Robur M40 - Page 34

Maintenance
34
7
Figure7.1
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?
Summer/winter
shunt on winter?
Is the unit equipped
with a timer
thermostat?
The thermostat
requires heating
Does the
fan start?
Is the flue
fan live?
Replace the flue fan
capacitor. If the failure
persists, replace the fuse.
Check for
correct
ambient
thermostat
operation. Is
the contact
open?
Check for correct
temp. limit thermostat
operation.
Is the contact open?
Check for correct
safety 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) Combustion air
restrictor
3) Pipe clogging
4) Pressure switch
silicone pipe
obstructed. Reset the
thermostat if necessary.
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
Place the
summer/winter
shunt on winter
Any unit
overheating?
Continues
YES
YES
YES
NO
NO
NO
NO
YES
NO
YES
NO
YES
NO
NO
NO YES NO
NO
NO
YES
YES
YES
NO
YES
YES
Y
ES
NO