106636-02 - 12/19
38
X-2
Installation, Operating & Service Manual
Display / Status
Recommended Corrective Action
StA 10
Retry / Recycle Delay
StA 13
Soft Lockout
1 . No Spark
a. Can you hear sparking while
STA 6
is displayed?
- If there is no spark noise, replace the control.
b. If you can hear spark noise check following:
- Loose connection in ignition cable or ground wire
- Continuity of ignition cable
- Break in ignition cable insulation
- Loose ground connection
- Break in pilot ceramic insulator
- Incorrect pilot spark gap
2 . No Pilot Flame
a. If pilot does not light, check the following:
- All manual gas valves are open
- Supply tubing is not plugged, kinked or leaking
- Gas line pressures are good
- Gas line is purged of air
- Pilot orifice is not plugged (pilot gas is flowing)
- Condensate quenching pilot
Note
: It may be necessary to recycle “call for heat” more than once to clear pilot supply tubes of air.
b. If no gas flow, check following:
- 24 volts across PV and MV/PV at gas valve. If voltage ok, replace defective gas valve
- Check for break in wiring harness to gas valve
- 24 volts across control connector P5–2 and P5–5. If no voltage at control, replace defective control
3 . Spark does Not Stop When Pilot Lights
If spark does not stop when pilot lights, check following:
- Loose connection in ignition cable or ground wire
- Continuity of ignition cable
- Clean flame rod
- Pilot electrode porcelain cracked
- Pilot flame covers flame rod and is steady and blue, if not adjust pilot flame
- Low gas pressure at gas valve inlet
- Defective control
4 . Main Flame Does Not Light
If the main burners do not light, check following:
- Check orifice size and/or blockage
- 24 volts across control terminals P5-8 and P5-5? If no voltage while in
STA 7
, defective control.
- 24 volts across MV and MV/PV at gas valve? Check for break in wiring harness to gas valve
- Defective gas valve
6 .
Circulator is On, Damper is Open But Boiler Fails to Start
(continued)
14
Troubleshooting
(continued)
