Preferred FlexFit 110 - Common Problems & Solutions

5-104 Troubleshooting – Common Problems & Solutions
FlexFit – Linkageless Control – Revision 1.0
PREFERRED
UTILITIES MFG CORPORATION
TT
RR
OO
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BB
LL
EE
SS
HH
OO
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TT
II
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Common Problems & Solutions
Problem Solution
A trip or error message is displayed on the LCD screen. • Find the message from the list of messages above and
follow the steps provided.
LCD screen won't turn on • Ensure power is supplied to the Flame Safeguard
• Ensure the serial cable connecting the Flame Safeguard
to the Combustion Control is in working order.
135-ohm ring rate signal does not change or is not reading
correctly
• Ensure the 135-ohm ring rate controller is wired in
accordance with "Figure 2 – 2 FF-110 BMS Standard
Wiring Diagram (Typical) (Default)" on page 2-16 or
"Figure 2 – 6 FF-CC Wiring Diagram (Typical)" on page
2-19.
• Check terminal 110; no wires should be connected.
• Check that "P3.1.1 Local Firing Rate Control Source" on
page 4-70, is set to 135 Ohm Demand.
4-20 P7810 Demand, 4-20mA boiler outlet, or Thermistor
boiler outlet does not read correctly
• Ensure the detector is wired according to "Figure 2 – 6
FF-CC Wiring Diagram (Typical)" on page 2-19.
• Check that "P3.1.1 Local Firing Rate Control Source" on
page 4-70, is not set to 135 Ohm Demand.
Table 5 – 4 Troubleshooting Chart