29
IGNITION MODULE SYSTEM
Before calling your service agent, the following checklist should
be examined to eliminate obvious problems from those requiring
replacement or servicing.
Check that “main manual gas shutoff valve” is fully open
•
and that gas service has not been interrupted.
Check that after following the appliance OPERATING
•
INSTRUCTIONS, the “Top Knob” of the appliance gas valve
is in “ON” position.
Check electrical supply to the appliance for possible blown
•
(or tripped) fusing or power interruption.
Is the water temperature in tank below the thermostat dial
•
setting on the appliance thermostat (calling for heat)?
It is possible that the high limit (E.C.O.) has functioned
•
to shut off the appliance. See FEATURES — Water
Temperature Control for reset procedure. Contact
your serviceman if limit continues to function to shut off
appliance.
SYSTEM DIAGNOSTICS
Your water heater is equipped with an ignition module that
incorporates a diagnostic system to assist in troubleshooting the
appliance. The indicator codes on the ignition module are as
follows:
TABLE 10:
1 FLASH
System lockout (retries or cycles exceeded)
2 FLASHES
Pressure switch stuck close
3 FLASHES
Pressure switch stuck open
4 FLASHES
Open on high temperature limit switch (eco)
6 FLASHES
115 volt AC power reversed (check polarity)
7 FLASHES
Low
fl
ame sense signal (make sure
fl
ame
sensor is in burner
fl
ame)
8 FLASHES
Check ignitor
continuous
fl
ash -> continuous
fl
ame sensed > 5 seconds without
gas valve
continuous on -> internal control failure - replace ignition control
module.
Use this diagnostic system in conjunction with the “OPERATIONAL
CHECKLIST” and the “SEQUENCE OF OPERATION” to
troubleshoot the appliance.
Put cap with male adapter back on the container and slide
4.
3/4” hose over end of male adapter and fasten in place using
hose clamp provided.
Delime using Flo-Jug Method
Slide the hose clamp over end of hose and slide hose over
5.
the male adapter in the water heater drain opening and
secure in place using hose clamp.
Lift container to the “Pour” Position, see Figure 28, being
6.
careful to keep the vent in the handle above the liquid level
and pour the UN•LIME into the heater.
Lower container, you may have to place the container on its
7.
empty carton to prevent the UN•LIME from
fl
owing back into
the container.
Let UN•LIME remain in the heater for 5 minutes and then
8.
lower the container to the “Drain” Position, see Figure 28.
Deliming activity is indicated by foaming on the surface of
9.
the UN•LIME. If there is deliming activity, repeat steps 6
thru 8.
Normally, lime removal will be completed within one hour.
Severe build-up of lime may take longer than an hour to complete
descaling.
Note: To check UN•LIME for continued use, place some scale
or white chalk in a glass with a small amount of UN•LIME. If
the material is vigorously dissolved by the UN•LIME, it can be
reused; if not, the UN•LIME should be replaced.
FIGURE 28
SERVICE
The installer may be able to observe and correct certain problems
which may arise when the unit is put into operation. HOWEVER,
it is recommended that only quali
fi
ed servicemen, using
appropriate test equipment, be allowed to service the heater.
As preliminary step, check wiring against diagram, check for
grounded, broken or loose wires. Check all wire ends to be sure
that they are making good contact.
ELECTRICAL SERVICING
LABEL ALL WIRES PRIOR TO DISCONNECTION WHEN SERVICING
CONTROLS. WIRING ERRORS CAN CAUSE IMPROPER AND
DANGEROUS OPERATION.
VERIFY PROPER OPERATION AFTER SERVICING.
