S2200D Operation and Service Manual
P/N 974-9246 Rev 5.00 Jan 18,2022
20
E- Other problems
Green
Light
Red
Light
Error
Code
Symptoms
Possible Problem
ON
OFF
N/A
Blower impeller spins in re-
verse. Low volume air coming
from outlet with yellow flame
and unstable burner opera-
tion.
Wrong Phase (3 PH - reversed
phase)
Incorrect wiring on motor
ON
OFF
N/A
Low temperature output. High
CO
Combustion unstable and/
or burner turns off moments
later.
Changeover valve set to propane
when connected to natural gas (if
applicable)
ON
OFF
Warning
025
High temperature output.
Burner cycles to low fire (for
15 minutes) then off. Burner
then cycles often and is on for
seconds.
Changeover valve set to natural
gas when connected to propane.
(if applicable)
Sensitive/faulty blower hi-limit
switch.
ON
OFF
N/A
Heater will not turn off by
pressing the stop button
Stop switch (red) fails to close
ON
OFF
N/A
No output temperature varia-
tion from low fire to high fire
Stage I valve not adjusted to a
lower value (if applicable)
Appliance regulator adjusted to a
lower value
Defective valve
Thermostat failure
ON
OFF
N/A
Noisy fan operation. Yellow
flame and high CO generation
Fan belt too loose
Cracked belt
ON
OFF
N/A
Noisy fan operation. High
vibration. Structural damage
to fan and/or bearing
Damaged or unbalanced fan
blade
ON
OFF
N/A
Burner cycles more often
Outlet duct too long
ON
OFF
N/A
Noisy operation. Heater body
vibration.
Heater not positioned on a level
surface
ON
OFF
N/A
Static charge. Static shocks.
UV Flame detection works ok Improper grounding
