pressure Switch failed to close (contacts stuck open).
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 during A/D conversion).
Atmospheric Damper End Switch failed to close (end switch contacts stuck open).
Atmospheric Damper End Switch failed to open (end switch contacts stuck closed).
Flame Rod shorted to burner ground.
AC line frequency error—signal is too noisy or frequency is incorrect.
Line voltage error—voltage out of spec high or low.
Thermostat input higher than threshold.
Line voltage unstable—possibly too many heavy loads switching on and off cause erratic supply
voltage.
Soft Lockout—maximum number of retries exceeded. Hard lockout on CSD-1 models.
Soft Lockout—maximum number of recycles exceeded.
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.
Over temperature error. Sensors measured temperature in excess of ECO limit. Hard lockout on
CSD-1 models.
S9360A, S9361A, S9380A, S9381A INTEGRATED BOILER CONTROLLERS
Table 8. Error Codes.
Definition
17
66-1203—05
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