18
Troubleshooting
Display
Condition
Diagnostic
Corrective Action(s)
FLAME FAULT
Occurs when flame
is detected when
there should be no
flame
Reset using manual switch.
Reset screen on control
panel.
(Power button)
Burner may be operating too hot due to
incorrect combustion.
Check for flame at burner through observation
port with burner off. If flame continues after
shutdown, replace gas valve.
BLDC Fan FAULT
BLDC Fan is unable
to reach required
speed or 0 RPM
when it is turned off.
Reset using manual switch.
Reset screen on control
panel.
(Power button)
Check wire harness for loose connections and
pin engagement at blower connections.
Water heater is in standby mode and fan is not
running. If FAN SPEED is not 0 RPM then
replace the fan.
IGNITION
FAULT
Water heater failed
to light after 10
attempts.
Reset using manual switch.
Reset screen on control
panel.
(Power button)
Check for spark through sight glass.
Check incoming gas pressure to water heater
when off and during ignition. Adjust within limits
on rating plate.
Check for vent pipe and intake pipe restrictions
or blockage
Check burner fasteners and gaskets
Check air intake pipe and orifice
GAS VALVE
FAULT
The Control has
detected a problem
with its gas valve
output circuit
Reset using manual switch.
Reset screen on control
panel.
(Power button)
Check wire harness connections between gas
valve and Control.
If lockout reoccurs, replace Gas valve.
Содержание Marquis TWH180
Страница 24: ...22 Error Codes 1 Flame Detection ...
Страница 25: ...23 Error Codes 2 Gas Detection 3 Sensing air pressure ...
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