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If an error code is displayed, or odd behavior of the unit occurs, the fi rst corrective action should be to "Cycle the Power":
Unplug the 120Vac power cord and after 5 seconds plug it in again. If this doesn't clear the fault, proceed with the
"Remedy" in the following table (Table 5).
If wire harness checking is required, examine the integrity of wires themselves, the connector housings, the integrity of
the terminals as well as condition of the crimps.
Fault
Code
Description
Displayed
Invalid Rated
E01, E02
KBtu/Model Type.
E03, E04,
Main Valve Relay
E05, E06
Out Of Sequence.
E07
Flame Detected.
E08
ECO switch is
open.
E09
High temperature
Vent Switch Open.
E10
120Vac too high.
E11
120Vac too low.
E12
E13
Blower Current
abnormal.
E14
48
Cause
Control detects that the
confi guration selected is not
defi ned or the confi guration
has never been set.
Control detects that a relay
used to enable the Main
Valve has failed in either the
open or closed position.
Flame detected when no
fl ame was expected.
Control detects that the
ECO switch is open,
preventing power to the
Main Valve.
Control detects that the High
Temperature Vent Switch is
open, preventing power to
the Main Valve.
120Vac > Overvoltage Limit.
120Vac < Undervoltage
Limit.
Blower Current meets
requirements for a
completely blocked fl ue.
Blower Current meets
requirements for a partially
blocked fl ue.
Blower Current meets
requirements for a non-
heating blocked fl ue
evaluation.
TABLE 5
www.hotwater.com
Lockout
type
Change the main controller board
Continuous
(board).
Soft
Change the board.
1.
Check the fl ame rod.
Soft
2.
Check the fl ame wire harness.
3.
Change the board.
1.
Measure the water temperature.
ECO switch open temperature
is 85±5ºC (185±14ºF) and close
Continuous
temperature is 65±5ºC (149±14ºF).
2.
Check the ECO switch.
3.
Check the ECO wire harness.
4.
Change the board.
1.
Measure the water temperature.
High Vent Switch open temperature
is 74±2.8ºC (165±5ºF) and close
temperature is 57±2.8ºC (135±5ºF).
Continuous
2.
Check the switch.
3.
Check the High Vent Switch wire
harness.
4.
Change the board.
Nominal voltage is 120Vac.
Overvoltage limit is 132Vac,
Undervoltage limit is 102Vac.
1.
Check the power cord.
Auto Reset
2.
Check the wall outlet.
3.
Measure the voltage at the board
connector J7 between pin1 and pin
3. If the voltage is between limits,
change the board.
1.
Check the venting system. If the
venting system is clear, recalibrate
the unit.
Soft
2.
Check the blower wire harness.
3.
Change the blower.
4.
Change the board.
Remedy
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