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970006_SM_WA 45-300_4.3_EN-TY-FR_20100922.doc
Observation Failure
Remedy
Burner does not start / fan is not running:
No light in the green control
lamp
Power supply to the unit has
been disconnected
Check the power supply
No light in the green control
lamp
Fuse in the unit is defective
Replace the fuse
No light in the green control
lamp
The OT thermostat has
switched the heater off.
Check V-belt, the direction of
rotation of the fan, and the air
flow through the heater.
Green control lamp in the
control panel is on, red
control lamp is on
The thermal relay of the fan
motor has disconnected
Reset thermal relay
Green control light in control
panel is on, red control light
on burner is on
Burner is defective
See instructions from burner
supplier.
Contact a service engineer.
Green control lamp in control
panel is off
OT thermostat has
disconnected the unit
Reset the OT thermostat and
find the reason for the
superheating
Burner has stopped / fan is still running:
Fan switch is in ”MAN” or
”AUT” position
Limit thermostat has
disconnected the fan
The burner will start
automatically when the
exhaust air temperature has
dropped. Investigate the
reason for the disconnection.
Burner works / fan does not start:
Fan switch is in ”AUT” pos.
Fan thermostat is defective or
not correctly set
Check or replace fan
thermostat
Fan switch is in ”MAN” or
“AUT” pos.
Fan motor defective
Replace the motor
Fan switch is in ”MAN” or
“AUT” pos.
Fan contactor defective
Replace the contactor
Fan switch is in ”MAN” or
“AUT” pos.
V-belt defective
Replace the V-belt
Summary of Contents for WA 120
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