User Guide

Page 13
LED Status Control Status Probable Cause Service Procedure
None (LED not
on or flashing)
Electrical power not
present
Control power switch in "OFF"
pos ition.
Su
pp
l
y
volta
g
e interru
p
ted.
Turn Power On
One short flash
every four
seconds
Stand-by mo de,
Thermostat is
satisfied
(
no faults
)
Temperatu re demand is satisfied
(no call for heat)
Normal operation
One short flash
every two
seconds
Stand-by mo de,
Sabbath mo de (no
faults
)
Temperatu re on Setb ack Control is
adjusted down to prevent burner
o
p
eration
Normal operation
Alternates
bright and dim
(
heartbeat
)
Therm ostat calling
for heat (no fault)
Tank t emperature below setpoint of
thermostat
Normal operation
Short flash once
every second
Weak pilot signal
on last call for heat
1.
Unst able pilot
2. Pilot tube blocked or restricted
3. Oxidation build-up on pilot
electrode
4. Wire damage to pilot assembly or
bad connection at
g
as control
1. See Burner Ins p ection on page
15
2-4. See Pilot Ins pection, Testing
and Replacement on page 17
Two flashes,
three second
pause
Pressure switch not
working - close
d
pos ition
1. Pressure switch tub ing kinked or
blocked
2. Blocked pressure tap on switch
or blower
3. Fault
yp
ressure switch
See Pressure Switch Testing and
Replacement on page 35
Three flashes,
three second
pause
Pressure switch or
temperature switch
no t working - open
pos ition
1. V
ent blockage or impro per vent
configuration
2. Pressure switch tub ing kinked or
blocked
3. Faulty pressure switch
4. Blower not spinning up to speed
5. Damper (insi
de blo wer) not fully
opening
6. Faulty blower temperatu re switch
1. Verify cord sets are fully plugged
in
2. See Pressure Switch Testing and
Replacement
on page 35
Fo ur flashes,
three second
pause
Excessive tank
temperature,
system mus t be
reset
1. Temperatu re sens o r out of
calibration
2. Faulty gas control
1. Test Gas
Contro l & Temperature
Sens or
2. Replace gas control if necessary
Five flashes,
three second
p
ause
False pilot flame
present
Pilot valve stuck in open po sition Replace gas control
Six flashes, one
flash, th ree
second paus e
(Soft Lockout)
Failed to light pilot,
system resets aft
er
(5) minutes
1. Un st able pilot
2. Pilot tube block or restricted
3. Oxidation build-up on pilot
electrode
4. Wire damage to pilot assembly or
bad connection at
g
as valve
1. See Burner Ins p ection on page
15
2-4. See Pilot Ins pection, Testing
and Replacement on page 17
Observe the green LED on the water heater gas control. Error
codes are displayed with a 3 second pause before repeating.
Once the error code is known, check and repair th
e water heater,
as recommended in the table below.
Troubleshooting
13