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XIV. Troubleshooting
A. Troubleshooting problems where no error code is displayed:
TablE 1.1: nO ErrOr CODE DisPlaYED
CONDITION
POSSIBLE CAUSES
Display Blank, Fan off, LWCO lights off
• No 120VAC Power at boiler. Check breaker and wiring between breaker panel
and boiler
Display Panel Blank, Fan running
• Loose 120VAC connection wiring between boiler J-Box and MCBA
• Blown “F1” fuse in MCBA (see Figure 14.2 for location). Replace with 5A fuse
provided
Display reads “U.125” continuously, Fan running
• Defective AT250 transformer
• Blown “F3” fuse in MCBA (see Figure 14.2 for location). Replace with 4A slow-
blow fuse provided
Boiler not responding to call for heat, Status code on
display =”0” (see Figure 11.1)
• Boiler is not seeing call for heat. Check thermostat or zone wiring for loose
connection, miswiring, or defective thermostat/zone control.
Boiler fires, but display panel is blank
• Loose ribbon cable
• Defective display
Warning
Turn off power to boiler before replacing fuses or working on wiring.
Figure 1.2: MbCa Fuse location
Summary of Contents for FREEDOM
Page 8: ...8 Figure 1 Wall Mounting Hole locations ...
Page 9: ...9 Figure 5 2 Boiler Mounting Hardware ...
Page 11: ...11 Figure 6 1 Boiler Installed In A Confined Space Ventilation Air From Inside ...
Page 42: ...42 FIGURE 7 51 CONDENSATE PIPING ARRANGEMENT ...
Page 55: ...55 Figure 10 1 Wiring Connections Diagram ...
Page 56: ...56 Figure 10 2 Ladder Diagram ...
Page 57: ...57 Figure 10 3 Wiring of Isolation Relay for Control of Two Heating Circulators ...
Page 60: ...60 FCM Series Lighting and Operating Instructions ...
Page 66: ...66 FIGURE 12 2 BASIC MENU TREE ...
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