Honeywell S9360A Installation Instructions Manual page 15

Segment
Display
Pressure Switch failed to open (contacts stuck closed).
Err 4 Err Low flame current
Err 8
Flame sensed out of normal sequence (before opening gas valve or after
1
Err 4
closing gas valve).
Err Err 8 Gas valve relays welded 5 consecutive soft lockouts. A manual reset is
1 1
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 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. 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.
S9360, S9361, S9370, S9371 INTEGRATED BOILER CONTROLLERS
Table 7. Error Codes.
Definition
15 69-2076—03