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S
4
®
ERIES
GAS
Troubleshooting
Make sure to determine the causes of outages. Do not leave the boiler operating without a complete diagnosis.
U-Control fault indications
1. The U-Control provides diagnostic information for
both automatic reset conditions and manual reset
conditions. See Figure 117, page 106 for informa-
tion available on the U-Control display.
2. Figure 124 shows the screen behavior during an
automatic or manual reset condition. The table
U-Control display toggles when in lockout, with screen fl ashing red to gray
Part number 550-100-400/0717
-
FIRED WATER BOILER
(continued)
below the display illustration lists manual reset conditions and how
to reset from them.
3. Figure 125, page 118 lists conditions that will cause the control to dis-
play a constant red screen. The boiler will automatically restart if the
condition self-corrects or the technician uses the U-Control's manual
reset screens to reset.
— Boiler Manual
117
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