Crown Boiler AWR Series Installation Instructions Manual page 45

Displayed
Codes Problem
StA 1
Burners and
tt OFF
Circulator Off
dh OFF
StA 1
Burners Off
Circulator On
tt On
Boiler Warm
tt On
Heating Circulator
Off
dh On DHW Circulator Off
Burners Off and
Damper is closed.
StA 15 Green LWCO light
is on. Yellow light
is off.
Burners Off and
Damper Closed.
StA 15
Both Green and
Yellow lights are on.
No spark at pilot
StA 6
Spark, but no pilot
StA 6
flame
Pilot flame present,
but spark does not
StA 6
shut off
Pilot flame present,
spark off, but Main
STA 8
Burner does not light
at all
Main burner
lights, but shuts off
StA 10
immediately
StA 10
No spark or pilot
or StA 13
TABLE 13.1 - FAULTS WITHOUT ERROR CODE PRESENT
Possible Cause
• Thermostat/s not calling for heat
• Loose connection in thermostat, zone valve end switch, or zone panel wiring.
• Thermostat, zone valve, or zone panel miswired
• Defective thermostat, zone valve, or zone panel
• Boiler off on high limit (normal operation)
• Boiler off on thermal purge (normal operation - See Table 11.6)
• Heating Circulator is being forced off on DHW priority (normal operation if Pt=ON - see
Table 11.7).
• See causes for "DHW Circulator off " below
• Loose connection in circulator wiring
• Defective circulator
• Circulator is running, but system problem is preventing circulation
• External limit is open or jumper plug is missing.
• Blocked vent switch (BVS) open due to problem with vent system, such as a blocked
chimney, or a combustion air supply problem. Correct and press reset button on BVS.
• Flame roll-out switch (FRS) open due to blocked heat exchanger. Correct problem and
replace FRS with exact replacement (see parts list)
• Low water condition exists in boiler. Verify that boiler and heating system are completely
filled with water.
• Temperature probe is not inserted into well.
• Loose connection in ignition cable or pilot ground
• Damaged electrode porcelain or ignition wire insulation (replace pilot)
• Pilot electrode or Ground strap damaged (replace pilot)
• If you cannot hear spark at all , replace control
• Low inlet gas pressure
• Plugged, kinked, or leaking pilot tubing
• Plugged pilot orifice
• Gas line not purged of air
• Defective pilot assembly
• Defective gas valve (before replacing, confirm that there is 24VAC between PV and MV/
PV. If there is not, control harness is loose or the control itself is defective).
• Loose connection in harness between control and gas valve.
• Low inlet gas pressure
• Partially plugged, kinked, or leaking pilot tubing
• Partially plugged pilot orifice
• Loose connection in ignition cable or pilot ground
• Damaged electrode porcelain or ignition wire insulation (replace pilot)
• Pilot electrode or Ground strap damaged (replace pilot)
• Defective Control
• Loose connection in harness between control and gas valve
• Defective gas valve (before replacing, confirm that there is 24VAC between MV and MV/
PV. If there is not either there is a loose connection in the control harness or the control
itself is defective).
• Low inlet gas pressure
• Partially plugged, kinked, or leaking pilot tubing
• Partially plugged pilot orifice
• Pilot was either never established or proof of pilot was lost after it was lit. Cycle power to
the boiler and look for symptoms above.
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