Crown Boiler BWF Series, Supplement Manual

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15
TABLE 13.0: ERROR CODES
Error
Code Meaning Possible Cause
2 Pressure Switch failed to open
Jumped air pressure switch •
Condensate in air pressure switch or switch tubing •
Defective air pressure switch •
4 Low Flame Signal
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 •
6
Pilot Flame detected when no
flame should be present
Defective gas valve •
High gas pressure •
Defective control •
18 Internal electronics failure
Possible internal problem with boiler control. Cycle power to the boiler and •
replace control if problem persists.
23
Flame sensed during 30s pre-
purge (before pilot valve opened)
Defective gas valve •
High gas pressure •
Defective control •
29
Air pressure switch failed to
close
Vent system blockage •
Vent system not constructed in accordance with installation manual (exces- •
sive length, undersized pipe, wrong terminal, etc)
Condensate or leakage in air pressure switch tubing •
Winds in excess of 40mph •
32
Boiler water temperature sensor
failure
Loose sensor connection at control •
Defective Sensor •
Defective control •
35 Duplicate Zone Error code reserved for future use
57 Grounded pilot electrode
Condensate or foreign material is shorting pilot electrode to ground. •
Ignition cable insulation is damaged and touching ground. •
Pilot is damaged •
58 AC Power Frequency Error
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
59
Line voltage error
(Supply voltage too high or low)
Power supply voltage is incorrect (should be 120VAC nominal) •
Defective or incorrect 24VAC transformer •
Loose 120VAC connection or 24VAC connection between transformer and •
control
60
Thermostat input higher than
threshold
External voltage is applied to thermostat connections (most common cause is •
external transformer in old thermostat wiring.
61
Line Voltage Unstable
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.
63 Maximum recycles exceeded See Error Code 4 above (boiler lost proof of pilot 6 times in a row) •
64 Internal failure
Improper pilot operation •
If problem persists, replace control •
89 EnviraCom communication lost
Should not be observed on BWF or CWD Series Boilers.