Crown Boiler AWR Series Installation Instructions Manual page 44

Error
Code Meaning
Low Flame Signal
4
Pilot Flame detected when no
6
flame should be present
Internal electronics failure
18
Flame sensed during 1.7s pre-
23
purge (before pilot valve opened)
Boiler water temperature sensor
32
failure
35 Duplicate Zone
Damper failed to open after 60s
55
Power at end of limit string when
56
it shouldn't be.
Grounded pilot electrode
57
58 AC Power Frequency Error
Line voltage error
59
(Supply voltage too high or low)
Thermostat input higher than
60
threshold
Line Voltage Unstable
61
63 Maximum recycles exceeded
64 Internal failure
EnviraCom communication lost
89
TABLE 13.0 - ERROR CODES
Possible Cause
• 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
• Loose sensor connection at control
• Defective Sensor
• Defective control
Error code reserved for future use
• Loose or defective damper harness
• Obstruction in path of damper blade
• Defective damper
• Defective control
• Control, vent damper, or damper harness is defective. With Error 56 present, and no
call for heat, unplug damper harness from control and check for 24VAC between ter-
minal P6-5 on control (see Figure 9.2 for location) and ground. If voltage is present,
replace control. If not, inspect the damper harness for shorts or miswired connections.
If no harness defect is found, replace vent damper.
• 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)
• Loose or defective damper harness
• Obstruction in path of damper blade
• Defective damper
• Improper pilot operation
• If problem persists, replace control
Communication lost between boiler control and EnviraCom thermostat
44