User, Installation and Service Manual for F1 Gas Unit Heaters
29
Ed. 11/2006
TROUBLESHOOTING FLOW CHART
Consult your
installer
The heater does not
start neither for heating
nor for ventilation
Main switch
ON
Check the fuse. Is
it burnt-out?
Open the gas supply.
Main switch
OFF
Check for
correct electric
supply and phase
Electric supply
is 230-240 V -
50 Hz ?
Phase reaches
the correct
terminal
With unit on and off
check for correct
gas pressure
Is it correct as in
the installation
manual?
The Summer /
Winter switch is
in summer
position?
Is the unit equipped
with a timer
thermostat?
The thermostat
requires heating
Replace the combustion
blower capacitor. If this
action does not resolve the
problem, replace the flue fan.
Check for
correct
ambient
thermostat
operation. Is
the contact
open?
Check for correct
temp. limit thermostat
operation.
Is the contact open?
Check the
pressure switch
for correct
operation.
Pressure switch
locked out in
N.A. position?
Check installation
conditions.
1)
Pipe length
2)
Pipe clogging
3)
Pressure switch
tube obstructed.
If necessary,
calibrate the
pressure switch.
Replace the
defective
thermostat, then
check fan again
Replace the defective
thermostat, then
check flue fan again
Troubleshoot for
overheating (excessive
gas supply, fan failure,
etc...)
Replace the
defective press.
switch
Place the
thermostat on
heating
Place the ambient
thermostat on
maximum
temperature
Replace the
fuse
Exchange the live
wire with the
neutral wire
Correct pressure using
proper
pressure reducers (as regards
L.P.G. units) trn to the gas
supplier
YES
YES
NO
Any unit
overheating?
Continues
on page 27
YES
YES
YES
NO
NO
NO
NO
YES
NO
YES
NO
YES
NO
NO
NO
YES
NO
NO
YES
NO
YES
YES
Switch the
summer/winter
switch to winter
position
Turn on the thermostat
Does the
combustion
blower starts?
Is the
combustion
blower live?