Service Manual

Page 5
LED Status Control Status Probable Cause Service Proce dure
None (LED not on
or flashing)
Gas valve is not
powered.
1. Pilot flame is not
present. Light pilot.
If th e pilot will not stay lit
replace th ermopile, see
page 11. If problem
pe
rsists replace gas
valve, see
p
a
g
e 15.
On e flash and
th ree second
pause.
1. If set point knob is in
"PILOT" position th en
pilot flame is detected.
Turn set point knob to
desired setting
2. If set point knob is at
desired
settin g th e gas
valve is waiting for a
call for heat
(
no faults
)
.
1. Gas valve is
powered and waiting
for the set point knob to
be tu rned to a water
temperatu re setting.
2. Temperature
demand is satisfied.
Normal operation.
Adjust
th ermostat to desired
temperatu re level.
LED strobe (tw o
qui ck flashes) and
th ree second
p
ause.
Thermostat calling for
heat (no faults).
Tank temperature
below setpoint of
th ermostat.
Normal operation.
LED on
continuously.
Set point knob has
been recently tu rn ed to
th e "OFF" position.
Wait until LED goes out
before attemptin g to
reli
g
ht
Set point knob was
tu rn ed to "OFF"
position.
LED will go out and the
control will function
normally wh en th e pilot is
lit.
Two flashes and
th ree second
pause.
Weak pi lot flame
detected. Syst
em will
reset when pilot flame
is sufficient.
1. Thermopile failure
2. Unstable pilot.
3. Pilot tu be block or
restricted.
4. Resettable thermal
switch has o
p
ened.
1. See page 10.
2&3. See page 12.
4. See page 18.
Observe green LED indicator on
gas control. Errorflashcodes are
displayedwith athree second
pause before repeating. Check
andrepair thesystem as noted in
thetroubleshooting table below.
Gas Control Troubleshooting
GreenLED
Indicator
ECO-MAGNUM
75/100-Gallon Atmospheric
5