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TROUBLESHOOTING
LED Status
Control Status
None (LED not on or
Electrical power not
flashing)
present.
Stand-by mode,
One short flash every
Thermostat is satisfied
four seconds
(no faults).
Alternates bright and
Thermostat calling
dim (Heartbeat)
for heat (no fault).
Short flash once every
Weak pilot signal on
second
last call for heat.
Pressure switch not
Two flashes, three
working-closed
second pause
position.
Pressure switch or
Three flashes, three
blower temperature
second pause
switch not working -
open position.
Excessive tank
Four flashes, three
temperature.
second pause
System must be reset.
Five flashes, three
False pilot flame
second pause
present.
Six flashes-one flash,
Failed to light pilot.
three second pause
System auto resets
(Soft lockout)
after 5 minutes.
Pressure switch or
blower temperature
Six flashes-two flashes,
switch opened during
three second pause
burner operation.
(Soft lockout)
System auto resets
after 5 minutes.
Probable Cause
Control power switch in "OFF" position.
Supply voltage interuppted.
Temperature demand is satisfied (no call for heat).
Tank temperature below set point of thermostat.
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.
1. Pressure switch tubing kinked or blocked.
2. Blocked pressure tap on switch.
3. Faulty pressure switch.
1. Vent blockage or improper vent configuration.
2. Pressure switch tubing kinked or blocked.
3. Blower not spinning up to speed.
4. Vent temperature too high
5. Faulty pressure switch or vent limit switch.
1. Thermowell sensor out of calibration.
2. Faulty gas valve.
1. Pilot valve stuck in open position.
1. Unstable pilot.
2. Pilot tube blocked or restricted.
3. Oxidation build up on pilot electrode.
4. Wire damage to pilot assembly or bad connection
at gas valve.
1. Pressure switch tubing kinked or blocked.
2. Vent blockage or improper vent configuration.
3. Vent termination being affected by windy
conditions.
4. Blower not spinning up to speed.
5. Vent temperature too high
6. Faulty pressure switch or blower temp. switch.
41
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