Weil-McLain SlimFit Manual page 105

SlimFit
™
commercial condensing gas
Troubleshooting
Make sure to determine the causes of outages. Do not leave the boiler operating without a complete diagnosis.
Sola control lockout causes
Lockout occurs if any of the following occur during the indicated
period:
1. INITIATE Period:
a. A/C line power errors occurred.
b. Four minute INITIATE period has been exceeded.
2. STANDBY Period:
a. Flame signal is present after 240 seconds.
b. Preignition Interlock is open an accumulative time of 30 sec-
onds.
c. Interlock Start check feature is enabled and the Interlock
String is closed for 120 seconds with the controller closed.
(jumpered or welded Interlock).
d. Main Valve is energized.
e. Internal system fault occurred.
3. PREPURGE Period:
a. Preignition Interlock opens anytime during PREPURGE
period.
b. Flame signal is detected for 10 seconds accumulated time
during PREPURGE.
c. Purge Rate Blower RPM fails to close within four minutes
and fifteen seconds after the firing rate motor is commanded
to drive to the high fire position at the start of PREPURGE.
d. Light off Rate Blower RPM fails to close within four minutes
and fifteen seconds after the firing rate motor is commanded
to drive to the low fire position at the end of PREPURGE.
e. Lockout Interlock (if programmed) does not close within
10 seconds.
f. Lockout Interlock opens during PREPURGE.
g. Main Valve is energized.
h. Internal system fault occurred.
4. PRE-IGNITION TIME
a. Lockout Interlock opens.
b. Preignition Interlock opens.
c. Main Valve is energized.
5. MAIN FLAME ESTABLISHING PERIOD (MFEP).
a. Lockout Interlock opens (if enabled).
b. Main Valve is not energized.
c. No flame present at the end of MFEP.
d. Internal system fault occurred.
6. RUN Period:
a. No flame is present, or flame is lost.
b. Lockout Interlock opens.
c. Main Valve is not energized.
d. Internal system fault occurred.
7. POSTPURGE Period.
a. Preignition Interlock does not close in five seconds.
b. Main Valve is energized.
c. Internal system fault occurred.
d. Flame sensed 240 seconds accumulated time after the RUN
period.
Part number 550-100-116/0713
-
fired water boiler
(continued)
Shutdown behavior due to lockout
1. If the lockout interlocks open or a sensor designated as a safety
2. If these open during the firing period, all fuel valves will be de-
3. If the main flame is not detected at the end of the last recycle at-
4. Manual reset is required following any lockout.
5. Manual reset may be accomplished by pressing the push button
6. Interrupting power to the Sola control will cause electrical resets,
Lockouts and alerts
1. See Figure 103, page 106 for common lockout and alert codes.
2. See page 62 for instructions on using the Sola display for lockout
— Boiler Manual
limit are read as defective, the Sola control will lockout and the
blower motor will be de-energized.
energized, the system will complete postpurge, and will lockout
indicated by an alarm.
tempt of the main flame establishing period, all fuel valves will be
de-energized, the device will complete postpurge, and will lockout
indicated by an alarm.
on the Sola module, pressing the SlimFit reset button on top of
the boiler, or by using the Sola display.
but does not reset a lockout condition.
and alert histories.
105