39
Excessive air temperature due
to poor air flow
Check that the horizontal and
(vertical if fitted) louvres are
sufficiently open (see
installation).
Check fan is operating correctly
with sufficient air flow
Faulty Thermostat
Change thermostat
Faulty fan
Check fan capacitor
Check fan motor.
Fan faulty intervention of
thermal overload
Check electrical absorption
Replace fan motor.
Faulty FAN operation
Change fan control or SND
thermostat
Heater at lockout.
Red lamp illuminated
Faulty ignition
Check that the gas type is
suitable for heater
Check gas pressure
Check head pressure.
Check injector size is correct for
the heater
Ionisation probe faulty
Check electrical connection to
the probe.
Check probe
Change ionization probe.
Faulty ignition probe
Change ignition electrode
Faulty solenoid
Change solenoid
Dirty gas filter
Clean filter
Control box will not reset.
Red light illuminated
Faulty flame control module
Change control module check
electrical connections
Fan works intermittently
Faulty FAN operation
Change fan control or SND
thermostat
Insufficient gas pressure
Check that the gas type is
suitable for heater
Check gas pressure
Check head pressure.
Check injector size is correct for
the heater
The fan does not work
Faulty FAN operation
Change fan control or SND
thermostat
Faulty fan
Check fan operation
Check fan motor.
Heater works continuously
without reaching the required
temperature
Heater to small for application
Insufficient gas pressure
Re check heat output required
for application
Check that the gas type is
suitable for heater
Check gas pressure
Check head pressure.
Check injector size is correct for
the heater
Dirty heat exchanger
Clean heat exchanger
