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13
TROUBLESHOOTING
(In addition to instruction manual.)
LED Status Control Statu
s
Probable Cause
None (LED not on
or flashin
g)
Electrical pow er not
p
resent
1. Control power switch in "OFF" position
2. Su
pp
l
y
volta
g
e interru
p
ted
One short flash
every four
seconds
Stand-by mode,
Thermostat is satisfied (no
faults
)
Temperature demand is satisfied (no call for
heat)
Alternates bright
and dim
(
heartbeat
)
Thermostat calling for heat
(no fault)
Tank temperature below setpoint of
thermostat
Short flash once
every second
Weak pilot signal on last
call for heat
1. Unstable pilot
2. Pilot tube block or restricted
3. Oxidation build-up on pilot electrode
4. Wire damage to pilot assembly or bad
connection at gas valve
Two flashes,
three second
p
ause
Relay not working Faulty relay
Three flashes,
three second
p
ause
Relay not working Faulty relay
Four flashes,
three second
p
ause
Excessive tank
temperature, system must
be reset
1. Thermal well sensor out of calibration
2. Faulty gas valve
Five f lashes,
three second
p
ause
False pilot flame present Pilot valve stuck in open position
Six flashes, one
flash, three
second pause
(Soft Lockout)
Failed to light pilot,
system resets after (5)
minutes
1. Unstable pilot
2. Pilot tube block or restricted
3. Oxidation build-up on pilot electrode
4. Wire damage to pilot assembly or bad
connection at gas valve