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E12
E13
E14
E15
E16
E17
E18
E19
E20
E21
E22
E23
E24
E25
E26
E27
Blower Current
abnormal.
Blower speed
abnormal.
Proportional
valve (PV) current
unusual.
Outlet
Temperature
Probe is Open
circuit.
Outlet
Temperature
Probe is Short
circuit.
Inlet Temperature
Probe is Open
circuit.
Inlet Temperature
Probe is Short
circuit.
Tank Temperature
Probe is Open
circuit.
Tank Temperature
Probe is Short
circuit.
Blower Current meets
requirements for a
completely blocked flue.
Blower Current meets
requirements for a partially
blocked flue.
Blower Current meets
requirements for a non-
heating blocked flue
evaluation.
Blower speed is 200RPM
below the target speed for
20 seconds.
Blower speed is 500RPM
above the target speed for 6
seconds.
Machine starts or normal
combustion, but Blower
speed = 0 for 3 sec.
Have Blower's output signal
but the Blower speed = 0 for
400ms.
Blower speed stuck > 3000
rpm
Proportional valve Current <
Minimum.
Proportional valve Current >
Maximum.
Outlet Temperature
is < minimum defined
temperature.
Outlet Temperature
is > maximum defined
temperature.
Inlet Temperature is
< minimum defined
temperature.
Inlet Temperature
is > maximum defined
temperature.
Tank Temperature
is < minimum defined
temperature.
Tank Temperature
is > maximum defined
temperature.
TABLE 4
Soft
Soft
Soft
Soft
1. Check the venting system. If the
venting system is clear, recalibrate
the unit.
2. Check the blower wire harness.
3. Change the blower.
4. Change the Control Board.
1. Check the blower wire harness.
2. Change the blower.
3. Change the Control Board.
1. Check the proportional gas valve
wire harness.
2. Change the Control Board.
3. Change the gas valve assembly.
Soft
1. Check temperature probes wire
harness.
2. Replace temperature
probe.
3. Change the Control Board.
Part Number 320169-001
dRaFt Jun 9 130
49
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