AERCO XPC GATEWAY Communications - Manual (Page 191)

GF-122 AERCO XPC GATEWAY
191
Table 13 Burner Management Module (BMM) Error Codes - Continued
CODE DESCRIPTION EFFECT CORRECTION RESET
14 Return Sensor fault All burners turned OFF. Check return sensor or wiring. AUTOMATIC
15
Maximum Δ-temperature
protection. Flow
temperature - Return
Temperature > Water Δ-
Temp Protection + 50°F
All burners turned OFF
and Pump ON at
maximum speed. Check the system installation. AUTOMATIC -
when Δ-
temperature < Water Δ-
Temp Protection.
16 Boiler Pipe is frozen.
FlowSensor temperature is
36°F or less. Ignition is inhibited. Pump
runs for 5 min at max
speed. Carefully defrost boiler AUTOMATIC - when
FlowSensor is greater than
41°F.
20 Flame signal detected after
burner is OFF. Ignition is inhibited. Disconnect gas valve wire from BMM. If
failure goes away, check wiring or
change BMM. If failure remains check
or change gas valve. MANUAL - push reset
switch or cycle power.
22 No air flow at burner after
fan started for 30 seconds. Ignition retry after 60
second delay and failure
remains until we have a
successful burner
operation. If fan is stopped, check supply voltage
and fan wiring. If OK try another fan. If
still not working change the BMM.
If fan is not stopped, check the exhaust
gas outlet for blockage. If OK then
check the air pressure switch wiring. If
still not working try another air pressure
switch. If still not working, change the
BMM. AUTOMATIC/MANUAL
23 The air pressure switch
doesn't switch off. Ignition is inhibited. Disconnect the air proving switch. If
problem goes away install a new switch.
If not, check the wiring. If wiring OK then
change BMM. AUTOMATIC