28
Please check guidelines below
.
For
y
our safet
y
, water heater service should be performed onl
y
b
y
a qualified service person
.
Read the
GENERAL SAFETY
I
NFOR
M
AT
I
ON
supplied b
y
the water heater manufacturer
.
1.
“POWER” Flashing
Communication Error
The s
y
stem has detected a
communication error between the
upper and lower controls
.
1
.
Check the 5-conductor data cable that
runs between the upper and lower
controls
.
Check that the wiring is not
broken, and the connectors on both ends
are properl
y
seated in the mating
connectors
.
2
.
Replace the upper control, if the error code
does not clear - c
y
cle power to the water
heater “Off” and “On” to reset
.
3
.
Replace the lower control if the problem persists
.
2.
“HEATING” and “SHORT” Flashing
The self-diagnostic tests have
found a problem with an internal
circuit
.
1
.
Turn the power off for 10 to 20 seconds
then on again to clear the error code
.
2
.
I
f the error code persists or cannot be
cleared, replace the lower control
.
3.
“HEATING” and “OPEN” Flashing
I
gnition/flame failure
.
The water heater has reached the
maximum number of retries and is
currentl
y
locked out for one hour
.
C
y
cle the power to the water
heater off and on to reset
.
1
.
Gas suppl
y
is turned off – pressure too
low
.
Ensure suppl
y
and manifold gas
pressures are within requirements in the
installation manual
.
M
anifold gas
pressure is non-adjustable, if pressure is
off b
y
more than 0
.
3” W
.
C
.
(75 Pa)
replace the lower control
.
2
.
Low suppl
y
voltage – should be 115 –
125
V
AC
.
3
.
Ensure flame sensor is making good
contact with the burner flame, ensure
flame is stead
y.
4
.
Ensure the flame sensor is clean – use
pad
to clean the flame sensor
.
5
.
Ensure the hot surface ignitor is
positioned to provide consistent ignition
.
6
.
Check for an
y
cracks in the ignitor
assembl
y
ceramic insulators – replace
ignitor assembl
y
if damaged
.
7
.
Check resistance of the ignitor at room
temperature (77°F – 25°C) at the plug
end
.
Replace ignitor if the resistance is
not within 1
.
72 to 2
.
4 ohms at room
temperature
.
4.
“HEATING”, “OPEN”, and “SHORT” Flashing
Weak flame sensor current
.
1
.
Ensure flame sensor is making good
contact with the burner flame, ensure
flame is stead
y.
2
.
Ensure the flame sensor is clean – use
ultra fine steel wool or Scotch-Brite pad
to clean the flame sensor
.
5.
“ECO” and “OPEN” Flashing
Water temperature in the tank has
exceeded 185°F (85°C) and has
activated the ECO
.
1
.
Turn the power off for 10 – 20 seconds
then on again to clear this error code
.
2
.
Replace the lower control if the error
code persists
.
ultra fine steel wool or Scotch-Brite
TM
TM
CONTROL DISPLAY STATUS
PROBLEM
SOLUTION
ELECTRONIC CONTROL DISPLAY
ELECTRONIC CONTROL DISPLAY TROUBLESHOOTING
Summary of Contents for Gas Water Heater High Efficiency Atmospheric Vent
Page 34: ...34 NOTES ...
Page 35: ...35 NOTES ...