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XIV. Troubleshooting
A. Troubleshooting problems where no error code is displayed:
TABLE 14.1: 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 13.2 for location). Replace with 5A fuse
provided
Display reads “U.125” continuously, Fan running
• Defective AT250 transformer
• Blown “F3” fuse in MCBA (see Figure 13.2 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
fi
res, but display panel is blank
• Loose ribbon cable
• Defective display
WARNING
Turn off power to boiler before replacing fuses or working on wiring.
Figure 14.2: MBCA Fuse Location
Содержание FREEDOM FCM120
Страница 8: ...8 Figure 5 1 Wall Mounting Hole Locations ...
Страница 9: ...9 Figure 5 2 Boiler Mounting Hardware ...
Страница 11: ...11 Figure 6 1 Boiler Installed In A Confined Space Ventilation Air From Inside ...
Страница 22: ...22 Figure 7 10 Installation of Reducing Elbow on Concentric Boiler Collar Figure 7 11 Dimension L ...
Страница 24: ...24 Figure 7 14 Preparing Terminal Section for Installation in the Wall Figure 7 15 Attaching Terminal Section ...
Страница 31: ...31 Figure 7 21 Condensate Piping Arrangement ...
Страница 37: ...37 Figure 9 4c Modular Boiler Piping Figure 9 4b Piping Method 1 Indirect Water Heater Loop Piping Shaded ...
Страница 44: ...44 Figure 10 1 Wiring Connections Diagram ...
Страница 45: ...45 Figure 10 2 Ladder Diagram ...
Страница 46: ...46 Figure 10 3 Wiring of Isolation Relay for Control of Two Heating Circulators ...
Страница 49: ...49 FCM Series Lighting and Operating Instructions ...
Страница 55: ...55 FIGURE 12 2 BASIC MENU TREE ...
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Страница 75: ...75 NOTES ...
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