Crown Boiler BWF Series Installation Instructions Manual page 51

13. Troubleshooting (continued)
Error
Code Meaning
2
Pressure Switch failed to open
4
Low Flame Signal
Pilot Flame detected when no
6
flame should be present
18
Internal electronics failure
Flame sensed during 30s pre-
23
purge (before pilot valve opened)
29
Air pressure switch failed to close
Boiler water temperature sensor
32
failure
35
Duplicate Zone
57
Grounded pilot electrode
58
AC Power Frequency Error
Line voltage error
59
(Supply voltage too high or low)
Thermostat input higher than
60
threshold
61
Line Voltage Unstable
63
Maximum recycles exceeded
64
Internal failure
89
EnviraCom communication lost
109836-01 - 04/20
Table 13.0: Error Codes
Possible Cause
• Jumped air pressure switch
• Condensate in air pressure switch or switch tubing
• Defective air pressure switch
• Low gas pressure at gas valve inlet
• Partially plugged pilot tubing or pilot orifice
• Loose connection in ignition cable or ground wiring
• Dirty pilot electrode/ground strap
• Pilot electrode porcelain cracked
• Damaged pilot hood/ assembly
• Defective control
• Defective gas valve
• High gas pressure
• Defective control
• Possible internal problem with boiler control. Cycle power to the boiler and
replace control if problem persists.
• Defective gas valve
• High gas pressure
• Defective control
• Vent system blockage
• Vent system not constructed in accordance with installation manual (excessive
length, undersized pipe, wrong terminal, etc)
• Condensate or leakage in air pressure switch tubing
• Winds in excess of 40mph
• Loose sensor connection at control
• Defective Sensor
• Defective control
Error code reserved for future use
• Condensate or foreign material is shorting pilot electrode to ground.
• Ignition cable insulation is damaged and touching ground.
• Pilot is damaged
• 120VAC power supply frequency is incorrect (Should be 60Hz)
• 120VAC power supply is dirty (consult electrician and/or Utility)
• Boiler water temperature sensor common (center wire) is damaged and
shorted to ground
• Power supply voltage is incorrect (should be 120VAC nominal)
• Defective or incorrect 24VAC transformer
• Loose 120VAC connection or 24VAC connection between transformer and
control
• External voltage is applied to thermostat connections (most common cause is
external transformer in old thermostat wiring.
• 120VAC power supply is dirty (consult electrician and/or Utility)
• Loose 120VAC connection or 24VAC connection between transformer and
control
• Large electrical loads elsewhere on the installation are switching on and off,
causing incoming voltage to swing excessively at boiler.
• See Error Code 4 above (boiler lost proof of pilot 6 times in a row)
• Improper pilot operation
• If problem persists, replace control
Should not be observed on this boiler.
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