21
5. Fault finding
In case of failure - check the following points:
- Is there any gas at the burner?
- Is there any oil in the tank and are all valves open?
- 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
Fuse in the unit is defective. Renew the fuse
Green control light in Thermal relay of fan motor Reset thermal relay
the control panel is on has operated.
Red control light is on
Green control light on OT thermostat has disconnected Reset OT thermostat and find
control panel is on, the unit. the reason for the super-
red control light on heating
burner is on
Burner stopped / fan still running
Fan breaker in position The limit thermostat has The fan will start automatically
„Man“ or „AUTO“ disconnected the fan. when the exhaust air temp-
erature has fallen. Investigate
the reason for the disconnec-
tion.
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“
Fan contactor defective Change the contactor
To Next Page
Loading...