Honeywell S9360B Installation Instructions Manual page 19

S9360B, S9361B, S9370B, S9371B, S9380B, S9381B INTEGRATED WATER HEATER CONTROLLERS
Table 7. Error codes.
Segment Display Definition
Communication between the PWB and the display is corrupted.
Pressure Switch failed to open (contacts stuck closed).
Flame sensed out of normal sequence (before opening gas valve or after closing gas
valve).
Flame sensed during prepurge (before gas valve signaled opened).
Flame sensed during postpurge (before gas valve signaled closed).
High Limit Switch open
Pressure Switch failed to close (contacts stuck open).
Sensor 2 Error. Temperature sensor or interface failure (open or short connection) or
failure of A/D conversion (invalid offset).
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.
Line voltage unstable—possibly too many heavy loads switching on and off cause
erratic supply voltage.
Soft Lockout—maximum number of retries exceeded.
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.
Over temperature error. Sensors measured temperature in excess of ECO limit.
19 69-1792—09