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Part number 550-100-131/0120
– 109 –
®
gas
-
fired
water
boiler
— 220/299/300/399
Boiler Manual
Figure 105
Troubleshooting suggestions for
Evergreen
®
boilers
—
Fault displays, diagnostics and corrective actions
Troubleshooting
(continued)
Display
Condition
Diagnostics
Corrective Action(s)
IGNITION
FAULT
Boiler went through 5 ignition
attempts and never detected
flame or flame sense value
never reached minimum
threshold for boiler model.
Automatically resets after 1 hour
or can be reset by performing
manual reset on boiler.
Check condensate trap for blockage allowing condensate to accumulate
inside heat exchanger.
Check ignition cable connection.
Fouled, worn, bent, or faulty igniter.
Fouled igniters can be cleaned for additional use with steel wool.
Worn or badly fouled igniters should be replaced with the proper repair
part.
Igniter rods should be parallel with a 3.5 mm (0.138 in) spark gap.
NOTICE: Thin white deposits on the igniter are typical, but brown or
black deposits could be the result of flue gas recirculation. Thoroughly
inspect the venting system and termination for the possibility of leakage
or flue gas feedback into the air line.
Dirty burner and/or heat exchanger will cause high back pressure and
poor ignition.
Follow procedure in maintenance section of this manual to clean burner
and heat exchanger. Visual inspection of flueways may not be sufficient
to diagnose condition.
Check combustion settings on high and low fire and adjust per setup
instructions if necessary.
Check incoming gas pressure with boiler off and at high fire. Adjust
within limits on rating label.
Verify correct boiler model and altitude is selected in control and correct
elevation must be entered when operating above 2,00 feet.
Check ignition cable resistance. Should measure 1000 Ohms (+/- 50
Ohms).
Check for flue pipe and intake pipe restrictions or blockage.
Check burner fasteners and gaskets.
Check venturi gaskets and proper venturi. (Propane models use different
venturi’s).
OUTDOOR
SENSOR ERROR
Outdoor temperature sensor
short or OPEN.
Will automatically reset if the
condition clears.
Warning only. Supply Max is
targeted until ODT is restored, if
used for target adjustment.
Determine which sensors are suspect and measure their resistance
value and compare it to the values shown in Figure 99, page 103. If the
resistance values are incorrect replace the temperature sensor. Refer to
repair parts section for proper part number.
Check wire harness for loose connections and pin engagement at sensor
connection, chassis mount connection through control housing, and
the control. Unplug connection at sensor and at control and check
continuity between ends.
If problem persists after checking items above, replace control. Refer to
repair parts section for kit number.
AIR PRESSURE
Switch Open
Occurs when Air Pressure
connection is open.
Reset using Manual Reset
screen on display.
High pressure in the exhaust
pipe or high vacuum in the
boiler intake or cabinet has
caused the air switch to open.
The switch is closed in normal
operating conditions.
Check boiler size selected in control against boiler rating label. Correct if
necessary to select the proper boiler size.
Check exhaust and intake pipe for restrictions or blockage.
Check condensate drain for blockage. If condensate is unable to drain
out of the boiler it can begin to block the flow of exhaust gases. Clean
the condensate collection area of the base and condensate trap. Refill
trap with fresh water.
Check the P7 connection as seen on Figures 65, page 59 &
Figure 66, page 60. Check the connections on the pressure switch.
Closure Switch
fault
Proof of Closure connections
on P7 Pins 2 and 3 are open.
Soft lockout for 3½ minutes
boiler retries. Each consecutive
failure adds 1 minute to
lockout time, up to 6½ minutes
maximum.
None - Check jumper on correct pins and secure connection. Flow switch
attached - Check correct pump is on, check wiring to flow switch, and
check switch is closing CAD - Check voltage to damper. Check damper
is opening.