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5. Fault finding
In case of failure - check the following points:
- Is there any oil in the tank and are all valves open?/Is there any gas supply?
- Is the current supply to the unit OK?
- Is the room thermostat/week-end panel set to a temperature higher than the room temperature?
- Are the air intake- and exhaust openings open?
If the above points are OK, check the unit according to the table below
Burner will not start / fan not running:
No light in green The current to the unit has Check the current supply
control light been disconnected
OT thermostat has Reset OT thermostat and find
disconnected the unit the reason for the superheating
Green control light Burner defective See burner manual
in the control panel
is on. Red control
light is on
Burner stopped / fan still running
Fan breaker in The limit thermostat has The fan will start automatically
position “Man” disconnected the fan when the exhaust air temperature
or “AUTO” has fallen. Investigate the reason
for the disconnection.
The burner works / the fan does not start
The fan breaker is Fan thermostat defective Check fan thermostat
in position “AUTO” or set wrongly
Fan breaker in Fan motor defective Change the motor
position “MAN”
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